I, too, am leery of leaving it all on the back wall, but there are not a lot of other choices on such a tiny trailer. The tongue is at capacity. I suppose I could carry the trailer's spare in the bed of the truck, but I would lose a lot of cargo space that is already in use.
Or I could mount it under the trailer -- very hard to get to, and it would impair my clearance.
I have seen folks with roof racks on their trucks with spare tires up top -- that would raise the center of gravity a lot.
Since the spare and the back wall have already survived six years of traveling (much of it off-road), with the original poor hardware, I am hoping that my upgrade will keep the winning streak alive.
Life is a series of compromises, unfortunately.
