I've got to defend Duro's. I have seen what Larryboy went thru with his and if mine did that I would feel exactly the same.
I'm on my 3rd set of Duro's now. I did have troubles with the first front cupping badly, but once I figured out that it likes about 25 psi or less (vs 30+) that problem is gone.
I get between 5000-7000 miles out of a set depending on the time of year. I seem to get better mileage in the winter :?
My guess is that I ride more dirt road miles in the winter and Florida roads get mighty hot in the summer so that cant help.
But you have to help me. If you don't then I have to ask complete idiots for help and you know how unreliable they can be.