What size tires come on my 1995 Vandura 2500 series it's a sterling by debut

“Sterling” is a *custom van* builder ... You can contact them for information concerning any customizations that were done at the time the van was being built. NOBODY but previous owners will know what may have been installed subsequently. There IS a placard on the van with the build specs by Sterling Vans - it is usually placed on the drivers door jam.