Collection: BMX Bottom Brackets

BMX bottom brackets are where the crank spindle runs through the frame, and getting the right one comes down to matching two things: the frame’s bottom-bracket shell and the crank spindle size. Mid, Euro, USA and Spanish systems are not interchangeable, even when the crank itself looks similar.

Blue Groove’s range covers complete bottom-bracket sets as well as replacement bearings, cups, retainers and small service parts. Check the frame standard first, then confirm spindle diameter and any bearing, spacer or threaded requirements before ordering — this is one of those parts where close enough usually isn’t close enough.