This page contains our crank arm power meters for road bikes. Along with pedals, crank arm-based power meters are one of the most popular power meter types. They are affordable, easy to install and models are available for most cranksets. In addition, you can find a crank arm power meter to fit virtually any crankset.
Additional Crank Arm Power Meters for Road Info:
Brands
We carry road crank arm power meters from 4iiii Innovations and Stages Cycling.
Check Frame Compatibility
Before purchasing, you should confirm compatibly with your frame. On some bikes, there is not enough room between the left crank arm and the chainstay for the sensor to clear the frame. Therefore, you should make sure you have at least 10 mm of clearance for Stages and 4iiii PRECISION 2 power meters and 8 mm of clearance for 4iiii PRECISION 3 power meters. Also, make sure that you don’t have a bottom bracket mounted rear brake (used on some aero and TT bikes). Please refer to the image below.
Quick Product Comparison:
Price
While 4iiii and Stages make road crank arm power meters for different cranksets, in general 4iiii PRECISION 2 power meters are the lower cost option. On average, they are about 8-10% cheaper than Stages models. However, 4iiii’s newest PRECISION 3 models are priced slightly above the Stages models. On average, they are about 3% more. Once 4iiii discontinues the PRECISION 2, cost will favor Stages, ever-so-slightly.
Models
4iiii offers road crank arms for Shimano cranksets. Stages on the other hand, makes crank arms for Shimano, Campagnolo, FSA, Cannondale, SRAM, Easton and Specialized cranksets.
In addition, both companies make left crank arms (which are the power meters on this page), as well as complete cranksets that measure both left and right leg power. The complete cranksets can be found on our Cranksets page.
Installation
All these power meters install the same way. You simply remove your current, left-side crank arm power meter and replace it with your new, power-equipped version. Installation typically takes about 5-10 minutes for most models.
The one exception to this is the Stages Carbon for SRAM BB30 Power Meter, which also requires that you replace the spindle. Note that for Shimano models, you will also need a Shimano Crankarm Cap Tool (sold by us separately).
Power Measurement
All these left side crank arm road power meters measure power from the left leg and double the value in order to determine total power. This method of power calculation assumes that both legs are producing the same power.
ANT+/Bluetooth SMART
All of these power meters are dual ANT+ and Bluetooth SMART compatible.
Batteries
4iiii and Stages power meters use CR2032 batteries. 4iiii PRECISION 2 models offer 100 hours of battery life, while the PRECISION 3 gets a whopping 800 hours. Stages models get about 200 hours.
Weight
Crank arm power meters for road bikes are one of the lightest power meters you can buy. The 4iiii adds a mere 7.5-9 grams (based on the model) to your bike. The Stages adds 20 grams, which is still very light.
-
4iiii’s PRECISION 3+ power meter on a Shimano 12-Speed DURA-ACE R9200 crank arm
-
Stages Cycling performance on Shimano's best-selling R8000 crank arm This product has been discontinued. However, we have the 4iiii PRECISION 3+ Shimano Ultegra R8000 Power Meter in stock!
-
Stages Cycling performance on Shimano's best-selling R8100 crank arm This product has been discontinued. However, we have the 4iiii PRECISION 3+ Shimano Ultegra R8100 Power Meter in stock!
-
Stages Carbon for FSA 386 EVO Power Meter
Original price was: $559.99.$447.99Current price is: $447.99.Bringing Stages power to carbon FSA 386 EVO cranks! Please see our note below on Stages Rider Support -
Stages Carbon for SRAM BB30 Power Meter
$447.99 – $507.98Made specifically to work with SRAM, Easton and Race Face cranksets Please see our note below on Stages Rider Support -
The Stages Shimano 105 R7000 offers Stages performance at a great value! This product has been discontinued. However, we have the 4iiii PRECISION 3+ Shimano R7000 Power Meter in stock!
-
Stages Carbon GXP for SRAM Road Power Meter
Original price was: $559.99.$447.99Current price is: $447.99.Made specifically to work with SRAM GXP road cranks Please see our note below on Stages Rider Support -
Stages Cannondale Hollowgram Si Power Meter
Original price was: $409.99.$327.99Current price is: $327.99.Stages power for your Cannondale Hollowgram Si crank! Please see our note below on Stages Rider Support -
Stages FSA SL-K BB30 Power Meter
Original price was: $559.99.$391.99Current price is: $391.99.Award winning Stages power for FSA and Vision BB30 cranks Please see our note below on Stages Rider Support -
The Stages Shimano GRX RX810 brings Stages power to your gravel bike! This product has been discontinued. However, we have the 4iiii PRECISION 3+ Shimano GRX RX810 Power Meter in…
-
Stages Cycling performance on Shimano’s top-end DA9200 crank arm! This product has been discontinued. However, we have the 4iiii PRECISION 3+ Shimano DURA-ACE 9200 Power Meter in stock!
-
Stages Carbon Campagnolo Super Record Power Meter 11S
Original price was: $849.99.$637.49Current price is: $637.49.Stages power on Campagnolo's top of the line Super Record crank arm! Please see our note below on Stages Rider Support -
Stages Carbon Campagnolo Super Record Power Meter 12S
Original price was: $924.99.$693.74Current price is: $693.74.Stages power on Campagnolo's top of the line Super Record crank arm! Please see our note below on Stages Rider Support -
Stages Shimano Ultegra R8000 Right Side Power Meter
Original price was: $494.99.$395.99Current price is: $395.99.Stages power on a Shimano Ultegra R8000 right side crank arm Please see our note below on Stages Rider Support