Gordy, I am still running the good ole 'KUSIER' setup! /phpBB/images/smiles/icon_wink.gif
Actually the 18" Kumho's were sent to me to test, however the size unfortunately just isn't big enough.
They were designed for the Porsche, and the LS-1 Corvette. They will work fine in either of those applications... but the tires being a 285/30/18 are just too small! Mounted, they actually have a lower overall diameter, than the fronts! /phpBB/images/smiles/icon_eek.gif
The new Kumho is an excellent tire (extremely light! /phpBB/images/smiles/icon_smile.gif ) However... for us Z-06 guys... not enough rear tire! Although... if you wanted to run a 17X12...they do also now have a 335/30/17!
Peace,