SHIMANO Ultegra FC-R8100P Crank With Power Meter 172.5 mm

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 visualize your training and power data Specifications: - Rear Speeds: 12-speed - Front Speeds: 2 - Crank arm length(mm): 172.5 - Chain Guard: Without CG - Gear Combination: Without chainring