I have 225/40/18 with stock suspension. no rubbing at all. I think if you go 7.5 inch wide it will rub with 18's. not sure though
18" enkei cdr9 w/ kumho 225/40/18 5% limo all around alpine head unit jl xr series door speaks 2 jl w3 w/ppi 2600 and 1 farad cap b&m clear head lights dingless