BRGs are tough but I guess a 1/2 inch bolt is too much. The wife did an errand. Came back and when we tried to leave again an hour later, the passenger rear was totally flat. Jacked it up and looked for the problem and saw this! She said she felt a thump, but that was several miles away. So the BFG got her home. I was a couple of months out from new tires, mainly because the fronts were pretty well worn, but this bumped it up. I asked what tires she wanted in it this time. She says BFGs again. I tend to agree. Have no idea what a 1/2 inch bolt is doing in the rear tire. You would think the front would run over the problem first. But there it is.