Crank Full Carbon Crank. See the dropdown menu for available options. Buy it if you are looking for a lightweight carbon crank that is compatible with 10/11/12-speed Shimano/SRAM/Campy drivetrains! Material: Carbon arms, aluminum chainring and rings, M30 spindle made of alloy (30mm/28mm). Gear Ratio: Simplified version of LevaTime II X-Ring - 48/32, 50/34, 52/36 with steel chainring bolts. Chain: 10/11/12-speed KMC, Shimano, SRAM - all standard models or "Flat-Top". 12-speed marking: See the image above showing the new marking "10/11/12sp" for these updated sets. Note: Older sets without this marking are not 12-speed. Average weight: 680g: 172.5 with 50/34. Chainline 2X = 44.5mm. Road. Teeth: not compatible with Shimano GRX front derailleurs. Q-Factor: 147mm. Drive system: Shimano - compatible with Di2 and mechanical Shimano 10/11/12-speed drivetrains. SRAM - compatible with mechanical SRAM 10/11/12-speed and e-Tap drivetrains. Campy - compatible with EPS and mechanical Campy 10/11/12-speed drivetrains. This crank requires our Praxis M30 BB. M30 = 30 mm bottom bracket / 28 mm non-bottom bracket. Offered in BSA, BB86, T47 I.B, T47 E.B, BB30, PF30, 386EVO, BBRight.