4iiii Dura Ace 9100 Crank Arm W/precision Power Meter Black Left Sided

Durable, lightweight and incredibly precise, the 4iiii Dura Ace 9100 Crank Arm w/PRECISION Power Meter Black Left Sided measures tri-axial strain to get a 3D view of where the power is going. Whether you’re a pro or simply training hard, PRECISION powermeters deliver industry-leading accuracy, highly dependable cadence data, 3D powermeter technology capable of measuring tri-axial strain on your crank arm. Designed to be durable and lightweight, compatible with  ANT+ and Bluetooth head units, PRECISION helps you train harder and smarter.   PRECISION Ride Ready comes installed on a new Shimano Dura Ace left crank arm. These crank arms will fit bottom brackets using the Hollowtech II interface.   NOTE: check your frame clearance before ordering by downloading and printing the compatibility guide:https://4iiii.com/wp-content/uploads/2017/02/Ride-Ready-Clearance-Check-Letter-20170215.pdf   Features 3D powermeter technology (patent pending) measures tri-axial strain on your crank arm Accurate, consistent data Lightweight, compact design Battery status indicator via 4iiii app Compatible with ANT+, Bluetooth Smart head units, smartphones, and other 4iiii products User-friendly app and configurable rider compensation scale factor Easy setup and maintenance Specifications Weight: 9 grams Data accuracy: +/- 1% error margin Battery life: 100+ riding hours on 2032 coin cell battery Display Compatibility Android Apps CateEye Cycling Endomondo Strava Wahoo Fitness: Workout Tracker plus other apps supporting Bluetooth Smart/LE bike power devices CATEYE Stealth evo+ Stealth 50 Strada Smart Padrone Smart Padrone Smart+ Garmin Edge 500 Edge 510 Edge 520 Edge 800 Edge 810 Edge 820 Edge 1000 Edge Explore 1000 epix Forerunner 310XT Forerunner 910XT Forerunner 920XT fenix 2 fenix 3 fenix 3 HR Polar M450 V800 BTLE Please note: the Polar V650 is not compatible  Suunto Ambit3 Sport (Bluetooth) iOS Apps CatEye Cycling Endomondo Strava TrainerRoad Wahoo Fitness: Workout Tracker plus other apps supporting Bluetooth Smart/LE bike power devices