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Bike > Bike Accessories > Bike Powermeters
Bike Powermeters

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FSA Alloy PowerBox Power Meter Crankset FSA Alloy PowerBox Power Meter Crankset
Getting into the power game can be a daunting prospect, but FSA--in partnership with Power2Max--lowers the bar for entry with the PowerBox Power Meter Crankset. The PowerBox is undeniably one of the most affordable models in the power meter industry, but suggesting that it's an entry level option isn't quite accurate. A downloadable system update (available from September 2017) changes it from a single-leg meter to a dual-leg meter. It's built to grow with you, not to be outclassed once a category upgrade means a single leg meter is no longer accurate enough to give you the detailed info you need on race day. Out of the box, the meter measures power in a single leg and calculates total output to an industry-standard +/-2%. It wirelessly transmits those numbers to ANT+ head units, and Bluetooth compatibility is also available with a system update. FSA's BB386EVO design also provides virtually limitless compatibility, as you're never more than a simple adapter away from fitting the 30mm spindle to whatever standard your frame's bottom bracket shell adheres to.
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$745.99
Garmin Vector Replacement Cleat - 6 Degree Float Garmin Vector Replacement Cleat - 6 Degree Float
Swap out your old, worn, and tattered Garmin Vector cleats with the Garmin Vector Replacement Cleats with 6 Degree Float. That bit of float lets your foot move just enough laterally to keep knees happy and fine tune your preferred pedal stroke. As an added bonus, these cleats are made from durable thermoplastic for long-lasting functionality and feature anti-slip rubber along the edges to further reduce wear and prevent slipping when you shuffle across the tiled floor of your favorite local roastery in search of a mid-ride pastry.
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$24.99
Pioneer Ant+ Heart Rate Monitor Pioneer Ant+ Heart Rate Monitor
Whether you're looking to replace an old, uncomfortable rubber heart rate strap or just diving into the world of HR data tracking, the Pioneer Ant+ Heart Rate Monitor provides the comfort of soft fabric against your skin and wireless ANT+ compatibility to track your workout intensity. The sensor is easily removable, which means you can hand wash the strap as often as you'd like for fresh, clean comfort. It's powered by a standard CR2032 battery for inexpensive, quick battery replacement when needed.
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$69.95
Pioneer Dura-Ace R9100 Powermeter Crankset Pioneer Dura-Ace R9100 Powermeter Crankset
Proven in the peloton and available with Shimano's flagship new flagship drivetrain, the Pioneer Dura-Ace R9100 Powermeter Crankset adds data collection to your training, helps you analyze every ride, and doesn't compromise the drivetrain for those of us who appreciate a build where every component is the same make and model. Its sleek design integrates cleanly into the crankset and features dual-leg strain gauges for independent pedal data and other detailed metrics. It transmits those data to any ANT+ cycling computer, and pairing it with one of Pioneer's own cycling computers opens up an even wider world of torque vector analysis for those of us who want to dig into the really nitty gritty minutiae in search of marginal gains and a few extra watts. The system measures pedaling force, direction, and overall efficiency via dual strain gauges bonded to the crank arms. Either sensor unit captures 12 points of rotation at 30-degree intervals by measuring minute changes in the shape of the crank caused when force is applied while pedaling. From this, force is calculated in both the direction of rotation and the radial direction. The combination of these two force components indicates the direction in which the total force is being applied, which is shown using the system's force vectors. Also, a magnet ring that attaches to the bottom bracket measures the position of the crank, allowing precise display of the force vectors at every 30-degree interval throughout rotation. The force vectors for one full rotation are then wirelessly transmitted to any ANT+ head unit via the transmitter module bolted in the crankset's spider. The information centers around pedaling efficiency, giving riders the ability to target inefficiencies for improvement in training and racing. When pedaling efficiency is high, most of the rider's power is being used to rotate the pedals. So, the force measured in the direction of rotation at each of the 12 points is combined to give the total po...
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$999.99
Pioneer Left Arm Power Meter Installation Kit for Consumer Supplied Cranks Pioneer Left Arm Power Meter Installation Kit for Consumer Supplied Cranks
While dual-leg power measurement is arguably the end goal for obtaining the best data and range of metrics possible, it also comes with a price tag that isn't for the faint of heart. Pioneer gives riders an affordable way to gather precious power data with its Left Arm Power Meter Installation Kit for Consumer Supplied Cranks. Designed to pair with your current Shimano Dura-Ace, Ultegra, or 105 left crank arm, this kit provides single leg power readings to take your training to the next level without cleaning out your bank account. If you do decide to make the jump to dual-leg in the future, you're able to add Pioneer's drive side upgrade kit for the full compliment of power metrics. This system uses a strain gauge to measure pedaling force, direction, and overall efficiency as you ride, and it's right on par with industry standards at +/-2% accuracy. The power meter unit has a sleek profile on the inside of the crank arm, and only adds a claimed 22g to your frame. As you pedal, the sensors capture 12 points of rotation at 30-degree intervals, taking a measurement 16 times at each point to ensure accuracy. By recording information at multiple points, Pioneer is able to deliver a single accurate measurement that takes the entire pedal stroke into consideration.Riding through significant temperature or elevation fluctuations can wreak havoc on your power meter. Pioneer knows how frustrating it is to have to re-zero your device on-course, and how tough it is to recover momentum lost while you freewheel to let the unit zero. To address this common problem, it developed Zero Point Calibration with Active Temperature Memory Adjustment for its power meters. Essentially, the technology allows the power meter to anticipate and adapt quickly to environmental changes so that you don't lose access to accurate data when you need it most.The power meter is also compatible with ANT+, which makes using it with your favorite fitness apps or other ANT+ compatible devices simpl...
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$499.99
Pioneer Power Meter & Computer Color Kit Pioneer Power Meter & Computer Color Kit
One of the major criticisms Pioneer's new crankset power meters faced when first introduced was their extremely limited color palette, with cyclists lamenting whether mounting a power meter in Pioneer Red would ruin the carefully-curated aesthetics of their frames. We thought the criticism was justified, and so did Pioneer, so it created the Power Meter and Computer Color Kit, expanding the options for colors with pieces that cover the power meter and matching Pioneer computer. Not just choosing from a random list of colors, Pioneer matched the kit to pro team colors, and whether your favorite is among the chosen five or not, you can enjoy a range of colorful options that won't disrupt the clean style of your frame.
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$24.95
Pioneer Power Meter Installation Kit for Consumer Supplied Cranks Pioneer Power Meter Installation Kit for Consumer Supplied Cranks
If you're riding current generation aluminum crank arms but missed out on a powermeter model, then chances are good that the Power Meter Installation Kit for Consumer Supplied Cranks is your ride metric salvation. It adds data analysis to your alloy crank, letting you train smarter by analyzing your entire pedal stroke to help identify weaknesses and areas for improvement. The kit consists of a magical box, and the process is simple. Just drop your Shimano crankset into the box, drop the box in the mail, and wait for some seven to ten business days. During that time period, the alchemists at Pioneer will be transubstantiating your crankset from a shapely alloy article to a power-gathering data magnet. When the crankset returns to you, it will have a Pioneer power meter installed. Pioneer recently updated the original list of compatible cranksets, which was limited to Shimano Dura-Ace 9000 and Ultegra 6800. In addition to those two racing stalwarts, the powermeter installation kit now accommodates cranksets including the new Dura-Ace 9100, 105 5800, XTR Trail M9020, and XT M8000. The list also expands beyond Japan to include products engineered in Italy (Campagnolo Potenza), the US (Cannondale's Si and Si-SL2) and FSA's SL-K, a crankset whose ubiquity has made it a true citizen of the world.
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$999.00
Pioneer Power Meter Patch Magnets Pioneer Power Meter Patch Magnets
Whether you lost the originals in a crash or are building up a new racing bike, Pioneer's Power Meter Patch Magnets have your needs covered. They're compatible with the Pioneer's Shimano crankset power meters, letting you freely swap your power meter between bikes for weekend TTs and the like.
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$14.95
Pioneer Right Side Power Upgrade Kit Pioneer Right Side Power Upgrade Kit
By splitting its complete power meter system into multiple, free-standing pieces, Pioneer essentially provided a gateway to get into the watts-measuring game gradually rather than dropping over $1,000 at once. The Right Side Power Upgrade Kit is actually just a box that, if you drop your drivetrain crank arm and chainrings in and ship it off to Pioneer, transforms your mundane crankset into a power meter-equipped data monster. Of course, the process isn't magical or mysterious at all. It's simple. While Pioneer has your drive-side crank arm, it will install a power meter sensor to it, and the only labor you need to worry about is re-installing the crank. The Right Side Power Upgrade Kit is perfectly capable of functioning as a stand-alone power meter; however, when combined with Pioneer's non-drive-side power meter, it opens the door for more accurate measurements by logging numbers for both legs rather than just doubling the readings recorded through a single crank arm. While the Single Leg system works well, the Dual Leg model takes your numbers and training to the next level.
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$579.00
Pioneer Shimano Dura-Ace 9000 Single Leg Power Meter Crank Arm Pioneer Shimano Dura-Ace 9000 Single Leg Power Meter Crank Arm
Since being introduced in 2013, Pioneer's crank arm power meters have become ubiquitous everywhere from T1 at a local triathlon to 86 podium appearances for the men and women of UnitedHealthcare Pro Cycling Team. Two years in, the technology is proven, but the huge metric-gathering, data-crunching capabilities that Pioneer built into it mean the entire system -- a Dual Leg Power Meter and Pioneer computer -- also comes with a huge price tag. The pros may need all of that extra information, but for a typical Cat 4 or a fitness-focused recreationalist, popping for the whole system may be overkill -- at least initially. The new Shimano Dura-Ace Single Leg Power Meter Crank Arm addresses these needs, providing a more affordable entrance to the world of Pioneer power metrics that leaves the door open for future upgrades. Upgrade path aside, the Single Leg Power Meter is an impressive piece of tech on its own, and since it broadcasts wirelessly with ANT+, chances are good that it's already compatible with your current head unit or wearable. It measures pedaling force, direction, and overall efficiency by monitoring 12 points of rotation at 30-degree intervals across the pedal stroke. At each point, the deflection caused by radial and tangential forces on the crank arm is scanned 16 times to ensure a claimed +/-2% accuracy. The system's Active Temperature Memory Adjustment feature maintains that accuracy in temperatures ranging from 14 to 122 degrees Fahrenheit, so it stays on point even in extreme conditions. This eliminates the need to freewheel in the middle of a race in order to zero the system, a situation that can cost you precious momentum during a solo effort or make you lose your safe position near the front just as the race hits a climb. The unit also has a waterproof rating of IPX6 and IPX7, so it can handle inclement conditions as well as extreme temperatures. The system uses Shimano's top-tier Dura-Ace crank arm as a platform, matching the meter's unmatched...
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$629.00
Pioneer Shimano Dura-Ace R9100 Single Leg Power Meter Crank Arm Pioneer Shimano Dura-Ace R9100 Single Leg Power Meter Crank Arm
If you've just upgraded to Shimano's latest flagship drivetrain, we'd understand why you might be a bit uneasy about springing for a full, dual-leg power setup. Pioneer's Dura-Ace R9100 Single Leg Power Meter Crank Arm lets you quantify the gains in efficiency made by Shimano's crankset redesign, letting you track your physical progress as you progress toward upgrading to a full power meter. Or not. The single-leg approach may not let you parse out the power production nuances of each leg individually, but it does provide a full number in order to chart your total output. For most cyclists, that's more than enough to get a leg up on their goals. The Single Leg Power Meter is an impressive piece of tech on its own, and since it broadcasts wirelessly with ANT+, chances are good that it's already compatible with your current head unit or wearable. It measures pedaling force, direction, and overall efficiency by monitoring 12 points of rotation at 30-degree intervals across the pedal stroke. At each point, the deflection caused by radial and tangential forces on the crank arm is scanned 16 times to ensure a claimed +/-2% accuracy. The system's Active Temperature Memory Adjustment feature maintains that accuracy in temperatures ranging from 14 to 122 degrees Fahrenheit, so it stays on point even in extreme conditions. This eliminates the need to freewheel in the middle of a race in order to zero the system, a situation that can cost you precious momentum during a solo effort or make you lose your safe position near the front just as the race hits a climb. The unit also has a waterproof rating of IPX6 and IPX7, so it can handle inclement conditions as well as extreme temperatures.
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$629.99
Pioneer Shimano Ultegra 6800 Single Leg Power Meter Crank Arm Pioneer Shimano Ultegra 6800 Single Leg Power Meter Crank Arm
Pioneer has forged ahead in the power meter market with the Shimano Ultegra 6800 Single Leg Power Meter Crank Arm. No longer confining the power meter to the intricate drive-side crank assembly, this meter is ideal for those riders looking to have power data measurement that also will not cost a college tuition.The meter itself is housed in a sleek profile on the frame-side of the left crank arm to maintain the clean Ultegra aesthetic while capturing measurements at 12 points of rotation at 30-degree intervals, with 16 measurements taken at each point for accuracy. What this means for you is that you get industry standard +/-2% accuracy power data without the appearance of being obsessed with your training goals.Zero Point Calibration with Active Temperature Memory Adjustment is also on-board to ensure power data accuracy while riding through varying temperatures on your adventures. The ANT+ compatibility also allows you to utilize most current cycling head units and apps, and it pairs well with Pioneer's own cycling computer to gain access to the new HDPower Metrics and Cyclo Sphere program.
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$559.00
Quarq DFour Power Meter Crank Arms - BB30 Quarq DFour Power Meter Crank Arms - BB30
Though Quarq is technically part of the SRAM family (SRAMily' No, we wouldn't do that to you.), the BB30 DFour Power Meter Crank Arms prove that the brand doesn't take a Hatfield/McCoy approach to inter-brand compatibility. The DFour is, essentially, the DZero model but with one fewer chainring bolts and a bolt circle diameter (BCD) that fits Shimano's latest generation of 11-speed road chainrings, specifically Dura-Ace 9000, Ultegra 6800, and 105 5800. That means that, with the exception of the latest Dura-Ace 9100, the DFour is compatible with every 11-speed road drivetrain Shimano has engineered to date, so fans of the Japanese company aren't relegated to choosing between more expensive or less accurate power meter options. The BCD may be Shimano, but the crank arms themselves are all SRAM. They're built with the same Exogram construction process used in the brand's top groupsets, so they're around 200 claimed grams lighter than the aluminum model. The BB30 version of the DFour also ships with the spacers and wave washer hardware required to install it in a BB386EVO bottom bracket--a bottom bracket standard that the aluminum DZero isn't compatible with. Except for that compatibility difference, the DFour incorporates every piece of technology Quarq crams into the DZero. Chief among these is the power meter itself, which saw a healthy amount of retooling. Overall, Quarq claims that "150 documented improvements" inform the evolution from the previous models to DFour, but the most important is to the heart of the meter itself: the strain gauges and measurement circuitry. It still incorporates five strain gauges strategically placed throughout the spider in order to measure the Newton meters you're throwing into the pedals. It's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters, but the new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections m...
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$999.99
Quarq DFour Power Meter Crank Arms - GXP Quarq DFour Power Meter Crank Arms - GXP
Few brands in the power meter game combine function with price as well as Quarq, but--since the brand is part of the SRAM family--every new generation of Quarq tech means Shimano riders may be in danger of being left with less effective or more expensive options. The DFour Power Meter Crank Arms for GXP bottom brackets assuage those worries by bringing the latest Quarq power meter model to those of us who insist on Japanese drivetrains. The crank arms themselves are all SRAM; they're built with the same Exogram construction process used in the brand's top groupsets, so it saves around 200 claimed grams over the aluminum model. The DFour is, essentially, the DZero model but with one fewer chainring bolts and a bolt circle diameter (BCD) that fits Shimano's latest generation of 11-speed road chainrings, specifically Dura-Ace 9000 (sorry, no 9100 compatibility yet), Ultegra 6800, and 105 5800. Except for that compatibility difference, the DFour incorporates every piece of technology Quarq crams into the DZero. Chief among these is the power meter itself, which saw a healthy amount of retooling. Overall, Quarq claims that "150 documented improvements" inform the evolution from the previous models to DFour, but the most important is to the heart of the meter itself: the strain gauges and measurement circuitry. It still incorporates five strain gauges strategically placed throughout the spider in order to measure the Newton meters you're throwing into the pedals. It's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters, but the new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections mean the DFour also better rations battery life than Quarq's previous power meter models, though when the battery does go out, you can still change it without tools or having to ship the whole thing to the manufacturer. As with the DZero model it's based on, the DFour syst...
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Quarq DFour Power Meter Spider Quarq DFour Power Meter Spider
The DFour Power Meter Spider is for cyclists already equipped with a Quarq Elsa RS eight-bolt power meter who are interested in the improved functionality of Quarq's latest, DZERO technology. This smart spider lets you keep the components from Quarq (spindle and crank arms) and Shimano (chainrings) that you're currently using, letting you upgrade to more precise power data without forcing you to toss perfectly a perfectly good crank chassis. If you've got the Prime crank and want to up your training/competitive game, then the upgrade makes obvious sense. If you're already rocking a previous generation of Quarq's 8-bolt powermeter spider, then the reasons are, admittedly, less compelling, and are defined by the internal changes Quarq made to the meter. Of these, the most important is to the heart of the meter itself: the strain gauges and measurement circuitry. The new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections mean the DZero also better rations battery life than Quarq's previous power meter models, though when the battery does go out, you can still change it without tools or having to ship the whole thing to the manufacturer. It still incorporates five strain gauges strategically placed throughout the spider, and it's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters. DZero's accuracy is further boosted by the return of Quarq's 10k dynamic temperature compensation technology, which alleviates the need for constant, mid-race zeroings in variable conditions. Even if it's just coasting for a few seconds or toggling through your head unit to the proper option, it can still be the difference between winning and losing. It's also obnoxious as hell. The DZero is equipped with an auto-adjust schedule based on a constellation of around 10,000 data points that chart how the unit responds to temperatures ranging from zero to 130 degrees Fahre...
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$779.00
Quarq DZero Aluminum Power Meter Crank Arms - BB30 Quarq DZero Aluminum Power Meter Crank Arms - BB30
Over the last 10 years, Quarq has been all over the map with technologies, innovations, and compatibilities spread across multiple power meter generations. The new BB30 DZero Aluminum Power Meter Crank Arms span the breadth of these product cycles by combining almost every bit of technology Quarq has developed during that span into the latest generation of power meters, which it's calling DZero. The only omissions here are the use of alloy instead of SRAM's Exogram carbon and BB386EVO compatibility, which Quarq reserves for DZero power meters with Exogram carbon crank arms. Of course, the fact that this model features aluminum crank arms brings it more easily within reach of the self-sponsored cyclist--effectively giving power to the people. Those omissions aside, the list of included technologies is an all-inclusive romp through Quarq's feature menu. Chief among these is the power meter itself, which saw a healthy amount of retooling. Overall, Quarq claims that "150 documented improvements" inform the evolution from the previous models to DZero, but the most important is to the heart of the meter itself: the strain gauges and measurement circuitry. It still incorporates five strain gauges strategically placed throughout the spider in order to measure the Newton meters you're throwing into the pedals. It's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters, but the new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections mean the DZero also better rations battery life than Quarq's previous power meter models, though when the battery does go out, you can still change it without tools or having to ship the whole thing to the manufacturer. DZero's accuracy is further boosted by the return of Quarq's 10k dynamic temperature compensation technology, which alleviates the need for constant, mid-race zeroings in variable conditions. Even if it's just c...
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$779.00
Quarq DZero Aluminum Power Meter Crank Arms - GXP Quarq DZero Aluminum Power Meter Crank Arms - GXP
With a brand whose catalogue spans the breadth of Quarq's, a claim that a product encompasses every technological advancement therein is a bit hard to swallow, to say the least. With the GXP-compatible DZero Aluminum Power Meter Crankarms, Quarq doesn't go quite that far. Instead, the claim is tempered with the addition of "almost" before "every"--though the scope of tech embodied by the powermeter is no less impressive for that disclaimer. The only omissions here are the use of alloy instead of SRAM's Exogram carbon and BB386EVO compatibility, which Quarq reserves for DZero's carbon-armed species. Of course, the fact that this model features aluminum crank arms brings it more easily within reach of the self-sponsored cyclist by adding power to a more affordable aluminum chassis. Those omissions aside, the list of included technologies is an all-inclusive romp through Quarq's feature menu. Chief among these is the power meter itself, which saw a healthy amount of retooling. Overall, Quarq claims that "150 documented improvements" inform the evolution from the previous models to DZero, but the most important is to the heart of the meter itself: the strain gauges and measurement circuitry. It still incorporates five strain gauges strategically placed throughout the spider in order to measure the Newton meters you're throwing into the pedals. It's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters, but the new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections mean the DZero also better rations battery life than Quarq's previous power meter models, though when the battery does go out, you can still change it without tools or having to ship the whole thing to the manufacturer. DZero's accuracy is further boosted by the return of Quarq's 10k dynamic temperature compensation technology, which alleviates the need for constant, mid-race zeroings in v...
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$779.00
Quarq DZero Carbon Power Meter Crank Arms - BB30 Quarq DZero Carbon Power Meter Crank Arms - BB30
Power meters tend to be a delicate balance in economy vs. accuracy and reliability, with a consistent negative correlation between the two categories. Quarq's power meters are typically the exception to this rule, and the BB30 DZero Carbon Power Meter Crank Arms represent the culmination of a decade of the brand's industry-defining R&D. Chief among these developments is the power meter itself, which saw a healthy amount of retooling for the DZero model. Overall, Quarq claims that "150 documented improvements" inform the evolution from the previous models to DZero, but the most important is to the heart of the meter itself: the strain gauges and measurement circuitry. It still incorporates five strain gauges strategically placed throughout the spider in order to measure the Newton meters you're throwing into the pedals. It's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters, but the new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections mean the DZero also better rations battery life than Quarq's previous power meter models, though when the battery does go out, you can still change it without tools or having to ship the whole thing to the manufacturer. The DZero system's accuracy is further boosted by the return of Quarq's 10k dynamic temperature compensation technology, which alleviates the need for constant, mid-race zeroings in variable conditions. Even if it's just coasting for a few seconds or toggling through your head unit to the proper option, it can still be the difference between winning and losing. It's also obnoxious as hell. The DZero is equipped with an auto-adjust schedule based on a constellation of around 10,000 data points that chart how the unit responds to temperatures ranging from zero to 130 degrees Fahrenheit. This lets the power meter figure out the atmospheric details for you with minimal drift, so you can focus o...
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Quarq DZero Carbon Power Meter Crank Arms - GXP Quarq DZero Carbon Power Meter Crank Arms - GXP
Quarq's latest power meter model, the DZero Carbon Power Meter Crank Arms for GXP bottom brackets, may not be as ambitious as the D0 (zero) project for which it's named, but it comes damned close. The DZero essentially combines all of the features that Quarq has teased out of the lab over the past decade, plus a few improvements. Chief among these developments is the power meter itself, which saw a healthy amount of retooling for the DZero model. Overall, Quarq claims that "150 documented improvements" inform the evolution from the previous models to DZero, but the most important is to the heart of the meter itself: the strain gauges and measurement circuitry. It still incorporates five strain gauges strategically placed throughout the spider in order to measure the Newton meters you're throwing into the pedals, and it features the same Exogram carbon crank arms so it's lighter and stiffer than the aluminum model and more efficiently transfers those watts. It's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters, but the new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections mean the DZero also better rations battery life than Quarq's previous power meter models, though when the battery does go out, you can still change it without tools or having to ship the whole thing to the manufacturer. The DZero system's accuracy is further boosted by the return of Quarq's 10k dynamic temperature compensation technology, which alleviates the need for constant, mid-race zeroings in variable conditions. Even if it's just coasting for a few seconds or toggling through your head unit to the proper option, it can still be the difference between winning and losing. It's also obnoxious as hell. The DZero is equipped with an auto-adjust schedule based on a constellation of around 10,000 data points that chart how the unit responds to temperatures ranging from zer...
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Quarq DZero Power Meter Spider Quarq DZero Power Meter Spider
Quarq built the DZero Power Meter Spider for two very good reasons. The first is upgrade purposes, letting current Quarq owners take advantage of the DZero's updates by swapping out the spider but keeping the same crank arms and spindle. (After all, why dump perfectly good components') The second reason is part of Quarq's new Quarq Prime initiative, where the brand is shipping SRAM-built cranksets on new bicycles that are already primed for power. Like with the upgrade process described above, you'll just have to pop the Prime crank's mundane spider off, replace it with the DZour power model, and get to cranking. If you've got the Prime crank and want to up your training/competitive game, then the upgrade makes obvious sense. If you're already rocking a previous generation of Quarq's 8-bolt powermeter spider, then the reasons are, admittedly, less compelling, and are defined by the internal changes Quarq made to the meter. Of these, the most important is to the heart of the meter itself: the strain gauges and measurement circuitry. The new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections mean the DZero also better rations battery life than Quarq's previous power meter models, though when the battery does go out, you can still change it without tools or having to ship the whole thing to the manufacturer. It still incorporates five strain gauges strategically placed throughout the spider, and it's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters. DZero's accuracy is further boosted by the return of Quarq's 10k dynamic temperature compensation technology, which alleviates the need for constant, mid-race zeroings in variable conditions. Even if it's just coasting for a few seconds or toggling through your head unit to the proper option, it can still be the difference between winning and losing. It's also obnoxious as hell. The DZero is equi...
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$679.00
Quarq SRAM Red DZero Power Meter Crank Arms - BB30 Quarq SRAM Red DZero Power Meter Crank Arms - BB30
For the self-sponsored racer who uses multiple bikes in different disciplines, the powermeter game can turn into an exercise in astronomic expenditure. Quarq's SRAM Red DZero Power Meter Crank Arms address economic concerns by combining every key piece of powermeter technology in Quarq's stable with a redesigned measurement circuit, the same relatively attainable price that defined the new system's predecessors, and the ability to quickly swap between frames and chainrings for omniums. The result is an uncompromising platform whose less-capable predecessors were ridden to sprint victories, solo stage wins, and grand tour podiums by Katusha and Ag2r-La Mondiale in 2016 alone. Since the Red DZero represents an improved version of that model, we're eager to see what it can do this year in both the peloton and our own bottom brackets. As with the rest of the DZero line, the Red model still incorporates five strain gauges strategically placed throughout the spider in order to measure the Newton meters you're throwing into the pedals, and--except for the alloy spider--it features the same Exogram carbon crank arms and graphical treatment as the standard Red crank. It's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters, but the new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections mean the latest SRAM Red power meter model also better rations battery life than the previous generations, though when the battery does go out, you can still change it without tools or having to ship the whole thing to the manufacturer. The Red DZero system's accuracy is further boosted by the return of Quarq's 10k dynamic temperature compensation technology, which alleviates the need for constant, mid-race zeroings in variable conditions. Even if it's just coasting for a few seconds or toggling through your head unit to the proper option, it can still be the difference be...
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$999.99
Quarq SRAM Red DZero Power Meter Crank Arms - GXP Quarq SRAM Red DZero Power Meter Crank Arms - GXP
Industry literature discussing powermeters is replete with hyperbolic claims, but Quarq's SRAM Red DZero Power Meter Crank Arms for GXP bottom brackets enjoy a pedigree that speaks for itself. The Red DZero is the latest member of a family that includes wins in the most prestigious races in the world, ranging from Roubaix to Paris and Kona. It incorporates every advancement that Quarq has made in power meter technology over the last decade, and it combines those advancements with an improved measurement circuit for even more accurate data across variable external conditions. As with the rest of the DZero line, the Red model still incorporates five strain gauges strategically placed throughout the spider in order to measure the Newton meters you're throwing into the pedals, and--except for the alloy spider--it features the same Exogram carbon crank arms and graphical treatment as the standard Red crank. It's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters, but the new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections mean the latest SRAM Red power meter model also better rations battery life than the previous generations, though when the battery does go out, you can still change it without tools or having to ship the whole thing to the manufacturer. The Red DZero system's accuracy is further boosted by the return of Quarq's 10k dynamic temperature compensation technology, which alleviates the need for constant, mid-race zeroings in variable conditions. Even if it's just coasting for a few seconds or toggling through your head unit to the proper option, it can still be the difference between winning and losing. It's also obnoxious as hell. The DZero is equipped with an auto-adjust schedule based on a constellation of around 10,000 data points that chart how the unit responds to temperatures ranging from zero to 130 degrees Fahrenheit. This le...
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$999.99
Quarq SRAM XX1 Eagle DZero Power Meter Crank Arms - BB30 Quarq SRAM XX1 Eagle DZero Power Meter Crank Arms - BB30
Quarq introduces the SRAM XX1 Eagle DZero Power Meter BB30 Crank Arms by noting that they embody every piece of Quarq technology produced during the past decade of powermeter R&D. With the latest XX1 model, all of that technology is paired with hollow Carbon Tuned XX1 crank arms, which can safely be dubbed the epitome of the last decade of SRAM's R&D. Unlike the standard XX1 Eagle and vanilla XX1 cranksets, which are direct-mount, the DZero Eagle features a four-bolt spider compatible with an X-Sync 2 or X-Sync 104 BCD chainring, depending on your drivetrain. We do like the simplicity and modularity of the direct-mount chainring design, but the powermeter's strain gauges and electronics live in the spider, so eliminating it isn't an option in the Quarq system. As with the rest of the DZero line, the XX1 model incorporates five strain gauges strategically placed throughout the spider in order to measure the Newton meters you're throwing into the pedals, and--except for the alloy spider--it features the same Exogram carbon crank arms and graphical treatment as the standard Red crank. It's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters, but the new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections mean the latest SRAM Red power meter model also better rations battery life than the previous generations, though when the battery does go out, you can still change it without tools or having to ship the whole thing to the manufacturer. The DZero system's accuracy is further boosted by the return of Quarq's 10k dynamic temperature compensation technology, which alleviates the need for constant zeroings in the variable conditions often encountered over the course of long days in the mountains. The DZero is equipped with an auto-adjust schedule based on a constellation of around 10,000 data points that chart how the unit responds to temperatur...
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$999.99
Quarq SRAM XX1 Eagle DZero Power Meter Crank Arms - GXP Quarq SRAM XX1 Eagle DZero Power Meter Crank Arms - GXP
Anyone who's had the opportunity to pedal an XX1 Eagle bike in anger will likely agree that the 12-speed, flagship drivetrain is the epitome of SRAM technological development. Anyone who's used Quarq's flagship DZero powermeter to count the watts produced by angry pedaling will also likely agree with Quarq that it's the epitome of that brand's technology. When the two are combined in the GXP-compatible Quarq SRAM XX1 Eagle DZero Power Meter Crank Arms, well, good things are bound to happen. Before going any further, we should note that, unlike the standard, direct-mount XX1 Eagle and vanilla XX1 cranksets, the DZero Eagle features a four-bolt spider compatible with an X-Sync 2 (XX1 Eagle) or X-Sync (XX1) 104 BCD chainring. We do like the simplicity and modularity of the direct-mount chainring design, but the powermeter's strain gauges and electronics live in the spider, so eliminating it isn't an option in the Quarq system. As with the rest of the DZero line, the XX1 model incorporates five strain gauges strategically placed throughout the spider in order to measure the Newton meters you're throwing into the pedals, and--except for the alloy spider--it features the same Exogram carbon crank arms and graphical treatment as the standard Red crank. It's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters, but the new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections mean the latest SRAM Red power meter model also better rations battery life than the previous generations, though when the battery does go out, you can still change it without tools or having to ship the whole thing to the manufacturer. The DZero system's accuracy is further boosted by the return of Quarq's 10k dynamic temperature compensation technology, which alleviates the need for constant zeroings in the variable conditions often encountered over the course of long days in the mo...
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$999.99
Quarq XX1 Eagle DZero Power Meter Crankset Package - BB30 Quarq XX1 Eagle DZero Power Meter Crankset Package - BB30
As evidenced by the DZero powermeter and Eagle drivetrain, Quarq and SRAM both have had pretty busy years recently. By adding an Eagle chainring, we combined the two sister companies' latest tech in the BB30-compatible Quarq XX1 Eagle DZero Power Meter Crankset Package, which adds some hi-fi function to your lo-fi trail bruiser. The powermeter at the chassis' heart represents the most advance five-gauge model Quarq has produced to date, and the redesign means its industry-leading accuracy requires even less correction across a range of conditions and altitudes. Less correction means less drain on battery, too, so you can answer the call of the wild for longer periods between battery changes.
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$999.99
Quarq XX1 Eagle DZero Power Meter Crankset Package - GXP Quarq XX1 Eagle DZero Power Meter Crankset Package - GXP
When designing its latest powermeter, the DZero, Quarq took a ground-up approach. Sister company SRAM did the same with its flagship XX1 Eagle drivetrain. Though SRAM's results from a ground-up re-engineering is bit more scorched earth, Quarq's is no less revolutionary. We've combined the two with an Eagle chainring in the GXP-compatible Quarq XX1 Eagle DZero Power Meter Crankset Package. The powermeter at the chassis' heart represents the most advance five-gauge model Quarq has produced to date, and the redesign means its industry-leading accuracy requires even less correction across a range of conditions and altitudes. Less correction means less drain on battery, too, so you can answer the call of the wild for longer periods between battery changes.
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$999.99
Rotor 2INpower Powermeter Crank Arms Rotor 2INpower Powermeter Crank Arms
Few areas of the cycling industry seem as unnecessarily cluttered with options as powermeters, but Rotor's 2INpower Powermeter Crankset, unveiled in 2016, has already earned its place at the table. Under Dimension Data's Cummings, the 2INpower was ridden to stage wins at Tirreno, the Dauphine, and the British, Basque, and French tours. That's an impressively developed pedigree for such a young product. Though Cummings' engine is largely responsible for that success, it's easy to assume that his penchant for knowing exactly when to make his move--and his ability to make 60km solo attacks stick--is informed by the accuracy and reliability of the info he's being fed by the 2INpower. We'll get to that info in a moment, but for now, the internals: Instead of housing them in the spider or in attachments to the crank arms or chainrings, Rotor situates all of the electronics in the spindle. This provides more protection against the elements (be they rain, snow, or tarmac encountered during the inevitable user error), and it also helps to tidy up the crank's silhouette by eliminating bulbous protrusions at the crank arm/chainring interface--of course, Rotor's typically aggressive, Euro-race graphical treatment and iconoclastic chainring designs still manage to stand out. While the electronics are all spindle-bound, the power measurement circuit encompasses both the spindle and the right crank arm, with both receiving four strain gauges for a total of eight. This seems excessive in an industry where five strain gauges is the high end of normal, but incorporating more gauges reduces the chance that external conditions (read: rapid changes in temperature) can adversely affect the 2INpower's accuracy. Since they're laid out in opposition, the eight gauges work as internal correctives to each other to provide more points of input, help the system reduce drift, and eliminate the need to constantly zero by establishing a more comprehensive body of aggregate data. As with other p...
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$999.99
Rotor INpower 3D30 Power Meter Crank Arms Rotor INpower 3D30 Power Meter Crank Arms
Having a power meter on your bike isn't just about "performance" gains. Tracking data can be its own reward, and it opens up myriad possibilities for using smart trainers to turn indoor winter miles into something bearable, if not actually enjoyable. But the obvious benefits of Rotor's INpower 3D30 Power Meter Crank Arms are that come race day, when all those winter trainer miles, spring base miles, hill repeats, and intervals are behind you, you'll be able to precisely meter your effort in order to achieve your best possible result. Of course, things don't always go as planned in races, but the INpower 3D30 meter does help smooth out some of the potential issues. In fact, the system was tested by guys like Rui Costa when he was riding for Lampre. (Which, for the record, Lampre's kits remain some of our favorite of all time.) The reason guys like Rui Costa rode INpower is, of course, the internals. Instead of the dual-leg, eight-gauge approach of the 2INpower model, the INpower meter uses four gauges to measure power coming through the left crank arm only. The strain gauges themselves live in the spindle. This provides more protection against the elements (be they rain, snow, or tarmac encountered during the occasional user error), and it also helps to tidy up the crank's silhouette by eliminating bulbous protrusions at the crank arm/chainring interface--of course, the grooved crank arms and (should you run them) Rotor's iconoclastic chainrings will still stand out. As with other power meter cranksets, the INpower's four strain gauges are all spindle-bound and it's equipped with an accelerometer to read cadence; unlike other meters, Rotor's design measures cadence over 500 times per pedal stroke. While the benefits of mapping minute changes in cadence over each leg's power production are immediately obvious to any data obsessive, the potential is magnified exponentially when paired with Rotor's Q-Ring system. It helps you chart the most efficient Q-Ring orienta...
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$959.00
Rotor INpower REX 1.1 Boost Power Meter Crank Arms Rotor INpower REX 1.1 Boost Power Meter Crank Arms
Rotor's INpower REX 1. 1 Boost Power Meter Crank Arms beg on immediate question: What kind of mountain biker wants power measurement' The answer: Us. And by "us," we mean roadies-cum-endurance hammerfesters and enduro shredders who relish the pain of climbs as much as the pleasure of dropping in. Plus, we admit that it's just a lot of fun to be able to record, parse, and analyze pedal stroke data--a fact that's even more true on the trail, where constantly changing gradients and terrain mean power output isn't as simple as push pedal; go up road. Instead of the dual-leg, eight-gauge approach of the 2INpower model, the INpower meter uses four gauges to measure power and pedal stroke data coming through the left crank arm only. The strain gauges themselves live in the spindle. This provides more protection against the elements (be they rain, snow, or trail furniture encountered during the occasional user error), and it also helps to tidy up the crank's silhouette by eliminating bulbous protrusions at the crank arm/chainring interface--of course, the grooved crank arms and (should you run them) Rotor's iconoclastic chainrings will still stand out. As with other power meter cranksets, the INpower's four strain gauges are all spindle-bound and it's equipped with an accelerometer to read cadence; unlike other meters, Rotor's design measures cadence over 500 times per pedal stroke. While the benefits of mapping minute changes in cadence over each leg's power production are immediately obvious to any data obsessive, the potential is magnified exponentially when paired with Rotor's Q-Ring system. It helps you chart the most efficient Q-Ring orientation possible to capitalize on the strengths of your pedal stroke while mitigating the weaknesses. The crank arms work just fine with traditional round rings, but adding Rotor's Q-Rings takes full advantage of the system's potential. The INpower transmits data via ANT+ Smart protocols, so chances are good that it's already com...
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$849.00
SRM Dura-Ace 9000 Wireless Powermeter SRM Dura-Ace 9000 Wireless Powermeter
This version of the SRM Power Meter features a larger diameter than Shimano's 7900 version. This adequately accommodates the larger FC-9000 crankset. In addition to allowing the crankset to fit properly, the new platform also provides more accurate measurement of the offset forces and torque patterns for your left versus right leg, which means more accurate overall power measurements. The wider diameter holds two batteries, which equates to almost 3,000 hours of use before needing to be recharged. SRM uses its tried and true eight strain gauges for measuring data. The 9000 Power Meter features an accuracy of +/- 2. 0% between 30 and 255 rpm, with a wattage range between 0 and 4096 watts, for that wild finishing sprint. The FC-9000 crank is the same Dura-Ace crank being touted for its versatility. You're able to run compact or standard rings on the same spider. Thanks in part to the four arm design, it is also lighter than, but just as stiff as, its predecessor. It uses Shimano's Hollowtech II and Hollowglide technology to create a stiff yet lightweight design with an unrivaled weight-to-stiffness ratio.
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$999.99
SRM Origin Carbon Power Meter Crankset SRM Origin Carbon Power Meter Crankset
Co-developed with the expertise of LOOK, the SRM Origin Carbon Power Meter Crankset offers the superb stiffness of LOOK carbon crank arms in conjunction with its smooth-shifting Shimano Dura-Ace 9000 chainring and SRM's highly accurate Power Meter spider. This power meter crankset drops below 600 grams with its LOOK carbon crank arms, providing significant weight savings and unbelievable power transfer on the road. Since it's outfitted with LOOK crank arms, the arm length quickly changes between 170, 12. 5, and 175 millimeters simply by rotating its asymmetrical Trilobe insert. The Origin Power Meter system is the go-to choice for many professional teams, due to its reputation as being the most accurate power meter in the industry. SRM uses a 144-point calibration procedure to ensure the very best accuracy of plus/minus one-percent. This high level of accuracy makes the SRM Power Meter system ideal for competitive cyclists seeking a high level of insight into their riding performance for upcoming races. Another benefit to the system, SRM's Power Meter handles the widest range of conditions, from freezing temperatures to searing heat, as well as withstanding outside moisture with its sealed design. Exceptional 3000-hour battery life means you won't have to worry about replacing the battery for years to come. ANT+ compatibility wirelessly feeds data to your head unit as you push down the road at a blistering cadence. It's backed by SRM's limited lifetime warranty on structural and electronic components, giving you added peace of mind for your power meter investment.
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$999.99
Stages Cycling 30mm Spindle Stages Cycling 30mm Spindle
Regardless of how efficient and easy to use Stages Cycling makes its power meters, they're useless unless you can connect them to your existing crank arm. Stages' 30mm Spindle bridges that gap by spanning your bottom bracket, attaching the non-drive, power meter-equipped Stages carbon crank arm to your existing driveside crank.
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$70.00
Stages Cycling Campagnolo Chorus Single Leg Power Meter Crank Arm Stages Cycling Campagnolo Chorus Single Leg Power Meter Crank Arm
Chain rings whispering, tires humming, derailleurs clacking up and down the cassette, salty old crit dogs growling at the enthusiastic youth who take erratic lines through corners--there's nothing quite like the chorus of a peloton. Though it's silent, power monitoring has become another ever-present element of that chorus, and the Stages Cycling Campagnolo Chorus Single leg Power Meter Crank Arm invites any stock Chorus crankset to sing along. The crank arm is a stock Campy offering: foam core carbon and Italian bearings that are on par with every other major brand's top crankset offerings. Italian engineering aside, the real star here is the little pod clinging to the inside of the crank arm. Tucked inside that little pod, strain gauges and an accelerometer measure force and rotations to deliver power data to your head unit with a claimed accuracy of +/-2%, which is in-line with other quality power meters on the market. It also incorporates Stage's Active Temperature Compensation (ATC), which compensates for the natural expansion and contraction of the strain gauges by adjusting the readings depending on external temperature. ATC accounts for those temperature changes without requiring you to stop pedaling in order to zero the system. Overall, the power meter adds less than 20g to the crank, which is a tiny tradeoff for the ability to chart limits, plan training regimes, and monitor efforts on race day.
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$699.99
Stages Cycling Campagnolo Super Record Single Leg Power Meter Crank Arm Stages Cycling Campagnolo Super Record Single Leg Power Meter Crank Arm
Simplicity's not a word that we'd typically associate with a power meter, and we definitely never thought we'd use it to describe anything Super Record. But--counting the top line--we've already used it twice to introduce the Stages Cycling Campagnolo Super Record Single Leg Power Meter Crank Arm. The unit's also modular, as swapping it between bikes only requires that you swap the crankset over or just the left crank arm. The result is reliable power measurement incorporating two different technologies--Stages power measuring and the three C's (Campy, carbon, and ceramic) of Italian cycling--that have won all three of the most recent Tours. Carbon and ceramic bearings aside for now, rest assured that the crank arm the meter's attached to is the same harpoon that Il Squallo used to skewer the competition in 2014. The real story here is with the meter itself, though, and the technology housed within that innocuous little cartridge is responsible for the numbers that Froome and company ride tempo to. Tucked inside that little pod, strain gauges and an accelerometer measure force and rotations to deliver power data to your head unit with a claimed accuracy of +/-2%, which is in-line with other quality power meters on the market. It also incorporates Stage's Active Temperature Compensation (ATC), which compensates for the natural expansion and contraction of the strain gauges by adjusting the readings depending on external temperature. ATC accounts for those temperature changes without requiring you to stop pedaling in order to zero the system. Overall, the power meter adds less than 20g to the crank, which is a tiny tradeoff for the ability to chart limits, plan training regimes, and monitor efforts on race day.
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$949.99
Stages Cycling Cannondale Hollowgram SI Single Leg Power Meter Crank Arm Stages Cycling Cannondale Hollowgram SI Single Leg Power Meter Crank Arm
With all the focus on power meters for the big three component brands, it's easy for your trusty Cannondale's Hollowgram crankset to get lost in the discussion. Stages Cycling is here to make sure you feel included and have access to power without giving up your crankset choice with its Cannondale Hollowgram SI Single Leg Power Meter Crank Arm. Well known for providing accurate single-leg power readings, Stages meters let you maintain the continuity of your crankset and gather necessary training data at a fraction of the cost seen with dual-leg systems. The difference between your current left crank arm and this one is the little power meter pod affixed to its inner face, which adds the ability to gather pinpoint power data to better measure your ride. It utilizes a blend of strain gauges and an accelerometer to map position and force data 64 times per second and deliver power readings with a claimed +/-2% accuracy that's right in line with what we'd expect from any quality power meter. For the gram-conscious racers out there, the Stages power meter adds a miniscule 20 grams to the crank arm, which is a tiny concession when gaining the massive data tracking and training specificity having a power meter affords. To put that in perspective, choosing the smaller safety pins the next time you don a race number should easily balance things out.
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$579.99
Stages Cycling Carbon Single Leg Power Meter Crank Arm - FSA 386EVO Stages Cycling Carbon Single Leg Power Meter Crank Arm - FSA 386EVO
It's a common conundrum--you have a carbon crankset and want power, but your bank account isn't having anything to do with the price tag that accompanies a dual-leg, built-in power meter carbon crankset. The good news is that the engineers at Stages Cycling have created their own FSA 386EVO Carbon Single Leg Power Meter Crank Arm, so you can get the power data you need without replacing your entire crankset. While this may not be exactly the same left crank arm as your current FSA one, the only immediately apparent differences are the Stages branding and the small power meter pod affixed to the arm's inner surface, adding the ability to gather pinpoint power data to better measure your ride. It utilizes a blend of strain gauges and an accelerometer to gather position and force data 64 times per second and deliver power readings with a claimed +/- 2% accuracy that's right in line with what we'd expect from any quality power meter. For the gram counters among us, the Stages power meter adds a miniscule 20 grams to the crank arm, which is a tiny sacrifice to gain the data tracking and training specificity having a power meter affords.
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$629.99
Stages Cycling Carbon Single Leg Power Meter Crank Arm for Race Face Next SL Stages Cycling Carbon Single Leg Power Meter Crank Arm for Race Face Next SL
You wouldn't choose anything over your Race Face Next SL crankset, but you'd really like to add power data and dial in your training plan. Enter the Stages Cycling Carbon Single Leg Power Meter Crank Arm for Race Face Next SL. Pairing single-leg power measurement with efficient power transfer, this left crank arm transforms your crankset into a vital training tool with accurate power measurement no matter where the ride takes you. Stages manufactures this crank arm, so it isn't exactly the same arm as your current Race Face one, but the only obvious differences are the Stages branding and the small power meter pod affixed to the arm's inner surface, adding the ability to gather pinpoint power data to better measure your ride. It utilizes a blend of strain gauges and an accelerometer to gather position and force data 64 times per second and deliver power readings with a claimed +/-2% accuracy that's right in line with what we'd expect from any quality power meter. The gram counters among us will also appreciate that the Stages power meter adds a paltry 20 grams to the crank arm, which is a tiny sacrifice to gain the data tracking and training specificity having a power meter affords.
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$699.99
Stages Cycling Carbon Single Leg Power Meter Crank Arm for SRAM Mountain Cranks - BB30 Stages Cycling Carbon Single Leg Power Meter Crank Arm for SRAM Mountain Cranks - BB30
You've been spending a lot of time on the trail lately and your training app is having a hard time dealing with the lack of power data on days you're off-road, so it's time to get the full picture with a BB30 Stages Cycling Carbon Single Leg Power Meter Crank Arm. Designed to pair with 2015 SRAM mountain cranks, this left crank arm maintains the efficient power transfer you expect from carbon cranks and adds accurate power measurement to more effectively track your training. Stages manufactures this crank arm, so it isn't exactly the same arm as your current SRAM one, but the only obvious differences are the Stages branding and the small power meter pod affixed to the arm's inner surface, adding the ability to gather pinpoint power data to better measure your ride. It utilizes a blend of strain gauges and an accelerometer to gather position and force data 64 times per second and deliver power readings with a claimed +/-2% accuracy that's right in line with what we'd expect from any quality power meter. The gram-conscious XC racers among us will also appreciate that the Stages power meter adds a paltry 20 grams to the crank arm, which is a tiny sacrifice to gain the data tracking and training specificity having a power meter affords.
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$699.99
Stages Cycling Carbon Single Leg Power Meter Crank Arm for SRAM Red - BB30 Stages Cycling Carbon Single Leg Power Meter Crank Arm for SRAM Red - BB30
You love your SRAM Red 22 drivetrain and its lightweight efficiency, but its one downfall is its inability to measure power--and upgrading to a dual-leg, integrated power meter crankset just isn't in the budget. Which is why we're stoked to have options like the BB30 Stages Carbon Single Leg Power Meter Crank Arm for SRAM Red. It packs a heap of training utility into a price point that won't crush an annual cycling equipment budget. Because it's made by Stages, this isn't exactly the same left crank arm as your current SRAM Red arm, but the only immediately apparent differences are the Stages branding and the small power meter pod affixed to the arm's inner surface, which adds the ability to gather pinpoint power data to better measure your ride. It utilizes a blend of strain gauges and an accelerometer to chart position and force data 64 times per second and deliver power readings with a claimed +/-2% accuracy that's right in line with what we'd expect from any quality power meter. The weight-conscious riders among us will also appreciate that the Stages power meter adds a paltry 20 grams to the crank arm, which is a tiny sacrifice to gain the data tracking and training specificity having a power meter affords.
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$699.99
Stages Cycling Carbon Single Leg Power Meter MTB Crank Arm - GXP Stages Cycling Carbon Single Leg Power Meter MTB Crank Arm - GXP
Seeing that power meters have exploded in popularity on the road, it was only a matter of time before mountain bikers adopted this same technology to assess their strengths and weaknesses. Catering to these data-inquisitive trail riders, the Stages Cycling Carbon Single Leg Power Meter MTB GXP Crank Arm measures and relays a host of insightful metrics as you muscle up root-laden climbs and pedal along undulating XC loops. As one of the more affordable power meters on the market, it's a great foray into translating rider output into usable data for gaining efficiency and speed--all while leaving some loot for race-day fees and upgraded components. The power meter is neatly tucked away in a low-profile fashion along the non-drive side, preventing it from bashing its guts out on rocks and gnarled root sections. It's compatible with many of SRAM's GXP Cranks with Q-factors of 168 millimeters. Carbon construction makes it ridiculously lightweight and incredibly stiff, so you can surge forward with every pedal stroke to maximize efficiency. Best of all, the meter itself only adds a scant 20 grams to the base of the crank arm, so you'll barely even notice it's there. Looking into the details of the meter itself, +/- 2% accuracy sits right in line with industry standards, meaning it'll please all but the most discerning of data geeks. Active Temperature compensation prevents skewed readings when conditions widely fluctuate on the trail, especially in alpine environments. For simplicity, the accelerometer-based cadence measurement doesn't require additional sensors. Bluetooth Smart and ANT+ capabilities wirelessly sync with your favorite cycling apps, so you won't have to deal with pesky cables while uploading data. For even greater analysis and control, Stages Cycling developed an app that identifies and updates firmware, zero resets the meter, provides quick read-outs of power output, and checks remaining battery life.
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$629.99
Stages Cycling Carbon Single Leg Power Meter Road Crank Arm - GXP Stages Cycling Carbon Single Leg Power Meter Road Crank Arm - GXP
Dual-leg power meters are always going to be the gold standard of measurement, but not all of us have four-figures of cash burning a hole in our pockets to drop on a single piece of equipment. For those of us not conducting lab research, single-leg power is the ticket to affordable data to get the most out of our training and Stages Cycling is leading the way. Its Carbon Single Leg Power Meter GXP Road Crank Arm is made in-house and extensively tested for accuracy to provide a cost-effective option for adding power to your existing SRAM GXP carbon crankset.While this may not be exactly the same crank as your current SRAM one, we've spent some time with it and would be hard pressed to see the differences outside of the Stages branding. The one obvious difference is the most important though--this crank has a power meter pod affixed to its inner face, adding the ability to gather pinpoint power data to better measure your ride. It utilizes a blend of strain gauges and an accelerometer to gather position and force data 64 times per second and deliver power readings with a claimed +/- 2% accuracy that's right in line with what we'd expect from any quality power meter. For the gram conscious cyclists out there, the Stages power meter adds a miniscule 20 grams to the crank arm, which is a tiny concession when gaining the massive data tracking and training specificity having a power meter affords. To put it in perspective, that's less than an extra gel in your pocket, and closer to the weight of the six safety pins you use to pin on your race number every weekend.
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$629.99
Stages Cycling Shimano Dura-Ace R9100 Single Leg Power Meter Crank Arm Stages Cycling Shimano Dura-Ace R9100 Single Leg Power Meter Crank Arm
Upgrading to that shiny new Dura-Ace 9100 groupset was a winter milestone that took your ride to the next level, and after spending some time with it you're starting to regret not adding a power meter to the setup to get the most out of those limited training hours. Let's be honest though, the reason you didn't get that fully matching, power-reading crankset in the first place is the wallet-crunching cost of a dual-leg, crank-based meter. But now, thanks to Stages Cycling and its Shimano Dura-Ace R9100 Single Leg Power Meter Crank Arm, you can keep that sleek 9100 aesthetic and add accurate power measurement for a fraction of the cost. The crank arm itself is the same as the non-power Dura-Ace 9100 left arm on your bike right now, just with a Stages power meter affixed to its inner surface. Tucked inside this little pod, strain gauges and an accelerometer measure force and rotations to deliver power data to your head unit with a claimed accuracy of +/- 2%, which is in-line with other quality power meters on the market. The meter also incorporates Stage's Active Temperature Compensation (ATC), which compensates for the natural expansion and contraction of the strain gauges by adjusting the readings depending on external temperature. ATC accounts for those temperature changes without requiring you to stop pedaling in order to zero the system. Overall, the power meter adds less than 20g to the crank, which is a tiny tradeoff for its ability to capture power information as it transfers from the pedals into the drivetrain.
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$649.99
Stages Cycling Shimano Ultegra 6800 Single Leg Power Meter Crank Arm Stages Cycling Shimano Ultegra 6800 Single Leg Power Meter Crank Arm
Maintaining a healthy balance between work, life, and cycling often leaves us more than a little crimped on training time, and haphazardly guiding those precious hours by finicky heart rate data just isn't cutting it anymore. It's time to step up the quality of your training time and swap out your standard Ultegra 6800 left crank arm for a Stages Cycling Shimano Ultegra 6800 Single Leg Power Meter Crank Arm. With a price point that pales in comparison to dual-leg systems, this meter measures power transfer through the left crank to deliver accurate, reliable power data while leaving some cash in the bank for recovery nutrition and mid-ride snacks.The key behind this crank arm is the little power meter pod affixed to its inner face, which takes what originally was a standard Ultegra 6800 crank arm to the next level and adds the ability to gather pinpoint power data to better measure your ride. It utilizes a blend of strain gauges and an accelerometer to gather position and force data 64 times per second and deliver power readings with a claimed +/- 2% accuracy that's right in line with what we'd expect from any quality power meter. For the gram counters out there, the Stages meter adds a miniscule 20 grams to the crank arm, which is a tiny concession to gain the massive data tracking and training specificity having a power meter affords. To put it in perspective, choosing the smaller safety pins the next time you don a race number should easily balance things out.
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$579.99
Stages Cycling Shimano XT M8000 Single Leg Power Meter Crank Arm Stages Cycling Shimano XT M8000 Single Leg Power Meter Crank Arm
As power meters see a surge in popularity within the realm of road cycling and racing, it's not difficult to imagine the need for mountain bike racers seeking a similar wealth of power-derived data. Fulfilling this need for mountain bikers engaging in everything from cross-country to enduro, the Stages Cycling Shimano XT M8000 Single Leg Power Meter Crank Arm provides the rider with a ton of insightful data while standing up to the rigors of technical terrain. Better yet, it's offered at an attractive price that's substantially cheaper than the competition, meaning you'll have some extra loot to spend on component upgrades and race-day fees. Neatly concealing its ANT+ and Bluetooth Smart-equipped sensor, the low-profile sensor housing prevents it from bashing its guts out on rocks and gnarled root sections. For weight-conscious riders, it's only 20 grams heavier than the original crank, so you'll barely feel it on the trail. And seeing that regular thrashings are expected on the trails, the crank arm's cold-forged aluminum construction withstands regular beatings without giving you grief the moment you hit rocks or snag over impediments. Delving into the power meter itself, +/- 2% accuracy sits right in line with industry standards, meaning it'll please all but the most discerning of racers and riders. Active Temperature compensation prevents skewed readings when conditions rapidly change on the trail. For simplicity, the accelerometer-based cadence measurement doesn't require additional sensors. Bluetooth Smart and ANT+ capabilities wirelessly sync with your favorite cycling apps, so you won't have to deal with pesky cables while uploading data. For even greater analysis and control, Stages Cycling developed an app that identifies and updates firmware, zero resets the meter, provides quick read-outs of power output, and checks remaining battery life.
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$579.99
Stages Cycling Shimano XTR M9000 Race Single Leg Power Meter Crank Arm Stages Cycling Shimano XTR M9000 Race Single Leg Power Meter Crank Arm
As power meters become ubiquitous with successful road racers, XC racers are readily adapting their training regimens and race efforts with this effective tool. When you're ready to leverage power data for improved training and quicker race times, pick up the Stages Cycling Shimano XTR M9000 Race Single Leg Power Meter Crank Arm. Offered at a lower price than much of the competition, this single-leg, power meter crank arm is a great way to enter the world of power meters--all while saving some loot for race fees and future upgrades. Equipped with a low-profile housing that neatly conceals the ANT+ and Bluetooth Smart power sensor, the XTR M9000 Race power meter left crank arm adds a scant 20 grams over a standard Shimano XTR M9000 Race Crank. Hollowtech II construction provides an optimal balance of stiffness, strength, and weight savings for dedicated XC racers. The narrow 158-millimeter Q-factor is beneficial for those seeking an increase in pedaling efficiency. Please note, this narrow Q-factor isn't compatible with some full-suspension designs, due to chainstay clearance. The power meter itself boasts an accuracy of +/- 2%, which meets industry standards to satisfy all but the most discerning of data geeks. Active Temperature compensation prevents skewed readings from rapid temperature swings. For simplicity, the accelerometer-based cadence measurement doesn't require any additional sensors. Bluetooth Smart and ANT+ capabilities sync with your favorite cycling apps, wirelessly uploading ride data without dealing with pesky cables. For greater control of the meter, there's an app developed by Stages Cycling. This useful app identifies new firmware to perform wireless updates, zero resets the meter, provides quick read-outs of power output, and checks remaining battery life.
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$649.99
Stages Cycling Shimano XTR M9020 Trail Single Leg Power Meter Crank Arm Stages Cycling Shimano XTR M9020 Trail Single Leg Power Meter Crank Arm
Power meters are quickly becoming ubiquitous with successful road racers seeking to quantify training and race-day efforts into a wealth of useful data. However, this success is no longer confined to the road, with many XC racers seeking the same data. Upgrade your XC whip with the Stages Cycling XTR 9020 Trail Single Leg Power Meter Crank Arm when you're ready to leverage insightful power data to improve your training and race-day efforts. Offered at an attractive price that leaves spare cash for race fees and future upgrades, this single-leg, power meter crank arm is an excellent choice for improving your physical performance and identifying weak spots across different courses and terrain types. The low-profile sensor housing neatly conceals the ANT+ and Bluetooth Smart power sensor, preventing it from bashing on rocks or adding much in the way of weight. It's only 20 grams heavier than a regular Shimano XTR M9020 Trail Crank, so you'll barely even notice it on the trail. Cold-forged aluminum construction is more durable than its XTR M9000 Race counterpart, meaning you'll have extra peace of mind across rugged trails. Looking at the power meter itself, +/- 2% accuracy sits right in line with industry standards, meaning it'll please all but the most discerning of racers and riders. Active Temperature compensation prevents skewed readings when conditions rapidly change on the trail. For simplicity, the accelerometer-based cadence measurement doesn't require additional sensors. Bluetooth Smart and ANT+ capabilities sync with your favorite cycling apps, wirelessly uploading ride data without dealing with pesky cables. Also, there's an app developed by Stages Cycling, which identifies and updates firmware, zero resets the meter, provides quick read-outs of power output, and checks battery levels.
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$649.99


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