- Speeds 11/12 - BB Compatibility DUB:BSA73, PF89.5, PF92, PF30 MTB73, BB30 MTB73, BSA MTB68SP - Chainring Size 32 - Crank arm length 170mm - Chainline 52.0mm - BB Spindle Interface DUB - Chainring material Aluminum - Guard No Guard - Bolt Circle Diameter (BCD) Direct Mount (DM) - Crank..