[jmh61]

Thanks for the replies.

Crikett, Thanks for the links, but they don't have them either.

racer, Looks like I'm the guinea pig.

I called a friend that has the Yokos on his Lotus. He said that they're OK on the track but they have to get warm, so probably not the best for AutoX.

It appears I've either got to go to DOT slicks, Kumho V710 et al, and cart tires to the track or go to a harder compound tire like the one of the Toyo's, RA1 or R1R, or the Hankook RS-3.

I think I can use a 225/45/15 instead of the 225/50/15 if needed.

I guess I've got to decide if I want convenience or to be as competitive as possible.