Quick question, what size Toyo R1Rs did you use and how much wear did you get out of them? I searched and found you said: "The rears have about 6,000 street miles and 3 track days. They are nearing the end of their life" How long did they up lasting until they completely gave out and did the grip stay the same throughout their life or did they heat cycle out fast? Thank you, I'm thinking about these tires but I will track days so I'm concerned how long they will last.