Sugino 75 Track Armset 170mm Black BB Shell Width: Square TaperChainring BCD: 144mmChainrings: No ChainringsCrank Color: BlackCrankarm Length: 170mmCrankarm Length: 170mmCrankset BCD: 144mmCrnk Clr: BlackSpin: Not ApplicableSpindle Interface Type: Square Taper ISOSpindle Length: 109mmWeight: 580g