Ditto on the 'don't use a bumper hitch without reinforcements' advice...personal experience...going down the road, people startzed pointing at our rig....our bikes are on the ground, dragging....the bike rack and the connections between the bumper and the frame rails stayed intact...what happened was, the thin metal of the bumper got jiggled and joggled one two many times, and the walls of the bumper peeled open like a banana...the bikes were at a 45 degree angle, and didn't go all the way flat only because the ground blocked them from falling further...
That would have been hugely dangerous and a huge liability if the bikes had actually disconnected from the trailer, as generally a person can be responsible for any damage caused by a falling load. I ride a motorcycle as a daily driver, and realize how extremely hard it would be to avoid a crash when two strapped-together bicycles suddenly appear on the road ahead, bouncing around unpredictably....run over those with a motorcycle or even a car, BIG problems....alternative of swerving could ALSO create big problems
After the fact, I got a welder to take the factory bumper off and replace it with one of much, much thicker metal...and even then, I only use the bumper rack when the truck bed is full
It's not the dead weight that's the bumper-killer...it's the lever action of however much the bikes weigh. extended above and behind the the bumper, bouncing up and down with every dip in the road.
Truth to tell, folks warned me about it.....but, given that I'm smarter than everyone else, I took my own path until they were proved right
Glenn and Toni
2019 Jayco JayFlight SLX8 264 BH
2019 Ram 1500 5.7 3.21 gears
Reese round bar w/d with sway control