Shimano FC-R8100 Ultegra172.5mm 52/36 W/Power Meter Crankset tyre The tall knobs punch through

The tall knobs punch through dust and loam to find traction

Micro-mesh ventilation

All-steel construction on base and barrel

Special 3D teeth machining for ultimate mud relief decrease wear and noise dramatically

and saddle bags

Shimano FC-R8100 Ultegra172.5mm 52/36 W/Power Meter Crankset tyre The tall knobs punch throughScientific training requires accurate measurement and user friendliness, and the new ULTEGRA R8100 power meter has both. Its dual sided measurement is accurate within 2. 0% and zero offset calibration is a quick and easy process. Perhaps most importantly, its long battery life, easy recharge, and ANT+ and BluetoothLE connectivity makes using and recording your workouts easier than ever. Integrated, waterproof, and rechargeable Li ion battery Up to