So last week, I got one I never had before. Half-inch plywood:
Naturally the tire was shot and had to be replaced. Ain't no fixin' that.
Speaking of tires, this is what happens inside a tire when you run it too low on air pressure. Think about it:
Click pics to embiggen.
This one wasn't far from shredding completely apart. Can't be good if it happens at highway speeds.