I don't know I have never stuck with Michelins for very long. I bought two pairs of Veloflex Paves at the beginning of the summer and I still have one on each bike. The rear on my track bike will have to be changed before any of the others, but the pair on my road bike (which I used when I was in Europe in the summer as well) are still going strong. They still have the little "tread" pattern on them. That's long enough as far as I'm concerned.