The Stages Power Dura-Ace 7900 is the power meter for all riders who are on a Shimano Dura-Ace 7900/7950 crankset. The Stages Power is pre-assembled on a Dura-Ace 7900 left crankarm. It replaces the existing left crankarm which makes installation pretty simple. Due to the left crankarm interface there is no interference with the drivetrain components.
Riders only need to select length as the Stages Power meter Dura-Ace 7900 fits all styles of 7900 cranksets, including compact and standard. Via ANT+ and Bluetooth Smart technologies the Stages Power is compatible with all ANT+ cycling computers as well as with the latest smartphone models.
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
Device compatibility: ANT+, Bluetooth Smart Ready
Software compatibility: Training Peaks, Strava, Garmin Training Center and others
Length: 165mm, 167.5mm, 170mm, 172.5mm, 175mm, 177.5mm, 180mm