[Scufty]

stricklypersonal I think you are mistaken?

the tires I have are 28x10x15 I put them on the 15x8.5 rims with the 3 and 5/16 backspace...the tire does not come out hardly at all on the outside...just comes IN on the backspace. They seem to be working fine. FYI they are also on the front of the car and the previous rim and tires were 15x10 with a 4 and 7/8 backspace. I saw no reason that there would be an issue going to a smaller backspace? So far so good. pretty tight though ( the old set up was very tight as well mind you.
When I put the new rims up againt the old ones the measurement from the lug holes to the front edge of the rim was the same on bot the sets....the backspace is where the inch and a half was made up 10 vs 8.5