SRAM crank sets ´´Force E1´´ 2x, DUB, without Bottom Bracket 12-speed compatible carbon crankarms, aluminum chainrings Set for direct mounting, chainline 45 mm 37 / 50 teeth, 172.5 mm crank length.Specifications: - Crank length: 172,5 mm- Amount of chain rings: 2 - System compatibility: 12-speed - Bottom bracket: DUB - Large chain ring: 50 teeth- Small chain ring: 37 teeth- Chainline: 45 mm- Material: Aluminium, carbon