71 Duster Wheels

10" BBP brakes are 2.5" wide, the SBP brakes are 1.75". But there are also differences in the axle flange offset from the housing and the backing plate offsets as well, which is why the change in track width per side is between a 1/4" and 5/16". Overall the SBP 8 3/4" is 57 1/8" drum to drum, a BBP a body 8 3/4" is about 57 13/16".