Back to Website

Ride Ready (includes new crank arm)


Product Details

Whether you’re a pro or simply training hard, PRECISION power meters deliver industry-leading accuracy, highly dependable cadence data, 3D power meter 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 is 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.

NOTE - Check your frame clearance before you order by downloading and printing the compatibility guide:
Letter size paper (pdf)  |  A4 size paper (pdf)

  • Shimano Ultegra 6800 172.5mm
  • Shimano Ultegra 6800 175mm
  • Shimano DURA-ACE 9000 165mm
  • Shimano DURA-ACE 9000 170mm
  • Shimano DURA-ACE 9000 172.5mm
  • Shimano DURA-ACE 9000 175mm
For availability of other models email

More Details

Customer Reviews

Based on 4 reviews Write a review

In Depth


  • 3D power meter 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
  • Endomondo
  • Strava
  • Wahoo Fitness: Workout Tracker
  • plus other apps supporting Bluetooth Smart/LE bike power devices
  • Stealth evo+
  • 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
    • M450
    • V800 BTLE
    Please note: the Polar V650 is not compatible

    • Ambit3 Sport (Bluetooth)

    iOS Apps

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