Sram red d1 gxp crankset 50 37t 12s not include black

the sram red crankset leverages a pivotal design innovation smaller chainrings and a wider cassette range this leads to smoother and faster shifting up front and more useful gearing for today s riders the new configurations improve cadence and efficiency while also delivering shifts that are crisp clean and quick every time features x range gearing technology gives you more range and a smoother gear progression so you re always in the right gear improved front shifting performance for crisp and accurate front shifts unique chainring design results in a lighter weight stiffer more durable crankset power upgradeable chainline 45 mm