We were done cutting a yard, loaded the mowers on the trailer, fired up the trimmers and were trimming the yard when we heard (quite literally) an explosion! Looked around, in the sky, so on anso forth. Done trimming and put trimmers in the racks on the trailer and there is an about 5" hole in my mower tire! Blew from the inside out. Luckily it didn't blow with someone on it. Guys at the tire shop said they've only seen this if it has fix a flat in it. but mine didn't. Faulty tire I guess. But the machine has new sneakers so we can rock and roll.