Quote Originally Posted by Gutsman Heavy View Post
that trailer for Rodimus looks way to big than the actual armour in the concept pic, probably lots of left over bits, perhaps for a combat deck...
I concur.

There is a lot of mass in the trailer for the armor which seems to be composed of boots, arm extenders as well as chest and waist armor. The armor even if folded does not have enough mass for the massive trailer so the rest must be left separate as a combat deck.