What's the backspacing on the 4" wheel? Most run a 15x3.5" wheel with 1.75 backspacing. I know with my 3.5 wheel and a 1" spacer and its real close to caliper. Cant see running With anymore backspacing than that without caliper clearance issues.
I just re read the op and seen the 2.0 backspacing part. Problem I think you going to have with that wheel is you'll have to run a 1.25 spacer and that will stick the 4" wheel out of fender.
I just re read the op and seen the 2.0 backspacing part. Problem I think you going to have with that wheel is you'll have to run a 1.25 spacer and that will stick the 4" wheel out of fender.