I would imagine that it is similar to the 1 Ton, if you have the 17" wheels. This is well illustrated in the assembly manual. Basically there is at least one or maybe two pieces of channel attached to the frame. The carrier runs on a diagonal form one of the spring mounts (hanging form a bolt) to the other side of the frame at the back. All the illustrations that I have seen show only a rim stored there. I don't really understand why they carried just a spare rim but I would guess that the whole tire assembly would not fit.
