Right i'm baffled........ordered a set of 3 piece cranks to upgrade from my 1 piece currently fitted to my Mid School Haro Zippo.
Was advised it came with US sized BB kit & axle to suit, axle is for a conversion because it is threaded internally like a 1 piece axle to allow tightning ( frame obviously non threaded & about 52mm internal size)
On inspecting BB kit, cups supplied almost perfectly sit inside existing frame cups being
a lot smaller.
On doing a bit of research appears there's a Mid/US bearing type--does this sound like what i have ?
I am reasonably knowledgable in BMX (at least i thought i was), but this has me pullin' my hair out
PLEASE HELP ME !!!!!!!!!!!!!!!!!!
Thanks Calum