Built from of the same quality Ultegra crankset we love the power-equipped Shimano Ultegra FC-R8100-P Power Meter Crankset gives us the data we need to get faster. This crankset utilizes a highly accurate and weather-proof power meter to detect power output from both legs as well as our cadence. We use the power-meter crankset to best judge our efforts and get the most out of every training session.