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4iiii Precision Pro Dual Dura-Ace 9100 Power Meter Crank Set


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4iiii develop products to improve sports performance at a competitive and professional level. Their products deliver accurate data seamlessly to help you train to win.
4iiii Precision Pro Dual Dura-Ace 9100 Power Meter Crank Set

4iiii Precision Pro Power Meter cranks are a highly accurate, reliable, durable and lightweight way of measuring your power and cadence during training or competition. With the capacity to measure tri-axial strain on your crank arm, the accuracy of the power readings is second to none.

Whether you're a professional or a person who wants to train harder, these cranks are a valuable tool for monitoring performance and helping you push yourself to the next level.

Compatible with ANT+ and Bluetooth devices. This complete Shimano Dura-Ace FCR9100 crank set is supplied with the 4iiii Precision Pro units ready installed. The dual sided option gives you the benefit of a specific breakdown of left and right wattage. Easy to fit yourself and the calibration process is simple too.


  • 3D power meter technology 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 (power meter only)
  • Data accuracy: +/- 1% error margin
  • Battery life: 100+ hours on 2032 coin cell battery
  • Battery status indicator: Alert at 15% battery power