SHIMANO M191 170mm 24/34 /42 Black/Black without Chainguard BB Shell Width: Square TaperChain Compatibility: 3/32",9-SpeedChainring BCD: RivetedmmChainrings: 24/34/42TCrank Color: BlackCrank/FD Type: Mountain TripleCrankarm Length: 170mmCrankarm Length: 170mmCrankset BCD: RivetedCrnk Clr: BlackPedal Spindle: 9/16"Rings: 24-34-42Spin: Not ApplicableSpindle Interface Type: Square Taper JISSpindle Length: 113mm