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
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 other
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Nice bit of kit, and seems to provide good numbers. My only problem was pairing with Garmin Forerunner 310xt - it won't work properly when worn on the wrist, rather it has to be fixed to left handlebar (weak Ant+ chip in 310xt).
So neat and easy to fit. Reads similar to my other power meters on the turbo and more expensive one on my TT bike.Very cool.
Good product. Ten minutes to fit, easy to pair with Garmin 500. Power data seems to be accurate as similar readings to my Quarq.
Battery died after one ride BUT I have been experiencing battery failures in other power meters. Seems to be storing them in cold conditions that does it. Just pop the battery out after a ride and no issues.
Recommended - good value and neat power meter. Great service from Merlin.