If you're looking for the most cost effective way to get
superbly accurate power measurement, this is it.
+/-1.5% accuracy, tested on Specialized's "win mill" and
validated by the Locomotion Lab in Boulder, Colorado.
This power crank simply replaces your left (non-drive-side)
Ultegra crank. It'll work happily with ANT+ and Bluetooth devices,
and Specialized's Power app, available for iOS and Android, makes
setup and diagnostics a doddle.
A single-sided solution like this won't provide quite the depth
of information that a dual-sided solution offers, but then again
it's an extremely quick, easy and economical way to get into power
- Shimano Ultegra 8000 generation crank arm
- Note: Right crank arm and spider are NOT included!