I LOVE my Kenda Gnarly 6-ply rears. They hook up great, never had a puncture,reasonably priced and are wearing great. When I ordered my fronts, I did alot of research and they didn't have the 6-ply Gnarly fronts yet. They said the front 4-ply Klaws where run in a dessert rally and held up great. WELL, I ordered them. Nobody, including who I ordered them from, mentioned the side walls are only 2-ply. These are the worst front tires I've ever owned in my life. They have more punctures then a pin cushion and they're atleast 95% tread. I'm going to stud them and use them on the ice this winter. I don't know about the rears but the fronts are garbage for trails. Like I said, the rear Gnarlys are great. Just my opinion.