Originally Posted by
apex2apex
+1. If you run any of the top UHP tire in 205/50, they will be perfect on 8". In fact, they will work quite abit better than on 7" or 7.5". You will have a flatter contact patch and sidewall support, which allow you to run lower pressure. My Advan AD08s look just about right on my 15x8 6uls, I think the tread width is over 8". On the other hand, running 225/45 on 8" would not be optimal. Not saying they won't work well, you just not getting maximum grip out of them.
Of course all these talks are for autocross and trackday, on the street it does not matter as much.