Shimano Ultegra FC-R8100 12V Crankset with Shimano Potentiometer - 172.5

Shimano Ultegra FC-R8100 12V potentiometer cranks require accurate measurement and ease of use, and the new ULTEGRA R8100 power meter has both. Its double-sided measurement is accurate to 2.0% and zero offset calibration is a quick and easy process. And perhaps most importantly, its long battery life, easy recharging and ANT+ and Bluetooth connectivity make it easier than ever to use and record your workouts. Features:Use: RoadBuilt-in, waterproof, rechargeable lithium-ion batteryUp to 300+ hours of driving time Depending on ANT+/BluetoothLE settingsAccurate data collection< 2.0% voltage indicator accuracy over the entire calibration rangeUnique voltage indicatorQuick start-up is possibleSimple zero offset calibration with a switch on the transmitterActive temperature compensationThe software automatically compensates for temperature changes.