Duckogram, I just figured that I had a tread seperation issue and not a blown sidewall and that perhaps I was a bit over loaded on the driver's side. It got me curious as to the weight on that side of the axle. I am meticulous regarding the tires on my unit, I have a TPMS installed and cover the wheels, continually monitor them, and still experienced the blowout. I'm a little paranoid as about 3 years ago a class C was passing me on I-95 when it had the outer tire blow as it was parallel to me. It caused extensive damage to their unit. Luckily, I had some warning signs before my tire blew and I was traveling at a slow rate of speed, thus causing no damage.
True to what is common knowledge, RV tires are suggested to be replaced anywhere from 5 to 7 years. My tires were date coded the 47th week of 2013. They were Mastercraft Coursers, they were put on in February of 2014 just a couple weeks before my excursion to Florida due to the original Michelins being recalled. Couldn't find any tires and the trip was imminent, so settled on the Mastercrafts.