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INPEAK

INPEAK POWERCRANK-E Shimano Ultegra R8100 Left Crank Arm Power Meter

The INPEAK POWERCRANK-E Shimano Ultegra R8100 Left Crank Arm Power Meter houses a single-sided power meter inside a genuine Shimano Ultegra FC-R8100 left crank... Read more

Recommended price* : 409,00 €

Regular price 369,90 €
Regular price Sale price 369,90 €
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Description

The INPEAK POWERCRANK-E Shimano Ultegra R8100 Left Crank Arm Power Meter houses a single-sided power meter inside a genuine Shimano Ultegra FC-R8100 left crank arm. It replaces your current crank arm without changing the rest of the chainset, so you can start structured training without a major investment.

A gyroscope and accelerometer (IMU) work with strain gauges to deliver measurement accuracy of ± 2% across a range of 20 to 2000 W, alongside cadence, torque effectiveness and pedal smoothness. Active temperature compensation (ATC) keeps the data reliable from -5°C to +50°C, while the IP67 housing stands up to rain, mud and splashes.

The POWERCRANK-E version features a rechargeable Li-Po battery, charged using the supplied magnetic USB cable, with up to 90 hours of use. ANT+ and Bluetooth Low Energy connect it to most cycling computers, watches and apps such as Zwift, while the INPEAK Manager app lets you update the firmware and fine-tune the scale factor.

Designed and manufactured in Poland, each sensor is individually calibrated before dispatch for consistent accuracy, confirmed by hundreds of amateur and professional cyclists. A reliable way to track your progress without changing your bike or chainset.

Ref: 16133060264316

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

IP67 waterproof, impact-resistant housing

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 Ultegra crank arm weight + 10 g
• Enclosure protection 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 in 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: 5 V DC, 1000 mA (not included)
• 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 Ultegra FC-R8100 crank arm, 2x12-speed
• Available crank arm lengths: 160 / 165 / 170 / 172.5 / 175 mm
• Fits Hollowtech II bottom brackets
• Compatible with original Shimano Ultegra chainrings (50-34T / 52-36T / 54-40T)
• Replaces the left crank arm only: the original right crank arm and chainrings are retained┌

┘PACKAGE CONTENTS
• Shimano Ultegra FC-R8100 left crank arm with integrated power meter
• Magnetic USB charging cable
• Quick instruction manual
• Sticker set
• Device data card┌

Price information

*Recommended retail price from supplier in July 2026