15x4 & 15x7 stock steelies?
there is also a 15x6.5 and a 15x8 trailduster/ramcharger stock steel wheel. none of our pre-80s muscle/passenger cars ever came with a 15" wheel narrower than a 5 1/2 that im aware of.
many lebaron/dipps/5th avenues had factory 15x7 steels. even 1/2 ton vans and trucks