LarryJM - Thanks for your feedback. In our case, to the best of our knowledge we did not experience road hazards, never go over 55 and we were definitely and haven't overloaded. We weigh and know we were well within weight. So, we must've experienced that SINGLE SIGNIFICANT factor at one time or another. Since this was our first failure in the five different towables, but the longest we've owned an RV. I'd have to say that age must've been the factor. The spare, according to the tire shop, was the only good tire and never used. That right there goes against one person here stating that these tires do not have a good reputation.