See also:

Weight of the Trailer
How heavy can a trailer safely be? It depends on how you plan to use your rig. For example, speed, altitude, road grades, outside temperature and how much your vehicle is used to pull a trailer ...

Why Safety Belts Work
When you ride in or on anything, you go as fast as it goes. Take the simplest vehicle. Suppose it is just a seat on wheels. Put someone on it. Get it up to speed. Then stop the vehicle. ...

Adding Equipment to Your Airbag-Equipped Vehicle
Q: Is there anything I might add to the front or sides of the vehicle that could keep the airbags from working properly? A: Yes. If you add things that change your vehicle’s frame, bumper system ...