Bike rack on back bumper

I fabricated a clamp on style for my rear bumper. It's carrying 2 bikes. The important thing is to keep them from bouncing. I attached a stainless steel loop bracket on the back of the 5er and screwed through a wall stud. This lets me bungee to the rear ladder and the loop to keep them pulled toward the 5er with no bounce. The bumper may be strong enough for the weight, but the bouncing could break something.