Presentation packaging, BSA, bracket width 68/73 mm, bearing-Ø 37 mm Sealed industrial bearing, with hardened aluminum bearing cups CONTEC BOX.Thread BSA bottom bracketWhen replacing the bottom bracket it is important to find a bottom bracket with the same standard and dimensions. For the BOX.Thread BSA from CONTEC these are the details:Bearings: industrial bearingsMaterial: aluminumColour: black Bracket width 68 mm, 73 mm Bottom bracket standard BSA Main colour black Type/kind Article Bearing type industrial bearing Version DUB