The Rhino-Rack Backbone is a custom vehicle specific designed interior and exterior structure for the Jeep JL Wrangler 4-Door. The 3 mounting plates on each side of the fiberglass roof are connected to the interior frame and vehicles roll cage. Utilizing the interior structure, we have been able to allow for a maximum load rating of up to 264lb or 120kg on the roof.
Purchased after seeing reviews online. Installation instructions are all pictures, and difficult to make out. But Rhino made a install video on You Tube. Followed that step by step, worked out great. Took 2 hours to install with the help of my 16 yr old. Rhino really did this backbone system for the Jeep JLU the right way.