SHIMANO M191 170mm 38/38 /48 Silver/Silver without Chainguard BB Shell Width: Square TaperChain Compatibility: 3/32",9-SpeedChainring BCD: RivetedmmChainrings: 28/38/48TCrank Color: SilverCrank/FD Type: Mountain TripleCrankarm Length: 170mmCrankarm Length: 170mmCrankset BCD: RivetedCrnk Clr: silverPedal Spindle: 9/16"Rings: 28-38-48Spin: Not ApplicableSpindle Interface Type: Square Taper JISSpindle Length: 113mm