I am running 32x11.50 BFG All Terrains on 15x7-4" BS Cragar Black D's with a Daystar 2.5" lift. I'll give you a little extra insight from my experience since that is what I planned to do at one time too. So, I researched until I was blue in the face on here and LOST about what would and would not fit on an unlifted KJ. I thought I had it all figured out. I got 15x7" with 4" BS because I wanted a little wider stance (stock wheels are 5.5" BS). I also went with 235/75-15 tires (28.9x9.25 for comparison). I knew I would need to pound the pinch weld, trim the front fender liners a little, and add a clevis lift, but I was fine with that. Got it all installed and it was fine, except when I would flex the rear, even going into a parking lot from the road, my rear tires would bump the fender flares. 4.5" BS wheels might have fixed this issue. Not sure exactly how much they would have needed to move inward to clear the flares. I decided to add the 2.5" Daystar lift. I am very happy with my choice now. Been running this setup for almost 20k miles now and love it.
Here is mine with 32x11.50's
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Here it is with 31x10.50's
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Here it is with the 235/75-15 after lift
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Here it is with the 235/75-15 and only a clevis lift
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