Riders want more range and closer steps between gears and that’s the driving design principle of the SRAM Force® D1 chainset. It offers smaller chainrings with a consistent 13-tooth gap between size variants, delivering smooth, accurate and dependable shifting for the modern rider. Always find the sweet spot. Sram Force D1 Dub Chainset Features X-Range™ gearing technology gives you more range and a smoother gear progression, so you’re always in the right gear Crisp and accurate front shifts DUB™ bottom bracket adds durability and simplicity Speeds: 12 BB Spindle Interface: DUB Crank arm material: Carbon Chainring material: Aluminum BB Compatibility: All SRAM Road DUB BBs Chainline: 45.0mm, 51.0mm Bolt Circle Diameter (BCD): 107 BC