Inner trailer tire sidewall blowout

Hard to say. Goodyear cap it looks on a Michelin case. Too many possibilities.

 

I usually see sidewall blowout after a tire has been run flat. Possibly it was stressed (old case, run flat, case damage, etc) before the cap was put on. Just no way to know without inspecting. And, sometimes things just fail.

 

My best guess, after seeing this type of blowout several times is that something got caught in between the tires and it created a soft spot in the sidewall.

It is possible that this was just a sidewall failure after a tread separation occurred.

 

We have had several side wall and other blowouts sitting in the yard. Actually had the neighbor across the street call me once to make sure I was okay.
all of them were caused by something penetrating the rubber and either damaging the steel cords or allowing road salt to eat at them producing a ticking time bomb.

 

I bet it has a old date code on sidewall.. once age kicks in they blow running empty sometimes.

 

@SmallPackage may be able to tell.
On my phone it looks like the inner liner leaked. Something like this…

 

I has one blow out at a stop sign. How many miles on them? My tire the outer shell separated but inner casing stated together. Sounded like a shot gun blast.