My first set lasted about 27-28k miles. (some tread left, but not much)
However I was very rough on them for the first 5k miles and the last 5k miles.
I figure ~35k would be an average lifespan. A fair bit more if you don't autocross (My first set saw at least 5 autocrosses)
My new set still looks new after 5k (For ref - my original set did not - oops
)
