Your gear ships fast with Standard, Two-Day, or Local Pickup.
4iiii Precision Power Meter Shimano Dura Ace R9100 Left Crank Arm 172.5mm
Every product we sell is covered by a hassle-free 30-day satisfaction guarantee.
Why We Love It
About This Item
- Product is factory refurbished, and may have minor cosmetic imperfections
- 3 Year Warranty - 4iiii Powermeters are waterproof, durable, and designed to be accurate and precise even in the harshest conditions. Because of this, we are happy to offer an industry-leading 3-year warranty
- 3D Power Measurement - 4iiii's patented 3D power measurement system measures multidimensional strain, so you can be confident that your unique pedal stroke is still measured accurately no matter your riding conditions
- Industry Leading Accuracy - Our +/- 1% accuracy isn’t just a claim, it’s been third party tested and validated by leading scientists and the Locomotion Lab at the University of Colorado
- Dual-Channel ANT+ & Bluetooth Smart - 4iiii Powermeters communicate their measurements over both the widely-used ANT+ and Bluetooth Smart radio standards
|Group||Dura Ace R9100|
|Type||Powermeter Crank Arm|
|Crank Arm Length||172.5mm|
|Bottom Bracket Type||Hollowtech II|
Need Advice? Ask a Ride Guide
Our Ride Guide team is based in the U.S. and staffed with former bike mechanics, bike shop managers, and other certified bike nerds. Get expert advice on calibrating fit, deciding between models, or chat through any other questions.