Trying to figure out what would cause this. During a camping trip last weekend we had a tire blowout on the trip up, about 2 hrs into the drive. No biggie I throw on the spare which is brand new, had put on 3 weeks prior. We camp for the weekend, then head home. 2 hours into our drive back the brand new spare blowouts as well. There were no vibrations prior to it blowing out. Never went above 65, in fact the drive back was extremely smooth up until the 2 hr mark. This time though all 5 lugs were sheared off, causing minor damage to the camper. Luckily I was already in the process of slowing down as I heard the tire going, before the rim snapped off. The tire and rim flew across 2 lanes of freeway and went down a large ravene, I was not able to locate them so that I could examine the tire to figure out what happened. The first tire the treads separated from the tire. When the camper was loaded onto a flatbed I looked at the damaged wheel and it was moving fine, not locked up an no wobble. 2 bad tires? Pop up is a 2014 rockwood HW276. First blowout was going uphill, second downhill, literally 2 hrs into the drive each direction.