I'll tell you this much... Ratchet-strapping, redundant chaining, and roping the hell out of it to the luggage rack, to make sure that 4 sets of harness would have to break for that tire to go loose, will hold it more than fine on the freeway heading up north. The minute you wheel with it up there, though, it will shift and dangle off to the side...
Besides that, no, and I am most interested as well...