Need some help deciding on a summer / autocross / lapping tire!

[Turbo II]

Originally Posted by P71

Uh fellas, the Star Spec lost the latest GRM ST-Class tire test, badly. Even the old RT615's beat them. The XS is the new fast king, the RE11 is right there as well, and the RS2/3 and the Rt615 are fighting for fastest for cheapest. The Rt is still the longest lasting and has best grip at end of lifespan

I heard the same from a friend who was talking about it elsewhere. We're both running the RT615s.

GRM June 09 issue. The Kumho XS seems to be the king. The Kumhos were about 1 sec faster. 34.x versus the Falken at 35.x.