Tourney FC-TY501 cranksets deliver reliable, precise DUAL SIS shifting for MTB. 48.8 Chainline. Includes crank fixing bolt. Precision indexed shifting. Wide compatibility with multiple components in 6,7, and 8-speeds. Q-factor: 185.5mm. Item Specifications: BB Included: No, Chainline/Hub Compatibility: 135/142 MTB Hubs, Chainring BCD: Riveted, Color: Black, Crank Intended Use: Mountain, Crank Length (mm): 175, Defined Color: Black, Drivetrain Speeds: 7,8, Number of Chainrings: Double, Pedal Spindle: 9/16", Rings: 46/30, Spindle Interface Type: Square Taper JIS,