OK, just ordered new tires and wheels for autocross. Let's just say my street tires didn't cut the mustard. The biggest headache was determining if I wanted a 235/45 all around, or a 235/45 in the front and 245/45 in the rear (66 coupe, rolled fenders, 17X8's/4.75"BS). With regards to racing, what size tires are you running and why? I'm not rich, so my logic is the ability to rotate the tires may allow me to run 2 seasons vs having to purchase only two tires as they wear (better use of limited funds). What is your approach when it comes to tires?