I bought a set of used rims. One was just slightly dented. Mounted a set of tires that were just a fraction of a millimeter bigger in diameter than normal. After pumping the tire up to 100 psi I went inside pleased with myself & my sharp purchase. 10 minutes later was the big bang. After investigating, the tire was still mounted, but the tube had shredded itself. Not I saw the tube emerge, explode, and let the tire settle back down on the rim apparently seated did I catch on what happened..