4iiii Precision Pro Ride Ready Dual PowerMeter (includes new Shimano Crankset)

4iiii Innovations



Ridden by the pros, PRECISION PRO Dual-Side Power Meters deliver all the benefits of the left-side model (exceptional accuracy, lightweight design, ANT+ and Bluetooth compatibility, 3D powermeter technology), plus a specific breakdown of left and right wattage. Perfect for those who need specific power output from each crank side, or anyone who simply wants the best power meter on the market.

The PRECISION PRO Ride Ready Power Meter comes installed on NEW Shimano Crank Arms, simply choose the Shimano model you want.


  • Dual sided configuration offers World Tour, professional grade data in order to train smarter
  • The next step forward in 3D patent pending power meter technology, measures tri-axial strain on your crank and provides accurate consistent data
  • Lightweight, compact design
  • Waterproof and works in all temperatures
  • 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
  • Over-the-air upgrade capability for adding new features and updates


  • Weight: 25 grams (power meter only)
  • Data Accuracy: Within +/- 1% error margin
  • Battery Life: 100+ hours on 2032 coin cell battery
  • Battery Status Indicator: Alert at 15% battery power

Shimano Crank Arm Specs

  • Model: Shimano Dura-Ace 9100
  • Speed: 2x11
  • BCD: 4x110mm
  • Interface (BB): Hollowtech II
  • Color: Black

Crank Display Compatibility

Android Apps

  • CatEye 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*

* These Garmin devices are recommended as they provide dual-related power metrics such as left/right balance percentage

iOS Apps

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


  • M450
  • V800 BTLE

Please note the Polar V650 is NOT compatible


  • Ambit3 Sport (Bluetooth)


Check your frame clearance before you order. (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)