Shimano Altus 7-8 Speed Square Taper Crankset Size: 170mm Type: Ring(s) Included Style: Mountain Color: Black Spindle Interface Type: Square Taper JIS Pedal Spindle: 9/16" Chainring BCD: Riveted Rings: 42/32/22 BB Included: No Crank Intended Use: Mountain Defined Color: Black Crank Length (mm): 170 Drivetrain Speeds: 7 Drivetrain Speeds: 8 Number of Chainrings: Triple Chainline/Hub Compatibility: 135/142 MTB Hubs