2-speed, DUB, without bottom bracket, 12-speed compatible, hollow carbon crank arms, direct mount aluminum chainring, chainline 45mm Number of chainrings 2 Article main color black Large chainring 48 T. Small chainring 35 T. Chainline 45.0 mm Crank length 175.00 mm Secondary color grey System compatibility 12-speed Bottom bracket DUB Variation Groupset SRAM continues to innovate; SRAM's lightest and stiffest crank is now even lighter thanks to optimized hollow carbon cranks. The optional power meter is the ultimate tool to elevate performance. Professionals can no longer do without it. It is the lightest, stiffest, and most accurate (max +/-1.5% deviation) power meter ever.Crankset made from one pieceX-Range technology for more range and smoother shifting29 grams lighter than the previous versionDUB bottom bracketOptional power meterSRAM Item number: 735213 EAN code: 710845898679 Supplier number: 00.6118.683.011 Retail packaging: Yes