I’m looking at some Fuel 15x8 wheels with-18 backspacing. Anyone tried that size? It seems like a lot of backspacing, but with the wider rim, maybe it’s not that much.

 

I’m running fuel assaults 15x8 with a -16 and they do poke abit but look great

 

I have 15X8's with 5.5" of backspacing. Not sure how that crosses over to mm, though. The stock wheels on a 4wd are 15X7 with 6" of backspacing. I tried to get 6" I couldn't with the 8" wide wheel. They do stick out a little, but not too bad. I'm running 32/11.5 and haven't had any problems other that dirt/mud covering the sides of the Blazer.