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INPEAK

INPEAK POWERCRANK-E Shimano GRX RX810/820 Left Crank Arm with Power Meter

The INPEAK POWERCRANK-E Shimano GRX RX810/820 Left Crank Arm with Power Meter integrates a single-sided power meter into an original Shimano GRX FC-RX810/RX820 left... Read more
369,90 €
369,90 €
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Description

The INPEAK POWERCRANK-E Shimano GRX RX810/820 Left Crank Arm with Power Meter integrates a single-sided power meter into an original Shimano GRX FC-RX810/RX820 left crank arm. It is specially designed for gravel and cyclocross riding, where the housing must withstand mud, dust and vibrations.

The power meter combines a gyroscope and accelerometer (IMU) with strain gauges for measurement accuracy of ± 2% over a range of 20 to 2000 W, along with cadence, torque effectiveness and pedal smoothness. Active temperature compensation (ATC) ensures reliable data from -5°C to +50°C, while the discreet, IP67 waterproof housing is specially designed for road and gravel riding.

The POWERCRANK-E has a rechargeable Li-Po battery that charges via the supplied magnetic USB cable and offers up to 90 hours of use. ANT+ and Bluetooth Low Energy connectivity ensure compatibility with most bike computers, watches and apps such as Zwift, while the INPEAK Manager app lets you update the firmware and adjust the scale factor.

Designed and manufactured in Poland, each power meter is individually calibrated before dispatch for proven reliability on all types of terrain, confirmed by hundreds of amateur and professional cyclists.

Ref: 16133059969404

Key features

Designed and manufactured in Poland, individually calibrated before dispatch

Rechargeable Li-Po battery, charged via the supplied magnetic USB cable

Active temperature compensation (ATC) from -5°C to +50°C

Discreet, IP67 waterproof housing designed for gravel and road riding

Ultra-lightweight power meter, just 10 g heavier than the original crank arm

ANT+ and Bluetooth Low Energy connectivity, compatible with Zwift

Firmware updates and scale factor adjustment via the INPEAK Manager app

Technical information

┘POWER METER
• Type: single-sided power meter (left side)
• Measurement accuracy: ± 2%
• Power measurement range: 20 to 2000 W
• Cadence range: 20 to 200 rpm
• Weight: original Shimano GRX crank arm weight + 10 g
• Housing waterproof rating: IP67
• Manual zero-offset calibration: yes
• Active temperature compensation (ATC): yes, -5°C to +50°C
• Gyroscope + accelerometer (IMU): yes
• Torque effectiveness and pedal smoothness: yes
• Cycling dynamics and left/right balance: available only on the TWiN2 version
• Operating temperature: -5°C to +50°C
• Storage temperature: -20°C to +50°C┌

┘BATTERY
• Type: rechargeable Li-Po
• Capacity: 110 mAh
• Battery life in use: up to 90 hours
• Standby battery life: up to 6 months
• Battery life in transport mode (ShipMode): up to 24 months
• Full charging time (0-100%): 2 hours
• Charging temperature: +5°C to +40°C
• Lifespan: less than 20% capacity loss after 300 full cycles (approximately 6 years of use)
• Required charger: 5VDC, 1000mA (not supplied)
• Low-battery notification: yes┌

┘SOFTWARE & CONNECTIVITY
• Dedicated app: INPEAK Manager (iOS/Android)
• Remote firmware updates: yes
• Scale factor adjustment: yes
• Zwift-compatible mode: yes
• ANT+ compatibility: yes
• Bluetooth Low Energy compatibility: yes
• Automatic sleep and wake: yes┌

┘COMPATIBILITY
• Shimano GRX FC-RX810 / FC-RX820 crank arm (single or double chainring)
• Available crank arm lengths: 170 / 172.5 / 175 mm
• Fits a Hollowtech II bottom bracket
• Compatible with GRX single (40T) or double (48-31T / 46-30T) chainrings
• Replaces only the left crank arm: the original right crank arm and chainrings are retained┌

┘PACKAGE CONTENTS
• Shimano GRX FC-RX810/RX820 left crank arm with integrated power meter
• Magnetic USB charging cable
• Quick instruction manual
• Sticker set
• Device data card┌
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Price information

*Recommended retail price from supplier in July 2026