2-speed, DUB, without bottom bracket, 12-speed compatible, hollow carbon crank arms, direct mount aluminum chainring, 45 mm chainline Number of chainrings 2 Type Article Main color black Large chainring 46 T. Small chainring 33 T. Chainline 45.0 mm Crank length 172.50 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 an optimized hollow carbon crank. The optional power meter is the ultimate tool to take performance to the next level. 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 a single piece X-Range technology for more range and smoother shifting 29 grams lighter than the previous version DUB bottom bracket Optional powermeter SRAM Article number: 735217 EAN code: 710845898723 Supplier number: 00.6118.683.016 Retail packaging: Yes