Sugino RD2 Single Speed Cranksets include a 48-tooth 3/32" aluminum chainring.Road (110mm BB) or track (103mm BB), includes 48-tooth 3/32" alloy silver chainring. Can be made into a double with double chainring bolt sets and appropriate chainring and bottom bracket. Chainline with a 103mm bottom bracket is 45mm. Item Specifications: Defined Color, Silver, Rings, 48, Spindle Interface Type, Square Taper JIS, Chainring BCD, 130, Color, Silver, Chainline/Hub Compatibility, 120 Hubs, Chainline/Hub Compatibility, 130 Hubs, Drivetrain Speeds, Single Speed 3/32", Weight, 565, Number of Chainrings, Single, Crank Intended Use, Road, Crank Intended Use, Track, BB Included, No, Pedal Spindle, 9/16", Crank Length (mm), 165,.