Those Hellas would work better if they were on the outside of the vehicle.
J/K.
Seriously, though, where is the spare tire on the Xterra? Is it outside of the truck or inside? One of the things I hated about having a Subaru wagon was that if I needed to change the tire, I'd have to unload most of the gear from the back as it was under the floor. On the Taco I don't even have to open up the back of the truck: The jack and tools are in the cab and the spare is under the bed, accessible from outside.