We spent the night at a Flying J, before we connected with a hometown friend living in Illinois, and woke up to a softball size bulge in one of the 5th wheels tires.
The bulge wasn’t our only problem..
I found a mysterious slit on the inside of the side wall. Unfortunately it wasn’t the first one. Last month we changed a tire with the same problem. At the time I checked all the tires and didn’t notice the slits on the other tires (could have been hidden in the wheel well). There isn’t anything rubbing. I check the rest of the tires, and found the same slit on another tire.
This became a great time to teach our two younger boys how to change a tire.