Barbecue Accessories -BCD 130 Crank Set 54T Chainring and Chainring Highlights BCD 130 Crank Set 54T Chainring and Chainring Description: The high-end bicycle crank set includes, crank arms, bottom bracket and the narrow wide chainring 54 teeth High quality aluminum alloy material, high strength, strong but ultralight Bottom bracket width: 68-73 mm. BCD: 104mm. Crank arm length: 170mm. Hollow crankset sprocket shaft for mountain bikes, road bikes. Compatible with five claw width of 68-73mm chain sprocket and single, double disc crankset, 9S 10S 11S specification: Black color BCD: 130mm Thickness: 4mm Tooth length: 7.2mm Package includes: 1 set of cranks (left and right) 1 piece bottom bracket 5 pairs of chain wheel bolts 1 piece chain ring