hmm, to add to the mystery, i was looking at the old titan brochures, on the page that shows the frame (frame painted red with chrome exhaust shown explaining the frame/engine/and brake components), the 2004/2006 (dont have a 2005 catalog!) catalog shows an alloy off-road package wheel at the spare tire location. The 08 shows a steel spare tire. You would think they would have photoshoped a full size alloy in there (dont have an 07 catalog to reference either). They have been using the same frame picture since 04, they just photoshoped a different engine cover when they changed in 07.
maybe im just reading too much into it, haha