5th Wheel Broken Stud Theory

Many years ago(1975 or so) my friend and I borrowed his fathers Class C and drove to Florida to stay with my parents in south Miami for two weeks. On the way back we noticed a vibration so we pulled over and everything looked OK. Started the MH again and noticed the same vibration above 5 mph. When we shook the outside rear dual tire it was loose and riding on the hub extension the only thing keeping it on the hub was the fender skirt. We had 3 young kids 2 years old to 5 months old at the time. We saw every stud was sheared completely off when we took off the wheel cover. We were very thankful it did not come off we did not crash with our young kids in the MH. This happened at 1 or 2 in the morning and no one stopped to help. Finally someone stopped to help us going south on I95 we were going north and he found a gas station that was open with no mechanic 20 miles away. The guy running the station had the studs and allowed us to pressed them in. The only thing that we figured is new tires were put on before we went to Florida but the rims back then were just flat if I remember correctly and over about 3000 miles of travel worked loose and the vibration work hardened the studs until they failed. Having said all that I think a TT sees more vibration than a MH or car and if the rims are flat like my boat trailer I can see were that can happen. Rough roads could be 10 times the static loads that those studs can see, all in shear.