**picture being used is for the 172.5mm length**
The Stages Power meter is built on to a non-drive FC-6800 crank arm specifically to pair with Shimano's Ultegra 6800 crank.
The new Stages Power meter is slimmer, and up to 28-percent lower profile than our original meter. It's sleeker by way of a 17-percent reduction in frontal area, and we've also made it stronger. The new housing design increases the strength of the battery door and housing connection by 200-percent over the previous design.
This Shimano Ultegra 6800 Stages Power meter is compatible with all Shimano Hollowtech II road drivetrains.
Accuracy: ± 2%
Power meter housing: new low profile design, with new door interface
Weight: Only adds 20g to base crank arm
Battery Life: 200+ hours (coin cell: CR2032)
Power range (Watts): 0 to 2500
Cadence range (rpm): 20-220
Water resistance rating: IPX7
Frame Compatibility: Most frames, see fit guide in our Support section
Device Compatibility: ANT+, Bluetooth Smart Ready Software Compatibility: Training Peaks, Strava, Garmin Training Center and others
ALSO AVAILABLE AS A COMPLETE CRANKSET WTIH POWER METER
Tool free battery replacement
Active temperature compensation
Accelerometer based cadence measurement
Wireless firmware upgrades