- Speeds 12- Crank arm length 165mm and 170mm- BB Compatibility All SRAM Road DUB BBs, except Ai- Chainring Size 46/33T- Bolt Circle Diameter (BCD) 107 BCD- Chainline 45.0mm- BB Spindle Interface DUB- Chainring material Aluminum- Guard No Guard- Crank arm material Aluminum- Color (Crank arm) Black- Power Meter Type Spindle- Hub Spacing Compatibility Standard 142mm