Originally Posted by etex211
The pin holding the ball failed first when they did the crush test. The crust test begins at 5:10 in this video.
I understand the hitch better watching this. I wonder though, what keeps the coupler block from spinning around? If the king pin is behind the ball while towing and you jam on the brakes, what keeps the coupler block from spinning so that the kingpin would go to the front of the ball? That would be a scary thump!
I don't like their test - marketing hype. The tested hitch didn't look like it had the same offset as the one being used in all the previous shots. That offset would affect the results significantly. The test wasn't done on a flat surface, and the most severe loads will be perpendicular to the direction they loaded. Not saying it will fail, but that the test isn't too representative of the in use strength. Also concerning that the ball failed first. It should be extremely strong in that axis, and it was, but the failure was very abrupt, which is undesirable. It would break a lot lower with a lateral load on it. I would question if it would provide an adequate factor of safety at their listed capacities. The failure of the frame was better as is bent and distorted without breaking. You'd see an issue before it broke (hopefully).
I would also expect that it would cause higher loads on the rear axle of the tow vehicle and unloading of the front axle since it is pushing the center of the hitch back from the ball. Again, not bad, but something that could bite someone close on weights.
I see the draw, it's pretty slick, but I'm not sure I'd invest in it.