Joseph Donnelly
TDR MEMBER
I lost 2 tires to complete failure and 4 others were on the way with bulges under the tread. I was careful about proper inflation, checked before each trip. The tires were certainly not overloaded with a 5500 lb max trailer weight and each of 4 tires rated at 2400+. So, overloading and underinflation can and do cause problems, but some failures aren't so clear to diagnose.