Yeah, they are. I saw them at Hummer Homecoming in Indiana way back in the year the MTR tires were introduced. They had a cut open MTR and one mounted on the Hutchinson wheels, with the beadlocks. I was having some work done at Lynch, and got them there.
The rear deck rack was one of the best and earliest things I added.
It gave me a good spot for the spare tire, but more importantly, it gave me a lockable storage area in the bed. Before, of course, anyone with a knife could slit the canvas to get in.
A really good addition to any soft top model, or a 4 door hardtop model, like mine.