Inpeak Powercrank-e power metre left crank arm, Shimano GRX FC-RX810/820

The INPEAK Powercrank-E power metre ( Shimano GRX FC-RX810/820) makes it easy to add power measurement to a bike fitted with a GRX ‘ Shimano ’ crankset.

Integrated into the left crank arm, this sensor is specially designed for gravel, cyclocross and all-terrain road cycling. With a claimed accuracy of ±2 per cent, it provides reliable data to help structure training sessions and track performance. The Powercrank-E measures power, cadence, torque efficiency and pedalling smoothness. Its 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 to support long rides and regular training sessions. The IP67 waterproof rating ensures good protection against water and dust, a key advantage for gravel and cyclocross rides. The sensor adds just 10 grams to the weight of the original crankset, ensuring it remains discreetly integrated. Its measurement range covers 0 to 2,000 watts and 20 to 200 RPM for cadence.

Available in 170, 172.5 and 175 mm, it allows you to choose the crank length best suited to your setup. Charging is carried out using the supplied 2-metre magnetic USB cable, requiring a 5 V / 1,000 mA power supply.

The INPEAK Powercrank-E Shimano GRX is therefore a comprehensive solution for utilising power data on the demanding terrains of gravel and cyclocross.

Technical specifications

General information:
- Brand: INPEAK
- Model: POWERCRANK-E SINGLE
- Type: Left-crank power metre
- Compatibility: Shimano GRX FC-RX810 / FC-RX820
- Use: Gravel, cyclo-cross, all-terrain road
- Fitting: Left crank arm
- Additional weight: +10 g compared to the original crank arm
- Available lengths: 170 / 172.5 / 175 mm

Measured data
- Power: 0 to 2000 W
- Cadence: 20 to 200 RPM
- Accuracy: ±2%
- Torque effectiveness:
- Pedal smoothness

Connectivity and power supply
- Communication: ANT+ PWR / Bluetooth Low Energy
- Battery: Built-in rechargeable LiPo battery
- Battery life: Up to 90 hours
- Charging: USB cable with magnetic connector, 2 m
- Charger required: 5 V DC / 1000 mA, not supplied
- Water resistance: IP67
- Operating temperature: -5 °C to +50 °C

Contents of the box
- INPEAK POWERCRANK-E SINGLE power sensor fitted to the left crank arm
- 2 m USB charging cable with magnetic connector
- Card with device details and PIN code for the mobile app
- User manual
- Set of stickers