2-speed, DUB, without bottom bracket, black 12-speed compatible, aluminum crank arms, aluminum direct mount chainring set, chainline 45 mm Number of chainrings 2 Type Article Main color black Large chainring 48 T. Small chainring 35 T. Chainline 45.0 mm Crank length 172.50 mm System compatibility 12-speed Bottom bracket DUB Variation Crankset The SRAM Rival E1 Crankset is not only the most advanced, but also the most beautiful. Careful design has led to crank arms that optimize the stiffness-to-weight ratio, with material only where it is needed. Integrated chainrings ensure flawless shifting in ranges that meet every need, and the whole is more than 50 grams lighter than the previous generation. X-Range gearing technology offers more range and ensures smoother shifting, so the right gear is always available. Crisp and precise shifting. DUB bottom bracket ensures durability and simplicity. Available chainring combinations: 48/35T and 46/33T. SRAM Article number: 737871 EAN code: 710845916144 Supplier number: 00.6118.744.010 Retail packaging: Yes