Charles, I got 39,000 out of mine and that included a couple of track days and an autocross or two. Wasn't quite down to the wear bars, but they were starting to get a little noisy.
I ultimately replaced them with another set of Goodyear F-1's, but I looked at some Kumho runflats. Heard some good things about them. They're cheaper than OE tires, but they have less tread to start with, I think about 1/16 or even 3/32. I only drive 4-6K per year. Living in Michigan, it goes away for about 5 months. This set will probably dry rot before they wear out!
I ultimately replaced them with another set of Goodyear F-1's, but I looked at some Kumho runflats. Heard some good things about them. They're cheaper than OE tires, but they have less tread to start with, I think about 1/16 or even 3/32. I only drive 4-6K per year. Living in Michigan, it goes away for about 5 months. This set will probably dry rot before they wear out!