(Drive Side)
Factory Install
(installed on your crank)

$299.99 USD

Select Compatible Cranksets

Product Details


Ridden by the pros, PRECISION PRO dual-side power meters deliver all the benefits of our left-side model (exceptional accuracy, lightweight design, ANT+ and Bluetooth compatibility, 3D power meter 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 Upgrade Factory Install is installed on your existing crank at our factory.

Factory Install crank compatibility list (pdf)

More Details

In Depth


  • 3D power meter technology (patent pending) measures tri-axial strain on your crank
  • 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
  • Over-the-air upgrade capability for adding new features and updates


  • Weight: 25 grams
  • Data accuracy: +/- 1% error margin
  • Battery life: 100+ hours on 2032 coin cell battery
  • Battery status indicator: Alert at 15% battery power


Software & Documentation

How does it work?

We install PRECISION PRO on your existing crankset. You send us your crankset, and we install the power meter and send it back to you. Please note, new orders take approximately three to four weeks to be processed. We’ll be in touch via email to keep you posted on the status of your order.

For customers outside of Canada and the USA orders will be subject to applicable VAT and duties.

If you have PRECISION Gen 1 you will need to send both your left and right cranks. Your Gen 1 PRECISION will be upgraded to a Gen 2 PRECISION as part of the Factory Install process. PRECISION Gen 1

If you have PRECISION Gen 2 you will send only your right crank. PRECISION Gen 2

Or check out our PRECISION LEFT-SIDE Factory Install or PRECISION LEFT-SIDE Ride Ready for more crank options for single-side power meters.

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

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

  • Ambit3 Sport (Bluetooth)