I have not seen any 225/40-17s anywhere, so it would have to be 225/45-17s. I really don't care if the sidewall would look a little bigger, I am really just going for better performance. Are the wheel well liners different for the pre-98s compared to the post-98s? I thought that I heard at one time that they were redesigned. If they were redesigned, would it be beneficial to buy the post-98 liner so that I could run the larger tire size?