Why bother, just get a new set of Pilots from Jon B for $869 ( I believe that is what he has them for ). The Kumhos are not out in 18's , and probably won't be for the forseeable future. I have run 11.7's with 18's ------ 45 lbs in the front, and 19 in the rears. The Michelins are darn decent at the track, and a ton better than their predecessor - MXX3s. Just a thought, but while the price is so reasonable, thought I should pass it on.