I just got some 18's for my 325. The tires that are on them are a 225/45/R18. They're a little wider than the stock ones, which I believe are 205 or 215, but the diameter of the entire wheel and tire is only 1.5% larger... so my speedo will be off by 1mph at 60 (I'll be doing 60 and the speedo will read 59, according to several tire size calculators I've used).
I'm guessing there won't be a problem with these rubbing or anything will there? My car's not lowered at all.
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