The INPEAK Powercrank-E power metre Shimano Ultegra FC-R8100 allows you to add accurate power measurement to a bike fitted with a Shimano Ultegra 12-speed crankset.

Fitted directly onto the original left crank arm of the Shimano Ultegra FC-R8100 crankset, it preserves the groupset’s integrated design and aesthetics. This power meter is ideal for road cyclists wishing to structure their training and track their performance accurately. With a claimed accuracy of ±2 per cent, it provides reliable data for analysing every ride and measuring progress.

The Powercrank-E measures power, cadence, torque efficiency and pedalling smoothness. Its dual ANT+ PWR and Bluetooth Low Energy connectivity allows data to be transmitted to a GPS cycle computer, a smartphone or a compatible app. Its rechargeable LiPo battery offers up to 90 hours of battery life, allowing for multiple sessions without frequent recharging. With an IP67 waterproof rating, the sensor is designed to withstand the weather conditions encountered on cycling outlo.Son ’s discreet integration minimises the impact on weight, adding just 10 g compared to the original crank. The sensor operates across a power range of up to 2,000 W and measures cadences from 20 to 200 RPM.

Available in crank lengths of 160, 165, 170, 172.5 and 175 mm, it adapts to various positioning configurations. The INPEAK Powercrank-E Shimano Ultegra FC-R8100 is therefore a high-performance solution for structured training, cycle tours and competition.

Technical specifications

General information
- Brand: INPEAK
- Model: POWERCRANK-E SINGLE
- Type: Power meter on left crank
- Compatibility: Shimano Ultegra FC-R8100
- Drivetrain: Shimano Ultegra 12-speed
- Installation: On original left-hand crankarm
- Available lengths: 160 / 165 / 170 / 172.5 / 175 mm

Measured data
- Power: 0 to 2000 W
- Cadence: 20 to 200 RPM
- Accuracy: ±2 %
- Torque efficiency: Yes
- Smooth pedalling: Yes

Connectivity and power supply
- Communication: ANT+ PWR / Bluetooth Low Energy
- Battery: Built-in rechargeable LiPo
- Battery life: Up to 90 hours
- Charging: 2 m magnetic USB cable
- Water resistance: IP67
- Operating temperature: -5 °C to +50 °C
- Additional weight: Approx. 10 g compared to a Shimano Ultegra R8100 crank arm

Contents of the box
- INPEAK POWERCRANK-E SINGLE power metre installed on the left crank arm
- 2 m magnetic USB charging cable
- Card with device details and PIN code
- User manual
- Set of stickers