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Shimano GRX RX810 Precision 3 Left-Side Power Meter

1 out of 5 stars
1 Review

Out of Stock

Don't worry though, we have a lot more Powermeter Cranksets - Road in stock than that.

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Why We Like The Shimano GRX RX810 Precision 3 Left-Side Power Meter

Riding with a power meter is arguably the best way to gauge our training progress, considering that power measurements are more accurately measured than things like heart rate, speed, and perceived effort. This left-side power meter from 4iiii is an easy way to outfit our bikes with an accurate, reliable power meter. It sets itself apart from other single-sided power meters thanks to 4iiii's patented 3 power measurement, which measures the strain on the crank arm from all three dimensions, ensuring every twist and flex gets represented as accurate wattage.


  • Single-sided power meter for Shimano GRX gravel cranksets
  • Gives reliable power measurements with +/- 1% accuracy
  • 3D power technology measures 3-dimensional strain
  • Connects wirelessly with Bluetooth and ANT+ devices
  • Compatible with Shimano GRX RX810 11-speed crankset
  • Item #FII000C
Hollowtech II aluminum
Powermeter Type
single-sided crank arm
Shimano GRX RX810 cranksets
3 dimensional power measurement, dual-channel ANT+ and Bluetooth connections
Accuracy (+/-)
Operating Time
100+ hours
Claimed Weight
Manufacturer Warranty
3 years