I'm looking at going back with stock size rims on my 58 1/2 ton along with baby moons and beauty rings. I've done some searching on here, and I think I've got the right answer, but hopefully someone can verify I'm on the right track. Best I can tell from the info I've gathered, the 15 inch wheels used in 1958 were 5 1/2" wide with a 3 1/2" backspace. Is that correct? If the weather cooperates I'm going to the junk yard this weekend to see what I can come up with that will work.