I’m rushing to finish this one so I took some pics while I still had the presence of mind to do so. Shooting into the sun and using the iPad, not the best formula.
Still prototyping and fooling around. This one has more rungs. Perhaps more than you need but the request was for a tire carrier that might at some time be used just as a ladder. The tire carrier unit clamps onto a pair of the rungs, but only at one location.
That’s a stock 14″ rim on there, just to give an idea of where wheel sits.