For Dura-Ace 7900 riders we offer a Stages Power meter as a replacement for existing 7900 non-drive crank arms. Riders looking to add power to their existing crank need only select length, as the Stages Power meter (Dura-Ace 7900) fits all styles of 7900 crankset, including: compact and standard. For those riders looking to replace an entire existing crankset should look to the Shimano Dura-Ace 9000 model, which works with existing Dura-Ace 7900 mechanical and Di2 electronic 10-speed group sets; a CN-9000 chain is recommended.


Specifications:

- Accuracy: ± 2%
- Weight: Only adds 20gr to base crank arm
- Battery life: 200+ hours (coin cell: CR2032)
- Tool free battery replacement
- Active temperature compensation
- Accelerometer based cadence measurement
- Wireless firmware upgrades
- Power range (Watts): 0 to 1999
- Cadence range (rpm): 30-220
- Frame compatibility: Most frames, see fit guide in our Support section
- Crank Compatibility: all Shimano Hollowtech II road cranks
- evice compatibility: ANT+, Bluetooth Smart Ready
- Software compatibility: Training Peaks, Strava, Garmin Training Center and others

Please allow 4 to 6 weeks for delivery of this product