[Joe Bob]

Lots of trailers run close to or exceed their weight rating. Fail.
Trailers are left outside and tire walls deteriorate. Fail.
Trailers hit curbs and other obstacles that the tow vehicle misses. Fail.
Trailers get low maintenance, bearings heat up, run low pressure. Fail.
Trailers get the tail end boogie, low pressure tires, wall failure. Fail.