See also:

Trailer brakes
If your trailer is equipped with a braking system, make sure it conforms to federal and/or local regulations and that it is properly installed. Never connect a trailer brake system directly ...

Wheels and tires
...

Maximum trailer loads
Never allow the total trailer load to exceed the value specified in the “Towing Load/Specification” chart found later in this section. The total trailer load equals trailer weight plus its car ...