In September 2009, I put 2 new CONTINENTAL GATORSKIN 700X23 tires on my road bike. Almost 10,000 kms. later, although the rear one looks a bit worn, they are still in excellent condition and could possibly go another few thousand kms. Certainly the front tire shows virtually no wear. ( I don’t bother with tire rotation, front to back, preferring to replace tires as needed).
I have tried other brands but have never had this kind of success——some tires only last 2000 to 3000 kms. Every ride I do has 3 miles of rough gravel on a portion of the route, so the tires are really tested.
(Incidentally, I received no money from CONTINENTAL to post this.)