Is tongue weight static weight or dynamic weight?

[Greenman]

Learned it the hard way.

 

[Gillbot]

I would never put something like this on a car (I don't mean a motorcycle, I mean those generic platforms that people put their beer coolers and dead deer on), for exactly the reason you mentioned - the leverage it puts on the receiver is NOT the same as putting an equivalent trailer tongue weight on the ball. Unibody cars just aren't meant for abuse like this. A ladder frame truck is a different story.

Yeah, I'd never put anything like that on a car. Maybe one of those tiny ones that can hold a simple cooler but that's it.