Flat Tire

I drove hundreds of miles on a flat inside rear dual, and didn't even know it. In the RV park I noticed that the outside dual looked under inflated when it was actually overloaded. I was lucky, I changed it out, but the tire manufacturer's say to also replace an overloaded tire due to the possibility of unseen stress/heat damage. I remember the Michelin ad. " The most important safety feature on the road is the one that touches the road "