Originally Posted by cossie1600

As long as you stay close to the stock diameter, you should be okay. I once used 265/30/18 on my car, it didn't seem to do any harm. I plan to run 275/35/18 all around on my 18s. I believe stock is somewhere around 26.5" in diameter, there aren't many race tires in that range. I believe I was looking at diameter that were over 25".

I run 18s because I am on a limited budget, cant afford to buy another set of tires.