Had a frightening experience driving our 26' class C on Saturday. I was going about 70mph and heard/felt a loud THUNK coming from the rear of the coach. Immediately slowed down and pulled to the shoulder with the flashers on as I was pretty sure it was a blown tire. Fortunately, the coach handled just fine getting off the road. Got out to take a look and sure enough the passenger side rear inner tire was shredded.
Called AAA and ordered a tow. Fortunately, we were only about 15 miles past a decent sized town so one was on the way soon. Called Discount Tire (I knew there was one in the town) and they had the Michelin tire available in the correct size. It was a little after 3pm so I figured we would make it there by 5pm closing time easily. Well, the tow truck driver had significant problems getting the coach up on the bed due to low clearance, but after trying a couple of different approaches and calling his boss for advice, he made it work, but it was 4:45pm. I called Discount Tire again and they said no worries, we'll wait for you. And they did! By 5:45pm we were back on the road.
Don't know why it blew - the tires are less than 4 years old (in fact, they were still under warranty at Discount Tire where I got them so it only cost $35 to replace it). I had checked the pressures before we left home that morning, so my guess is that I picked up a nail or something and the pressure decrease caused the blowout. I think I'll look into a TPMS more seriously now.