Crank Mtb Integrated Crankset Hollowtech 104 Bcd Crank 2 Crowns Mountain Bike Connecting Rods 32/34/36/38/40/42T Chainring. If you need other colors of the bottom bracket, please contact customer service for replacement, thank you! Note: The colored ones are equipped with colored bottom brackets and colored screws. Other colors are black bottom brackets and silver screws. Product name:Mountain bike hollowtech integrated crankset Material: Aluminum Alloy Size:Crank Arm length 170mm BCD:104mm Crank Bolt Diameter: 17mm Number of chainring teeth:32/34/36/38/40/42T Bottom Bracket Width: 68-73mm Weight: About 672g(only crank) Compatible with: Shimano, FSA, Gaint ATX770 ATX770-D XTC 750 Features:Made of aluminum alloy, light weight, stylish, flashy styling, high axial strength and compatibility.