jetsetter
Registered
I would think that anybody that wanted a luggage rack would want the back rest in place for something to tie to. They even make bags that slip over the backrest and sinch down to it to hold it up. Having that 'spine' allows stuff to be stacked pretty high. I usually stack stuff on the seat and on the rack, then tie everything together around the pad. I also built rails into mine that attach in place of the tie down bolts, they make for a nice place to bungee to.