Shimano Tourney FC-TY501 cranksets deliver reliable, precise DUAL SIS shifting for MTB. FEATURES: Precision indexed shifting Wide compatibility with multiple components in 6,7, and 8-speeds Q-factor: 185.5mm 48.8 Chainline Includes crank fixing bolt SPECS: Number of Chainrings: Double Color: Black Pedal Spindle: 9/16" Crank Intended Use: Mountain Crank Length (mm): 170 Chainline/Hub Compatibility: 135/142 MTB Hubs Rings: 46/30 Spindle Interface Type: Square Taper JIS Drivetrain Speeds: 7 , 8 Chainring BCD: Riveted BB Included: No