4iiii Ultegra Powermeter


The 4iiii Precision Power Meter for Shimano Ultegra 6800 cranks is a pre-installed power meter on a Shimano Ultegra left hand crank arm. This allows you to simply replace your left-hand crank arm and you’re ready to ride.

Precision is the world’s lightest left side power meter, designed provide you with industry leading power accuracy with highly dependable cadence data, a light weight design, broad ANT+ and Bluetooth smart head unit compatibility and 3D power meter technology capable of measuring tri-axial strain on your crank.

Crank Length
Options Of:
– 170mm,
– 172.5mm,
– 175mm,
ANT+ and Bluetooth Smart head units along with Smartphones
Extra Features
– Easy set-up and maintenance
– Improved battery life and Battery status indicator (notification at 15% battery)
– Accurate, consistent data (+/- 1% error)
– User-friendly 4iiii app
– User configurable Rider Compensation Factor
– Improvements to saving zero offset and calibration values
– Over-the-air upgrade capability for adding new features and updates
9 grams on left crank
Uses a 2032 coin cell battery
(100+ hours battery life)