Tire Tread/belt problems of the 2004 Dodge Ram 3500

Tires less than two years old, and one tire was defective. That was replaced. Last week two tires blew out that had less than 6,000 miles on them. The tires were on the 5th wheel camper. Mission tires. They did not look like they wore out, the tread was good. The tires could not handle heat and the load when the tires blew out. The manufacturer was mission, and this was a keystone camper. These were the original tires that came on the trailer. Consumer talked to keystone trailers, and they were not going to do anything about it. Consumer felt that if he spends more money and moved up a different size tire the camper should be okay. Both tires disintegrated and there was nothing left of either tire. Listed manufacturer as unknown, these were made by mission. The first one was on the passenger's side front axle, and the second one was on the driver's side rear axle. . The speed was 65 mph when the blow out occurred.