I had two blowouts today, both of them sounded like gunshots. First one was a metal shard that slit the tire. I overlooked it and changed the tube. Second one was a bulging tube which bulged out of the slit in the tire, and BOOM! The slit was pretty small but the tube still exploded. I cut a section out of the old tube and used it as a backing for the tire. Sure hope it holds...