The FC-MT210 2-piece crankset is designed for 2x9 MTB drivetrains. It features HYPERDRIVE technology and SG-X chainrings for precise, reliable shifting. For 48.8mm Chainline. 176mm Q-factor. HYPERDRIVE technology provides smooth and precise shifting performance for trail focused riders. Compatible with outboard 24mm bottom brackets (Bottom bracket sold separately). Anodized aluminum crank arms for extra durability. Compatible with HG 9-speed chains. Item Specifications: Color: Black, Rings: 46/30, Number of Chainrings: Double, Crank Length (mm): 170, Crank Intended Use: Mountain, Drivetrain Speeds: 9, BB Included: No, Pedal Spindle: 9/16", Spindle Interface Type: Hollowtech II, Chainring BCD: Riveted, Chainline/Hub Compatibility: 135/142 MTB Hubs, Defined Color: Black,