I've been playing with pushing the wheels out a bit and a 3mm wheel spacer would be enough (I too have minor rubbing on back suspension w/ 225-50-16 Kumho's). I played with a full 1/4 inch (6.35mm) and it's about as far as you'd wanna go. I've got the BAT kit so there's an inch and a qtr of space between the tire top and the fender, but you guys with lower suspension ... fuggitaboutit. Now where would one get properly made spacers for our bolt pattern anyway?