I fabricated a 1 1/4 in version and put it in the back of my MH after having clearance problems with more than 1 bike clearing a sob trailer I acquired a couple of years ago.
Anything with any weight hanging on the back of a trailer should be done with caution as it will work most times, but the one time it doesn't you will quite possibly loose control from sway problems and that can be a killer.....
measure and figure is all you can do...lol...jem
The Silver Buffalo
Saturn with Blue OX towbar
WBCCI # 14067