Got my bike in April 2007. I have since put on about 3000 miles on it. This morning on a dicey descent I noticed I was fishtailing while hitting the brakes. I just thought it was from a wet road surface. Just now looking at the bike I can see the rubber on my rear tire is completely gone in a few sections and I can see the underlying belt. Is 3000 miles typical tire life or should I be getting more out of my tires? The front tire looks fine in comparison. I did put about 150 trainer miles on it over the winter, and the rear tire was actually looking square compared to the front one. Just glad I didn't get a flat during this mornings ride.