No you should not have any rubbing with the size of tire. I am riding on a set of 18x7.5 225 45ZR18 and i dont have any rubbing problems. Its also dropped with Tein Basic Coilovers. So you should be alright with the 215/45/18.
so can folks run the stock RX-8 wheels & tires? I've seen various posts & opinions, but no real consensus. I do believe that the 225/45 ratio can throw off your speedometer and all, but does the setup rub?
I have seen a few mazda 3's with the RX-8 wheel package and havent heard much on rubbing in the wheelwells unless you got a nice mad drop on your ride. With out a drop you will be fine, but will have a ugly gap. If your looking at tire sizes, 225/45/R18 is not a bad set up. you will not rub. trust me i have 225/45/ZR18 on my mazda 3 HB and its dropped. Lower then i want, but i have no rubbing.
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