Newbie Tire size question

[AddictionRacing]

That was just on the Toyo Proxes T1Rs that came on the car - 205 in the front, 255 in the rear. I just got the car back from the shop with a $1600 repair bill for the 60k service, spark plug tubes and seals, and front brakes, so I'm going to wear out the Toyos before spending the money on the Falkens. The Toyos really aren't that bad at autocross and I love them on the street.

Thanks again to everyone for their advice and input. I've decided to go with 245 and 275 Falken Azenis 615s when I kill the Toyos.

[AddictionRacing]

I changed my mind and decided to get a second set of dedicated autocross wheels and tires. I got a set of 710s on stock Boxster wheels - 245 front and 275 rear. I love the set-up on higher speed courses, but on the really tight stuff there is still significant understeer. Probably the best part, though, is that no matter how hard I try I can not break the tail loose. The rears are just that sticky.
Thanks again to everyone who chimed in - it was very helpful.