Just bought a Zhi 20" and the crank arms have a bit off movment on them i think this is due to the spindle in the BB being wore as i tryed the arms on another bracket and ther fine so im just wondering will most BB's for a 20" trials bike fit mine and let me bolt my arms on? IE the one in this ebay link
http://www.ebay.co.uk/itm/Onza-Isis-Bottom-Bracket-NEW-BOXED-127mm-68-73-Shell-Includes-Fixing-Bolts-/251086004834?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item3a75e46262