4iiii PRECISION 3.0 Dura-Ace R9100 Left Arm Power Meter

£363.59 - £458.99
RRP £489.00


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PRECISION 3.0 Dura-Ace R9100 Left Arm Power Meter

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Product ID: 1590740

4iiii PRECISION 3.0 Dura-Ace R9100 Left Arm Power Meter

The perfect complement to a Dura-Ace R9100 setup, this 4iiii PRECISION 3.0 Left Arm Power Meter provides incredibly accurate readings, is only 9 grams and has a long 800-hour battery life. The unit comes pre-installed on a genuine Shimano crank and has a low profile design ensuring it works with the majority of bike frames. 

Patented 3D Strain Gauge technology ensures all power readings take into account changes in pedal stroke, and, when used with the 4iiii app, it's also possible to use the scale factor to account for any imbalances between the left and right leg. ANT+ and Bluetooth connectivity allow you to use the PRECISION 3.0 with any compatible head unit or app, for training indoors and out. 

Even when the conditions are changeable, outputs remain consistent thanks to Active Temperature Compensation and IPX7 waterproofing. There's a light incorporated into the unit, indicating low battery, power and a successfully performed zero-offset, so you'll know when the system is ready to go and when it's time to swap out the battery. 

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 Dura-Ace R9100 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 Dura-Ace R9100 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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