My rears (PS2s) are right at the wear bar -- only for the inside of the inner most tread of the right rear tire. All the other treads are above the wear bar. Is it still OK to do a HPDE track day on these tires (assume dry track)? No chords showing.

 

I'm interested in the answer as well. I have a couple sets of rears that are a bit light in tread for the rainy months, however I'm interested in using them on track.

 

I wouldn't. Maybe if you trailer your car to the track and inspect the tires closely after every session... but if you're driving to/from the track, definitely not.

-mike