50 teeth, 1-speed, DUB, without bottom bracket, black 12-speed compatible, carbon crank arms, X-Sync Aero aluminum direct mount chainring, 45mm chainline Number of chainrings 1 Type Main article color black Large chainring 50 T. Chainline 45.0 mm Crank length 172.50 mm System compatibility 12-speed Bottom bracket DUB Variation Crankset The lightweight and stiff SRAM Force Aero E1 crankset in combination with the aerodynamic 1x chainring (44T-50T) ensures maximum performance with every pedal stroke. Chasing segments and performing in time trials is now easier, faster, and with more confidence. Single drivetrain simplifies functionality and reduces weight Direct mount aerodynamic chainrings for improved aerodynamics X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control DUB bottom bracket ensures durability and simplicity Can be upgraded to a power meter Available in crank arm lengths of 165, 170, 172.5, and 175 mm Sram Article number: 737863 EAN code: 710845915949 Supplier number: 00.6118.740.004 Retail packaging: Yes