I've got 18x8.5 with 235/40/18 and I don't rub at all (I've got stock sport suspension). You shouldn't rub either on yours IF you have the stock suspension...however, if you do plan to lower it, it MAY rub.
I'm waiting on my UUC springs and I'm hoping I'm not gonna rub
The 19's will definetely look better, but I chose 18's because I wanted to get some wheels that weight as close to my stock 68's.
Like others have said they both should fit fine with the stock sports suspension. But if you plan to lower it than I think the aggressive offset would rub in the back on a sedan. I think even with a drop they won't rub on a coupe though.
Neither size will rub.
however, if you're looking for performance I'd suggest the 18's.
Because you have a much better offering of tires.
19" tire selection is incredibly limited compared to the 18's.
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