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4iiii PRECISION 3.0 XT M8100 Left Arm Power Meter



PRECISION 3.0 XT M8100 Left Arm Power Meter

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Product ID: 1590746

4iiii PRECISION 3.0 XT M8100 Left Arm Power Meter

The 4iiii PRECISION 3.0 is a lightweight, low profile crank-based power meter pre-installed onto an XT M8100 left arm crank. This latest PRECISION 3.0 model has a huge 800-hour battery life, is compatible with most bike frames and includes an indicator light to show you the unit is powered up, to warn of low battery and notify of a successful zero-offset. 

It incorporates patented 3D Strain Gauge technology, ensuring power reflects any pedal stroke changes, and leg imbalances can be accounted for with the scale factor on the 4iiii app. Measuring up to 4,000 watts and cadences of between 30 and 170RPM, this unit is perfect for every rider. Active Temperature Compensation prevents inconsistencies in readings when the conditions change, and IPX7 waterproofing means the internals are well protected from the elements. 

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 XT M8100 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 XT M8100 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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