The FC-MT210-3 Crankset features Hollowtech II technology to provide the best balance of stiffness, strength, weight, and rotating performance. Bottom bracket not included. Item Specifications: Pedal Spindle: 9/16", BB Included: No, Color: Black, Defined Color: Black, Number of Chainrings: Triple, Crank Length (mm): 175mm, Rings: 44/32/22, Drivetrain Speeds: 9, Spindle Interface Type: Hollowtech II,