The Ultegra 6800 Stages Power meter fits all styles of 6800 crankset, including compact and standard. Riders looking to add power to their existing crank need only to match the crank length of their existing Ultegra 6800 crank.
 
SPECIFICATIONS
Accuracy: ± 2%
Weight: Only adds 20gr to base crank arm
Battery Life: 200+ hours (coin cell: CR2032)
Power range (Watts): 0 to 2500
Cadence range (rpm): 20-220
Crank Compatibility: All Shimano Hollowtech II road cranks
Device Compatibility: ANT+, Bluetooth Smart Ready
Software Compatibiity: Training Peaks, Strava, Garmin Training Center and others
 
ADDITIONAL FEATURES
Tool free battery replacement
Active temperature compensation
Accelerometer based cadence measurement
Wireless firmware upgrades