As was mentioned before, you will gain some room in length when you compress the forks and the mirrors can be folded in. The bags bars are 32". Just looked again - the levers are the widest point at 39" or so. The handlebars could be removed from the risers easily (4 allen head screws) and make a lot more room in the trailer.

You say you are an engineer?

Scott

Eschew obfuscation.