Shimano Ultegra FC-R8100-P 12-Speed Power Meter Crankset - Double (165

Scientific 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 Bluetooth®LE connectivity makes using and recording your workouts easier than ever. Features:- Integrated, waterproof, and rechargeable Li-ion battery- Up to 300+ hours of ride time * Depending on ANT+/Bluetooth®LE settings- Accurate data collection- ±2.0% strain gage accuracy throughout the entire calibration range- Proprietary strain gauge- Possible to start quickly- Simple zero offset calibration with switch on transmitter- Active temperature compensation- Software automatically compensates for temperature changes- The provision of new force vector data makes it the optimal training tool to analyze and improve pedal stroke efficiency- With SHIMANO CONNECT Lab, you can analyze and vi