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4iiii PRECISION Shimano GRX RX810 Right Side Power Meter

Josh Matthew October 13, 2021
5.00 out of 5 based on 1 customer rating
(1 customer review)


4iiii power on a Shimano GRX RX810 right side crank arm!

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4iiii PRECISION Shimano GRX RX810 Right Side Power Meter

The 4iiii PRECISION Shimano GRX RX810 Right Side Power Meter is perfect for those that have a 4iiii Shimano GRX left side crank arm power meter and want to upgrade to a dual-sided crankset. With power sensors on both the left and right crank arms, you can measure and record power from both legs! Or, some bike frames cannot fit a left side power meter due to clearance issues with the chainstay. In these situations, this 4iiii right side power meter is a perfect solution. It allows you to quickly and easily add power to the right side of your crankset where clearance and compatibility issues don’t exist.

The 4iiii GRX RX810 Right Side Power Meter uses patent pending 3-D tri-axial strain gauge technology, which is accurate +/- 1.0%. It’s also super lightweight (added weight of about 10 grams) and comes with a full 3-year warranty. 4iiii power meters are compatible with both ANT+ and Bluetooth SMART devices. This means you can use it with your favorite bicycle computer, watch or smart phone.



This power meter comes in the following crank arm lengths: 170 mm | 172.5 mm | 175 mm

Please note, every size comes with 40T chainrings.



The 4iiii power meter is compatible with all Shimano GRX cranksets including GRX RX600.

Please note, this product requires a Shimano Crankarm Cap Tool (sold by us separately) for installation.


Tools Needed for Installation

  • Shimano Crank Arm Cap Tool (sold by us separately)
  • 5 mm Allen key


In the Box

  • 4iiii Power Meter
  • CR2032 battery
  • Quick Start guide


4iiii PRECISION Shimano GRX RX810 Right Side Specs

Name4iiii PRECISION GRX RX810 Right Side
Bike TypeGravel
Location of Power MeasurementCrank arm
Left or Both Legs MeasuredRight only
Independent Left/Right MeasurementNo
Communication ProtocolANT+ and Bluetooth SMART
Claimed Accuracy+/- 1.0%
Weight10 grams (added weight)
Battery TypeCR2032
Battery Life100 hours
Method of Cadence MeasurementAccelerometer
Warranty3 years


1 review for 4iiii PRECISION Shimano GRX RX810 Right Side Power Meter
  1. Kim Hyunseung (verified owner)

    Shipping was bit slow, but I would give it 5 stars for their friendly response.
    It works well with my exisitng grx left sided PM. Thanks to PMC

    • Power Meter City

      Thank you Kim! We are glad you finally received your power meter! Thank you for taking the time to leave us an awesome review! (Our very first one!) If there is anything else we can do, please let us know! Ride safe!

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