I positioned them directly over the 6M holes in each base plate.
They are 1 1/2" x 2" and less than 1/4" thick. Then I carefully mocked-up wedges out of blue foam insulation to go on top of each base plate. I started by mounting the stock base plates, attached to the internal frame provided by Rhino Rack. The the three bases on each side also are not in line. The key to this approach is to recognize the flat mounting surfaces on these base plates are not level from front to back and slant slightly outward. I started with the Rhino-Rack bases (X6). It is very very stout with 6 mounting points instead of 4. It is about as low to the roof as possible, a little over an inch above the Jeep roof. In the three photos you can see the mounting system I came up with. I ran over to GFC last week and had my RTT installed. Also, the required cross bars will produce wind noise. With this option the RTT appears to sit a bit higher. This inside framework then bolts directly through the roof to the mounting feet on the roof (x4). The supporting framework is bolted directly to the Jeep’s roll-bar. The Maximus 3 option is attractive primarily due to the strength of the framework. This should create the least amount of wind noise of the two options. I like this option because the tent sits about as low as possible, and when on the highway the air will flow cleanly between the camper bottom and Jeep roof.
There is a YouTube by Justn B McBride that shows a very slick set up where there are simply small brackets that bolt between the Rhino Rack top base plates (圆) and the aluminum GFC mounting blocks. There are many positive videos and I have talked with real-life users that seem happy with the setup. The Rhino Rack Backbone option is popular and seems to be robust enough to handle the RTT. Finally, minimal wind noise is preferred. The mounting hardware must be strong enough to endure the mechanical stress and strain of overland travel. I want the tent to be as close to the Jeep’s roof as practical to keep overall height as low as possible. Thank you in advance for any experience-based insights on the two options. I am studying two different options to mount a GFC Platform RTT to my 2017 Jeep 4-door Rubicon.
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