Goodyear tires w/Kevlar

I had them on my F-350, Put about 50,000 's on them had 2 side wall bubbles . Goodyear replaced them with a tread depressation. about -$100. Each time it happened it was when the camper was on and it was on the rear. The camper is a Lance 1030 and the truck was a SRW. The third time it happened Goodyear would not do anything. They where to old , 5 years old and it was one of the replacements that went bad again. The tire size was 325/70/18 .The third time it was tread seperation on a front tire and was in the middle of the tire about the size of a base ball . $325 pr tire. I will be needing tires again on my GMC but they will not be Goodyears. I will do some research on here and then deside. Thinking Toyo's And I was running 70 lbs. in whem . the tire max was 65 but I ask the Goodyear Dealer about the right pressure and the Goodyear Dealer said to run the pressure that was on the door. :h