Has there ever been a documented case where an over weight toad has caused an accident or even record of a damaged frame?
BTY: It would be good to see if one could find out what the limiting factor is in the tow rating. Often times the limitation is tongue weight do to the fact that excessive tongue weight will lift the front end, which dramatically changes the front end alignment, creating unsafe handling. When I first put my motorcycle on the back of my coach, I had some additional things that contributed to the extra weight on the rear. Even though everything was within spec weight wise, it was a handful to drive. I found a way to remove 75 lbs from the rear, and put it on the front. Just that 75 lbs made a world of difference. If the limiting factor is tongue weight, a tow dolly has very little.