Did this a couple of weeks ago but found a combination of two unrelated objects to arrive at a perfect 1 Gallon propane tank holder for my rack. I purchased a
FlameKing tank from Amazon (glad I got it a month ago because it's out of stock currently) and was looking for a way to store it securely outside of the vehicle.
Also purchased from Amazon a Best Welds gas cylinder holder which fits perfectly.
Amazon product ASIN B01HXM7JE2
However, it needed to be mounted to something to keep the tank vertical. Was trying everything I could think of that would bolt together since I don't have access to a fab shop/welder. Then, one day a couple of weeks ago stumbled across this:
View attachment 2706865
It is a sliding door roller. However, once you take the wheel off, you can bolt the gas cylinder holder directly to it and the 4 holes in the base are perfectly spaced to attach to two crossbars in my Prinsu rack. The final result looks like this:
View attachment 2706872
View attachment 2706873
I've tested it out on the trail and it stays rock solid. Also, does not impede opening the RTT in any way. I may take it to a local muffler shop and see if they'll put a few tack welds on it so I can take the bolts off and not worry about them shaking loose on the interstate.
All in for the tank, holder, and mounting bracket = $125.