Chosen by the best climbers, sprinters and triathletes in the world, the DURA-ACE R9100 crank is lighter but at the same time maximizes power transfer. Its new design and iconic appearance are suitable for race-specific disc brake systems while offering a wide range of gear ratios and crank lengths. The addition of a reliable, accurate and waterproof power meter makes this crank an even more valuable tool for demanding cyclists. Featuring a rechargeable lithium-ion battery, left/right side balance and Bluetooth LE/ANT+ connection, the SHIMANO DURA-ACE power meter sets a new standard in the field of cycling data collection.

- Design integrated
- Reliable electrical system
- Maximum waterproofness in all conditions
- Easy maintenance
- Integrated rechargeable battery
- Extended battery life for trouble-free operation
- Easy replacement of the chainrings without compromising power performance
- Adequate clearance from the frame
- Sufficient clearance with direct mount brake caliper
- Precise data collection
- ±2% (300W, 90 rpm) accuracy of power measured with strain gauge over the entire range
- Stable power measurement system at various attachment positions
- Active temperature compensation
- Proprietary strain gauge
- Automatic compensation via software
- Battery: Rechargeable, Lithium Ion
- More than 300 hours of running time
- Quick response and stress-free operation
- Quick start
- Simple reset with ignition transmitter
- Response direct
- Left and right side connected with cable
- Magnet based cadence
- Bluetooth®LE and ANT+
- Wireless firmware update system