Does anyone know the difference in a 04 supercab and supercrew in the exact same configuration?

 

Base Curb weight

Supercab 4x2 144.5" wheelbase 5244# (5.4L)

SuperCrew 4x2 138.5" wheelbase 5305# (5.4L)

SuperCab 4x4 144.5" 5.4L 5495#

SuperCrew 4x4 138.5" 5.4L 5606#


All weights are for stylesides. From the Truck Source book page 39 of the 2004 F-150 section.

 

Why is the wheelbase different? Is that for a long bed?

 

I did a "normal" supercab which is a short box 6.5' and the only option for SuperCrew is the 5.5' box as I fugured this is what most people will compare.