2 trailer tires blow at same time!! Pics

[ToxicWaste]

Has anyone had this happen to them? I'm on I40 in Winslow, AZ and BANG! The typical blow out, smoke and flying rubber. I stop to see that both inside rear tandem trailer tires are blown. I've also been noticing (over the last 1,000) miles that the front tandem outside tire is wearing really funny. Here's the kicker, less than 20K on them!!! Any ideas??? Here are the pics:

[sidman82]

Some times if you don't notice a flat tire the other tire will take all the heat, or load weight. This will not last and ka-boom!! The force of the blow out will trash the sidewall of the tire that was flat and make it look like a double blowout. The funny wear could be a suspension, inflation, or alignment issue.

[geomon]

Could the fact that the tire surfaces look different in the picture be an indicator that the tires didn't go at the same time? Sure looks like different forces at work on both tires.

Were the new tires put on as a matched set? I had a new tire put on once and the other one blew out in a few thousand miles. I guess the new tire height was larger than the one next to it and it caused it to skim across the pavement.

[Red Clay Rambler]

My guess is the same as sidman82.

[ncnewbie]

I had that type of wear pattern on a Bronco one time. Tech called it "cupping" Turned out to be the shocks.