4iiii Innovations Precision Ride Ready Powermeter (Left Side only): Black

4iiii Innovations

360.00 $ 399.00
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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). which will fit bottom brackets using the Hollowtech II interface.


  • Precision Ride Ready power meter comes installed on a new Shimano left side crank arm, simply choose the correct Shimano model
  • 3D powermeter technology (patent pending) measures tri-axial strain on your crank arm to provide accurate consistent data
  • Left sided, compact design, extremely lightweight (9g)
  • 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
  • Waterproof and works in all temperatures

NOTE: 4iiii's rule of thumb for frame to crank clearance, there needs to be the width of a AAA battery between the crank arm and the frame


  • Model: Shimano 105 5800
  • Interface (BB): Hollowtech ll
  • Length: 165mm
  • Data Accuracy: +/- 1% error margin
  • Battery Life: 100+ riding hours on 2032 coin cell battery
  • Weight: 9 grams

Software & Documentation