Those Hellas would work better if they were on the outside of the vehicle.
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.
2004 Chevy Suburban 1500 LT in "Expedition White."