rolling diameter is one thing, but rubbing is another which is related with rim width and rim offset. stock is 6.5 wide and about a 50ish offset...so if you keep the 17s with 6.5" width and 50ish offset, then you should not have a problem. but with 225s, you might want to go with a 7" or 7.5" wide rim so that necessitates getting a higher offset. the funny thing is that stocks usually come way high on narrow rims, so 50 can also accomodate 7.5" wide rims. more than likely you will see low 40s. if you get 7.5s, stick with a 45ish offset and no lower than 42.