What a mistake I made. I was talked into running STU because they didn't have enough people to make their class. I agreed thinking that at least I wasn't going to have to change tires. I guess that's what I get for being lazy. Jim didn't bring his F500 so I drove my car on street tires. Never again. I finished last out of 5. No traction on the starts (2.4x 60' times), no traction in turns, no traction in transistions... just no traction period. I would have faired much better running SM (which I was signed up for originally). Live and learn...