I just replaced my duratrac's Tuesday, I had the 31x10.50. They have great road manners and do awesome in snow with little to no road noise. I only had two flats during the year that I had them, I lost a bead while out on the trails and cut a sidewall another day on the trails, the sidewalls are rather thin. They got me where I wanted to be most of the times on the trails. The only reason I got rid of them was I went to a 33x12.50.