I use shelves for wheels and stack the air boxes inside of each other with foam between them on top shelf.
You can make something by welding 7/8" bar or all thread to a flat plate. And mount that to a wall. Wouldn't go 1", something smaller will give wiggle room if needed. They take up a lot of space and 40+lbs (full rotor & tire) each adds up quick so make sure it's well secured.