2.5" backspacing with 15x8" wheels

[gillmore]

I've got 31x10.5x15" tires on 10" wide wheels (stock narrow track). I don't like the balloon sidewall bulge -- which seems very vulnerable pushed out that far. I'm thinking of switching to a 15x8" rim with 2.5" backspacing and keeping the same tires. The current wheels extend slightly past the fender flares (wider than the actual tread). I'd like to keep the tire just inside the fender's edge to add stance width while remaining legal.

Does anyone have experience with this size tire & wheel with 2.5" backspacing (and pictures)? I figure I'll need to do some measurements, but I'm hoping for some first-hand feedback.

I run about 80% on the street and 20% on logging trails. A little mud and snow, but no significant rocks. I've not dropped the psi below 20 out of bead busting concern.

-Glen

 

[Sasquach]

31 x 10.5 on 8" rim is good but the stock cj 15 x 8 wheel is 3.75 back space, those wheels and tires work well with no problems.
With 2.5" back space the wheel will move outward 1.25" and I think you will still be good as long as you are not stock lift.