The Omega crankset is where fashion meets function, combining sleek styling with robust industrial design elements. Fits and 10-11 speed systems. Painted bead blasted black finish with printed graphics. Die cast aluminum crank arms are lightweight and durable. Chromoly chainring bolts. Item Specifications: BB Included: No, Chainline/Hub Compatibility: 130 Hubs, Chainring BCD: 120, Chainring BCD: 90, Color: Black, Crank Intended Use: Road, Crank Length (mm): 172.5, Defined Color: Black, Drivetrain Speeds: 10, Drivetrain Speeds: 11, Number of Chainrings: Double, Pedal Spindle: 9/16", Rings: 46/30, Spindle Interface Type: 386 EVO,