1-speed, DUB, without bottom bracket, 12-/13-speed compatible, hollow carbon crank arms, X-Sync aluminum direct mount chainring, chainline 47.5 mm (Wide axle) Number of chainrings 1 Type Item main color black Chainring large 42 T. Chainline 47.5 mm Crank length 165.00 mm Secondary color gray System compatibility 12-speed, 13-speed Bottom bracket DUB Variation Crankset The SRAM RED Wide crankset maximizes tire clearance and features a hollow carbon construction for high strength and low weight in combination with a direct mount 1x chainring. Single drivetrain simplifies functionality and reduces weight. Non-aero direct mount chainrings from 38T to 46T are easy to change. SRAM X-SYNC chainring technology with wide and narrow teeth offers maximum chain control. Ultralight hollow carbon crank arms. DUB bottom bracket adds durability and simplicity. Can be upgraded to a power meter. Sram Article number: 735687 EAN code: 710845898938 Supplier number: 00.6118.685.013 Retail packaging: Yes