bjackson wrote:In your case, the Dunlop SP Sport 600 tires are not the equivalent of the "Extreme Performance" tires in our rules. There are only a handful of those tires and none of them are available OEM from a manufacturer, except on some extremely expensive cars that typically don't show up for our series. If they did show up then they would be allowed to use other "Extreme Performance" tires.
Good enough. So what is the definition of "Extreme Performance" tires for our rules? There's a couple of random tires that fit similar criteria, but aren't on the list, such as the Toyo R1R, Federal 595RS-R, Yokohama AD08.
I definately agree that despite the fact that SP600s are definately not as good as the Star Specs despite the fact they're both 200 treadwear tires listed as "Extreme Performance" tires. I'm just trying to figure out where the line is, so I can plan my tire purchases accordingly