16 7/8 is what I measured from the center of that bolt.I've got the AAL interior cargo setup on my 4 door JLU. I'll try to remember when I get home later this evening to measure (if not feel free to ping me as a reminder).
I've had it a few months and it has been great! Used it on a few trips (short and long distance), no complaints! I have also added the MASS platform so I will be expanding on more AAL items, maybe the large oversized slide for my iceco VL65 fridge/freezer.It’s a great rack. Heavy as hell. You could probably hang the Jeep off of it (rear recovery point maybe?).
I also like that it will almost certainly serve to keep my cooler, tool case, etc from flying forward in the event of an accident or rollover.