Had the shower door shatter for no reason. There was no one in the trailer. Talked to someone else who had the same thing happen while watching Tv in the main area. He said it sounded like gunfire when it went. Never did find a reason mine went. Trailer was about 5 months old at the time. Little pieces of glass went all over the bedroom and down the stairs of my 5er into the kitchen. Mine was replaced under warranty but there was a bunch of discussion before they agreed to it. I know they thought I broke it, but I really didn't.
Can't speak to your tire question.