The Ultegra FC-R8100-P power meter crank offers the full range of features and the same precision as its Dura-Ace counterpart, but at a more attractive price. Training under scientific conditions requires precise measurements, as well as user-friendliness. The new Ultegra R8100 power meter crank excels in both areas. The dual-sided measurement is accurate to within 1.5%, and the zero-point calibration can be performed quickly and easily. Perhaps most importantly, it boasts a long battery life, easy recharging, and ANT+ and Bluetooth LE connectivity, making it easier than ever to record and utilize training data.