4iiii Precision XTR M9020 Powermeter

The ideal training companion for the podium-chasing rider, this left-arm model is compatible with Shimano XTR M9020 cranksets and provides immediate cadence and power data to keep you riding at your peak at all times. Transmitting the info to your onboard computer or smartphone via ANT+ and Bluetooth connectivity, this lightweight unit gives readings to within +/-1%, making sure every pedal stroke is as effective as can be. 

IPX7 waterproof rated and equipped with 100+ hours of Lithium Ion battery life, the Precision is a phenomenal way to gauge your riding gains.