Bethnal Green Bikes new frames, like, totally 531!

BMX has become quite seperate from its roots though, far more than fixed wheels bikes have.

If you can't take it on a track, it isn't a track bike. Using your argument, why not call Unipaks Keirin bikes? Or £79 full suspension MTBs downhill bikes?

unipaks are keirin? i don't think that really follows, a brand mentally equating a fairly specific frame manufacturing tradition, regardless of quality, i don't see this working.

as far as mtb's i guess you could say that, but again, i think downhill is a more specific term, like a park bike or trails, not simply a bmx, road, mtb, track, etc. you've got to at least stay within the same degree of generalisation. however, both the halfords special and the fine tuned downhill bike fall under 'moutain bike' even though the former is never going to see a mountain.