PROBLEM: tire carriers that allow for fuel can storage screw up my departure angles and visibility on the trails I like to run, but 40" tires eat up gas like crazy. I don't want to store gas inside the jeep, but also don't want a big Jerry can hanging somewhere outside the Jeep.
SOLUTION: RotopaX makes very nice low-profile cans that can be mounted almost anywhere with a little creativity. I looked at various mounting locations and found that the tailgate hinges offer a perfect location.
THE PROTOTYPE: I cut two 3" pieces of 1.5" C-Channel, and one 12"x6" aluminum plate. I drilled holes on the channels to attach to the inside hinge bolts, with the channel opening facing down so you can fit a box wrench in there to tighten the bolts. I then positioned the aluminum plate over the channel pieces, and drilled holes to bolt the plate on. Finally, I centered the Rotopax gas can over the aluminum plate so it did not interfere with the lights, license plate, or operation of the tailgate and marked the center hole with a pencil. I then centered the Rotopax mount over the pencil mark, drilled and bolted that to the aluminum plate. Please keep in mind that this is just a rough prototype that I threw together in about an hour to see if my idea would work. I will be fabricating and welding together something better as I have the time (between about 100 other unfinished projects). The entire mount can be installed/removed with 2 bolts in about 3 minutes.
This picture shows the C-channel and aluminum plate mounted to the tailgate. The mount looks tilted because the Jeep is parked on an incline in my driveway, but it sits perfectly parallel with the tailgate.
In this picture, you can see how I bolted the RotopaX mount to the aluminum plate after centering the fuel can on the mount.
As you can see, the can does not obstruct the lights, license plate, or view through the rear window.