Found this :
The safety struts looks to be the answer to my problem.
However it does not reinforce the entire length of the bumer from left to right.
What if the tear happens in and around the hitch receiver that is away from where the struts are ?
I'm asking the following q to the manufacturer:
"I'm intesrested in your safety strut.
But I have some doubt about how it works. Can you please help me ?
It looks like the struts only reinforce the area where the bumper meets the frame. However, if I put the hitch receiver (bike carrier) in the middle of the bumper, how does the struts prevent the twisting the middle section of the bumper ?
The bumper may still be attached to the frame, but the middle section of the bumper maybe twisted, ripped, or may not be hollow square anymore (hollow circle maybe )? "