The Ultegra R8100 power meter crank is considered an indispensable tool and offers reliable, double-sided performance data acquisition and is waterproof. With a rechargeable battery and connectivity via Bluetooth®LE and ANT+, the Ultegra R8100 is a user-friendly training partner.
The Ultegra R8100 power meter crank offers everything a racing cyclist could wish for in terms of data. Due to its integrated and waterproof construction, it reliably delivers precise data in all weather conditions, including the respective performance on the left/right side. It features an easy-to-use, rechargeable lithium-ion battery and Bluetooth®LE and ANT+ connectivity options for easy setup.

Highlights:
- Integrated, waterproof and rechargeable lithium-ion battery
- Up to 300+ hours driving time * Depends on ANT+/Bluetooth®LE settings
- < 2% power meter accuracy over the entire calibration range * Depends on ANT+/Bluetooth®LE settings
- Self-developed strain gauges
- Fast start system thanks to zero point calibration via switch on the transmitter
- Software automatically compensates for temperature changes
- With SHIMANO CONNECT Lab, training and performance data can be analyzed and displayed
- Q factor: 148
- Chainline: 44.5mm
- Bolt circle diameter: 110mm
- Compatible chain: CN-M8100
- Recommended bottom bracket press fit: SM-BB72-41B
- Recommended bottom bracket thread: SM-BBR60
- Weight according to the manufacturer: 758g

(Translated with Google Translate)