Made of aluminum alloy light weight stylish flashy styling high axial strength and compatibility Bottom Bracket Width 6873mm can be fine BCD104mmCrank Arm length 170mm Crank related holes distance 74mm Package Include One Fordged Crank Set Bottom Bracket 4 pcs Single Chainring Bolts Crank screw crankset bolt Allen Wrench Compatible with Shimano FSA Gaint ATX770 ATX770D XTC 750