When I installed them on my TC I had to fabricate a mounting bracket which I welded to the roll formed channel that runs across the back of the camper underneath because my unit has no rear bumper and the steps require at least a 3" clear mount space below the door and I have less than 2". They came out better than I expected, well, not really in as much as I do metal fabrication I was confident it would come out ok and it did. They are very strong. I had an overweight (as in fat) friend test them for me. He weighs well over 280 and they never even flexed a bit with him not so nicely climbing up and down. I wanted to make sure they would bear the weight... They do.
I don't expect everyone to be able to weld and fabricate a custom mount (like I did) but they are a very well made and stable step.
Worth every penny TL wants for them.
