Depends how you drive. You could get 20k out of them.

I put 5k miles on mine this year with one auto x. I expect them to easily last through 2014 with a couple auto x and road courses in the mix plus another 5 k miles. They aren’t as sticky as brand new (judging by how much rock noise I would get driving down my street on first startup) but they still seemed to be holding strong with good tread depth when I put the car away for winter.

10k seems very attainable, 15-20k maybe not out of the question with no track time. I’m actually very impressed givin the 60 treadwear rating, I’ve had 220 rated tires last less than these.

Depending on how much you drive each year remember that the tire will age and get hard long before most drivers have that many miles on their Vipers.