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4iiii Precision 105 R7000 Left Hand Power Meter Crank


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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 105 R7000 Left Hand Power Meter Crank

4iiii Precision 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, this crank arm is a valuable tool for monitoring performance and helping you push yourself to the next level. 

Compatible with ANT+ and Bluetooth devices. Single non-driveside Shimano 105 R7000 crank arm supplied with 4iiii Precision coin battery powered unit installed. Easy to fit yourself and the calibration process is simple.


  • 3D power meter technology measures tri-axial strain on crank arm
  • Accurate, consistent data
  • Lightweight, compact design
  • Battery status indicator via 4iiii app
  • Compatible with ANT+, Bluetooth devices
  • User-friendly app and configurable rider compensation scale factor
  • Easy setup and maintenance
  • Over-the-air upgrade capability for adding new features and updates


  • Crank: Shimano 105 R7000 Alloy
  • Data accuracy: +/- 1% error margin
  • Battery life: 100+ hours on 2032 coin cell battery
  • Battery status indicator: Alert at 15% battery power
  • Check your frame clearance before you order by downloading and printing the compatibility guide here.