• Threaded bmx bb was a thing for a while.

    It was called 'euro' and it was pretty shit.

    The small shell and large axle meant tiny bearings which didn't last long at all. I remember mates with euro frames going through a bb a week.

    If you must do it, use a crank like a Profile that has a 19mm axle as opposed to cranks like Primos that use 22mm axle.

  • Ok seen a bunch of cheap ones with 19mm bb, bought a cheap fgfs frame and trying to build under 150

  • seen a bunch of cheap ones with 19mm bb

    Sorry if this is teaching you to suck eggs but you know the cranks are unlikely to come with the bottom bracket right?

    You'll need to buy the bb separately.


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