Re: New to all of this
Yep, I think friction drive would be his best choice.. Steppin up to a new bike is always cool too, always! But I think, for that 20in BMX, a rear mount friction drive is the only real option.. No room for in in frame mount.. I've run over those plastic BMX wheels with my 4x4 and it showed no damage, pretty tough.. Would have thrashed alloy/spokes wheel..
Be safe, stay free