Sugino XD Tandem LH Front or Rear 170mm Arm BB Shell Width: Square TaperChainring BCD: 110mmChainrings: No ChainringsCrank Color: SilverCrankarm Length: 170mmCrankarm Length: 170mmCrankset BCD: 110mmCrnk Clr: silverSpin: Not ApplicableSpindle Interface Type: Square Taper JISSpindle Length: 116mmWeight: 280g