From reading what happened, I am not sure if this is nearly the same as what happened to me, but I thought it was a wheel hazard worth sharing. This happened to me in 2012 after i had owned the rig about 3 years on a trip from Sacramento to Yellowstone.
I had cut off of Eastbound I-80 in Wells, Nevada, to cut Northward to Idaho and I-84. In Twin Falls,Idaho, just after I had gotten on to I-84 my TPMS alarm went off with low pressure on the driver's side rear tire of the trailer. I pulled over on the busy shoulder of the Interstate to walk back to the trailer with the very strong smell of burning rubber greeting me. I found that the tire was rubbing on a shock mount on the trailer frame, I saw an offramp 1/4 mile ahead and slowly pulled up to and off the freeway onto that. I called road service to have them change the tire. A tire guy came out, removed the tire, and found that the neck of the drum with the wheel bearings inside was cracked away from the rest of the drum, causing the tire to flex so far out of alignment that it rubbed the shock mount. This crack went all the way around the tube of the drum neck. Here is a sample drum image taken off the internet for illustration:
I was really amazed that the wheel/drum stayed on the axle until I stopped. I was able to get another roadside repairer come out with the right drum and fix my rig on that offramp road. The next day at the local Les Schwab tire center, while buying a replacement tire, I had them inspect the other 3 drums for possibly having the same defect.
The next time you have your tires off for whatever reason, be sure to have your drums inspected for cracks in the bearing neck areas.
On Edit: The OEM drums were changed out the next year when I got the Disk Brake system added at MorRyde.
