I have just recently been running the Toyo RA1 as my track tire, at full depth. I would really recommend anyone who get these tires to have them shaved the 4/32nds prior to mounting them on you car. I did not do this and the tire is very squirmy under braking and turn-in. Now that the tires have worn down significantly about 2/32nds the tire grip is as good as any R-Compound that I have ever run. All in all though I would say that the Nitto NT-01 is a much better track tire, if they make it in your size.