The FC-R9100-P delivers world-class power measurement seamlessly designed into the DURA-ACE HOLLOWTECH II crank.

The dual-sided strain gauges are internally hard wired together for reliable performance in all weather conditions and accurate measurement regardless of pedaling position.

Shimanos integrated approach also ensures simplified maintenance with a single rechargeable battery powering the entire unit and the ability to wirelessly update firmware.

CHAINRINGS ARE NOT INCLUDED WITH THIS MODEL

• Integrated design delivers system reliability and waterproof performance in all conditions
• Dual-side strain gauges are hard wired together for accurate data collection and direct response
• 2% strain gauge power measurement accuracy
• Stable power measurement system across all pedaling positions
• Reliable electrical system that is waterproof in all conditions
• Single rechargeable battery for easy maintenance
• Easily swap chainrings without affecting power measurement
• Bluetooth and ANT+ wireless communication