Fsa bb30 road bottom bracketos6000bb30 is a design where the bearings press directly into the frame and seat against cir clips installed in machined grooves inside the bottom bracket shell bb30 compatible shells have a 42mm inner diameter id and have no threading bb30 bearings have a30mm id that directly fit bb30 model cranksets with a 30mm outer diameter od spindle features material chrome steel bb30 cartridge bearings bb shell width 68mm roadbmx includes wave spring cir clips and