Sram: We wanted light weight, stiffness, and durability, and we got all three. Our one-piece construction ensures that none of your effort goes to waste. A 13-tooth delta on all chainring pairs ensures precise shifting for any setup, as well as a less dramatic change in cadence during front shifts. And the technology we’ve packed in makes this our longest-lasting chainring set ever.FEATURESCrisp and accurate front shiftsOne-piece construction for faster, smoother, more secure shiftingX-Range gearing technology gives you more range and a smoother gear progression, so you're always in the right gear SPECIFICATIONSChainring Size: 46/33T, 48/35T, 50/37TBolt Circle Diameter (BCD): Direct Mount (DM)Speeds: 12Compat - Yaw: n/aMaterial (Chainring): AluminumColor (Chainring): Black