The INPEAK Powercrank-E power metre Shimano 105 FC-R7100 makes it easy to add power measurement to a bike fitted with a Shimano 105 12-speed crankset.

Fitted directly to the left crankarm of the Shimano 105 FC-R7100, this power meter is compatible with both mechanical and Di2 105 drivetrains.

It measures power in watts, cadence and various other data points that enable you to analyse the quality of your pedalling. With a claimed accuracy of ±2 per cent, the Powercrank-E is a useful tool for structuring training sessions and tracking progress. Its ANT+ and Bluetooth Low Energy connectivity allows data to be transmitted to a GPS cycle computer, a smartphone or a compatible app.

The rechargeable LiPo battery offers up to 90 hours of battery life, allowing for numerous rides before each recharge. Thanks to its IP67 waterproof rating, the INPEAK sensor is designed to withstand the weather conditions encountered whilst cycling. Its measurement range extends from 0 to 2000 W and from 20 to 200 RPM for cadence. The system also measures torque efficiency and pedalling smoothness to provide further insight into pedalling technique.

Available in crank lengths of 160, 165, 170, 172.5 and 175 mm, it allows you to choose the configuration best suited to your riding position.

The Powercrank-E weighs just 10 g more than the original crank, so it has a minimal impact on the bike’s weight. The INPEAK Powercrank-E Shimano 105 FC-R7100 is therefore an affordable and high-performance solution for incorporating power measurement into your cycling training.

Technical specifications

General information:
- Brand: INPEAK
- Model: POWERCRANK-E SINGLE
- Type: Power metre on left crank arm
- Compatibility: Shimano 105 FC-R7100
- Compatible drivetrains: Shimano 105 mechanical or Di2 12-speed
- Measurement: Left-hand side
- Available crank 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
- Battery life: Up to 90 hours
- Charging: 2 m magnetic USB cable
- Water resistance: IP67
- Operating temperature: -5 °C to +50 °C
- Weight: Original crank arm + 10 g

Contents of the box
- INPEAK POWERCRANK-E SINGLE power sensor mounted on the left crank arm
- 2 m magnetic USB charging cable
- Device card with PIN code for the mobile app
- User manual
- Stickers