I knew I was getting thin on my gatorskins - cause the profile of the tire was wide, flat and bald. Not sure how many miles I rode with the bare spot - more than a couple - and no flats. I think this tire lasted about 2.5k miles, maybe a bit more -- and had only one flat in that time - pinch flat from hitting a pothole. THe tire had many small cuts in it -- about 1/16 to 1/8 of an inch - where you could bend it and see the kevlar material. Apparnelty they do a good job with puncture protection.

I replaced it with a cheaper Forte (performance brand) kevlar belted tire just because I had it on hand. It rode beautifully this morning -- we'll see how it does with flats and longevity.