I just killed my rear tire, a Kenda Kontender after only 600 miles. I'm a big rider and I rode about 200 of those miles on fire roads, but I was still surprised when it went.

People talk about getting lots of flats as an indicator of a dead tire, in my experience, it meant 5 flats in 100 miles (on my last patch job the sidewall crumbled).

I'm now waiting on Fortezza SE's from Performance Bike.