This crankset is the heart of our X-Range gearing philosophy. With tight 13-tooth gaps between chainrings and paired with a wide range of cassettes, riders get more range while shifting less often and staying on the big chainring longer. Previously only available on SRAM RED, our integrated chainrings are light, stiff, and incredibly durable. The black finish paired with dazzling glossy lightweight carbon fiber crank arms is an asset to any bike. The unique shape provides a lighter, stiffer, and more durable chainring. X-Range gearing technology provides more range and a smoother progression, ensuring the rider can always shift sharply and precisely. This crankset can be upgraded with a power meter. This crankset has 48/35T and 170mm crank arms. X-Range technology provides more range and a smoother gear ratio. Carbon crank arms. Uniquely shaped chainring that is lighter, stiffer and more durable.