The Shimano FC-MT210 2-piece crankset is designed for 2x9 MTB drivetrains. It features HYPERDRIVE technology and SG-X chainrings for precise, reliable shifting. FEATURES: HYPERDRIVE technology provides smooth and precise shifting performance for trail focused riders Compatible with outboard 24mm bottom brackets (Bottom bracket sold separately) Anodized crank arms for extra durability Compatible with HG 9-speed chains For 48.8mm Chainline 176mm Q-factor SPECS: Number of Chainrings: Double Color: Black Chainline/Hub Compatibility: 135/142 MTB Hubs Pedal Spindle: 9/16" Crank Intended Use: Mountain Crank Length (mm): 170 Rings: 36/22 Spindle Interface Type: Shimano Hollowtech II Drivetrain Speeds: 9 Chainring BCD: Riveted BB Included: No