Originally Posted by
Ironfish653
It got caught under the bead. Just below and to the left of the stem in the 1st picture, is a little v-shaped gouge in the rubber, looks like a fingernail mark. That's where a little bit of the tube got under the bead, and popped when it pulled loose. You've said you deflated, shipped, and re-inflated these wheels a few times, right? If you take it all the way flat, 10 psi was mentioned, then when you re-inflate, you almost have to treat it like a fresh installation, WRT making sure the bead is clear and seated properly.
Sounds like the most logical answer. Guess I'm just having a hard time reconciling that it went around 200 miles before failing since the last time it was pumped up for good, when the majority of the other responses say you see those types fairly quick.