I'd be kind of surprised.
I track the hell out of my Falken tires and don't see traction drop off until you start getting down to around 2/32's of tread.
For example, I have 4.5 track days and a number of autocross events on my current Falken tires and last weekend they were still pulling 1+g's on the autocross. I might even run them at Thunderhill next weekend as they are mostly still around 3/32 tread. Will decide after I autocross them again this Sunday.
ETA:
Quote:
Originally Posted by glassman
The instructor i had with me at Las Vegas with me said i "fried" the tires. "Got em too hot", last run of the day, they got a little slick...
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Just wanted to add that you absolutley can overhead the tires and "fry" them for that session which I've done but the tire has always come back when cooled off.