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4iiii PRECISION 3.0 XTR M9100 Left Arm Power Meter

MSP £475.00 Save 31%


PRECISION 3.0 XTR M9100 Left Arm Power Meter

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Product ID: 1590750

4iiii PRECISION 3.0 XTR M9100 Left Arm Power Meter

Train more efficiently by adding the 4iiii PRECISION 3.0 Left Arm Power Meter to your Shimano XTR M9100 setup. The unit is pre-installed into the crank and has a low profile for good compatibility with most frames. This latest model has an impressive 800-hour battery life, meaning the battery will rarely need replacing, and an indicator light will tell you when it does. 

Accurate to +/- 1%, you can be sure your readings closely match your true outputs, and Active Temperature Compensation and IPX7 waterproofing ensure that numbers are consistent across varying conditions. Patented 3D Strain Gauge technology means changes in pedal stroke are reflected, while using the scale factor in the 4iiii app cancels out the issues of using a single-sided system, taking leg imbalances into account. 

Please note: Because 4iiii PRECISION 3 power meters are mounted on the inside of your crank, there needs to be enough space between your crank and the frame for the pod to fit. See 4iiii clearance guidelines below to check your frame

Check Bike Frame Compatibility for the 4iiii PRECISION Power Meter


  • Ride ready PRECISION 3.0 pre-installed on a brand new left Shimano XTR M9100 crank arm
  • With an ultra low profile design, the PRECISION 3 is compatible with more bike frames than ever before
  • +/-1% accuracy
  • At only 9 grams, the PRECISION 3.0 is the lightest power meter on the market
  • Up to 800 hours of battery life
  • Patented 3D Strain Gauge technology measures power by using the lateral bend, pull, and twist of your crank. This means that throughout your ride, power numbers will reflect the changes to your pedal stroke no matter how you are riding
  • The indicator light means you can see when your power meter has turned on, performed a successful zero-offset, or has a low battery 
  • Active Temperature Compensation continually adjusts to the conditions to ensure that no matter what nature throws your way, your power numbers will be consistent
  • Take your leg imbalance into account with a left only power meter by adjusting the scale factor using the 4iiii app
  • ANT+ and BLE compatible so you can use it on your preferred head unit and favourite indoor training app, such as Zwift, TrainerRoad, Rouvy or The Sufferfest
  • Pair your smart trainer to ERG while using your power meter as the power output device
  • An IPX7 waterproof rating ensures your power meter can handle the toughest conditions
  • Industry-leading 3-year warranty


  • Ride-ready PRECISION 3.0 power meter preinstalled on a brand-new Shimano XTR M9100 left crank arm
  • Crank arm fits bottom brackets using the Hollowtech II interface
  • Accuracy: +/- 1%
  • Battery type: CR2032 coin cell
  • Battery life: Up to 800 hours
  • Waterproof rating: IPX7
  • Cadence range: 30 - 170 RPM
  • Power range: 0 - 4,000 watts
  • Height: 5.5mm
  • Operating temperature: 0 - 50°C
  • Communication protocols: ANT+, Bluetooth
  • Manufacturer claimed weight: 9 grams (PRECISION 3.0 unit only)

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