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 left crank arm (105, Ultegra, or Dura-Ace). These crank arms will fit bottom brackets using the Hollowtech ii interface.

4iiii PRECISION Shimano R7000 (105)

  • 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


    • Weight: 9 grams
    • Data accuracy: +/- 1% error margin
    • Battery life: 100+ riding hours on 2032 coin cell battery


    Software & Documentation

    How does it work?

    Choose the  Shimano left crank arm you want at checkout, and you’ll receive it with PRECISION installed.

    Orders shipped outside of Canada and USA are subject to VAT and Duty.


    Display Compatibility

    Android Apps
    • CateEye Cycling
    • Endomondo
    • Strava
    • Wahoo Fitness: Workout Tracker
    • plus other apps supporting Bluetooth Smart/LE bike power devices
    • Stealth evo+
    • Stealth 50
    • Strada Smart
    • Padrone Smart
    • Padrone Smart+
    • 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

    • Ambit3 Sport (Bluetooth)

    iOS Apps

    • CatEye Cycling
    • Endomondo
    • Strava
    • TrainerRoad
    • Wahoo Fitness: Workout Tracker
    • plus other apps supporting Bluetooth Smart/LE bike power devices

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