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 DUB™ bottom bracket adds durability, simplicity and broad compatibility Can be upgraded to a power meter Specifications: Speeds: 12 BB Compatibility: All SRAM Road DUB BBs Chainring Size: 46/33, 48/35, 50/37 Crank arm length: 170mm, 172.5mm, 175mm Chainline: 45.0mm BB Spindle Interface: DUB Chainring material: Aluminum Guard: No Guard Bolt Circle Diameter (BCD): Direct Mount (DM) Crank arm material: Carbon Color (Crank arm): Natural carbon