I am running 32"X11.5" dunlop Rovers as a daily driving tire on my Pathy 6 spoke rims (stock offset and backspacing I believe). I have no rear bump stop extentions and I am running the SLR 3" econo lift wiith the # pack AALs and a new OEM spring pack along with 2" SLR shackles.

At Moab this past April, I rubbed a ton in the back on the body even with stock offset rims.
After looking at my pix f the trip, I had ridiculous flex in the rear axle which caused the rubbing.
I will be installing the rear bumpstop extensions so I can run my 285-75r16 Trxus MTs on 16"X8" 5" BS rockcrawlers with minimal/no rubbing after sheetmetal trimming.

I hope that helped a bit.