We run these tires on both of our car trailers because the are 6 ply and hold up to the weight. The only reason we had to buy these two was one of the guys was parking the trailer and rubbed up against something and ripped the sidewall, otherwise we have never had a problem, in fact the spares on both trailers have never been used. Great tire, get the 6 ply, and don't worry. These would be great on travel trailers that keep loosing those cheap imported tires. Dave's Garage Hot Rod Shop Simi Valley, CA