Two systems. Both from Amazon. The one on the right is a post that sticks out and goes through the hub bore. It hits a stud in three spots, vertically. I spread the load out over two studs, horizontally with the backer board. The other system does the same but has a “claw” that sticks out and grabs through the spokes. It hits the stud four times, vertically. I weigh 180 and hung from one and it did not budge. I find all of them very sturdy. No concerns at all. Just be sure u hit a stud and use hardware from Lowes, etc. The crap that came with it was from China. No thanks.What are using to keep the wheels on the wall ? And how secure is it ?