GXP bottom brackets for SRAM and Truvativ GXP integrated spindle cranksIncludes two spacers that are only needed for installing a MTB crankset on a 68mm bottom bracket shell; spacers are not needed for road cranksGiga X Pipe (GXP)- An external bearing system with 3D forged, heat treated and CNC'd 24mm OD CroMoly spindle integrated with right crank arm; custom cartridge bearings with eight seals and CNC'd alloy cupsItem SpecificationsWeight103gBB/Frame InterfaceEnglishSpindle Interface TypeTruVativ GXPBB Shell Width73,68mmDefined ColorSilver SRAM Threaded Bottom Brackets Bottom Brackets UPC: 710845646188