Take your training and racing to new heights with SRAM's XX1 Quarq Power Meter Crankset. It takes SRAM's brilliantly stiff, hollow carbon XX1 cranks, and marries them to an integrated, ultra-precise Quarq Power Meter for feathery low weight and accurate power measurement. Feel every watt course through the crank and propel you forward, while every iota of your strength is recorded with an accuracy of +/- 1.5%. Having precise objective feedback lets you see your improvements. And, to make setup as easy as possible it features an easily accessible, weather-tight battery compartment.