Hello,I am looking for a 90g. aux transfer fuel tank that sits below bed rails on Ram 3500.RDS has a couple but their gas cap sits an inch or so too high making a tonneau cover not possible. It seems like the options I found are either tall rectangular (cannot use cover) or deep rectangular (30 inches of bed gone). Anyone found something tall and thin that works with a cover? MC

It is a matter of math , ninety gallons requires a large amount of volume . I wonder if you could alter the ninety gallon tank and recess the lid ?

Stock tank is 36 gals, if you went with a 60 gal you would triple your range...Why 90 gals?

That might be the best option. It looks like adding a bit more depth and either shrinking or recessing the cap would have been enough. I am just surprised the missed it by an inch or so in most trucks. Covering this liquid gold is important these days. MCwanderingbob wrote:It is a matter of math , ninety gallons requires a large amount of volume . I wonder if you could alter the ninety gallon tank and recess the lid ?

No particular reason other than if I am going to use the bed might as well go big. I can always use 60 or 90 on a pinch. It actually looks like 60g with a tool box fit well and takes as much room as 90 without one. I just prefer the extra 30 gallons to the toolbox. MCBurbMan wrote:Stock tank is 36 gals, if you went with a 60 gal you would triple your range...Why 90 gals?

No question more is better, but to your point I think keeping it covered trumps that....I paid $5.20 last weekend. Post a link to what you decide on, I've been thinking about doing the same.

90 gal. Aux fuel tank below bed rails. Help. | Good Sam Community

speediq99
Explorer II
Mar 19, 2022
No particular reason other than if I am going to use the bed might as well go big. I can always use 60 or 90 on a pinch.

It actually looks like 60g with a tool box fit well and takes as much room as 90 without one. I just prefer the extra 30 gallons to the toolbox.

MC

BurbMan wrote:
Stock tank is 36 gals, if you went with a 60 gal you would triple your range...Why 90 gals?
speediq99
Explorer II
Mar 19, 2022
That might be the best option. It looks like adding a bit more depth and either shrinking or recessing the cap would have been enough. I am just surprised the missed it by an inch or so in most trucks. Covering this liquid gold is important these days.

MC

wanderingbob wrote:
It is a matter of math , ninety gallons requires a large amount of volume . I wonder if you could alter the ninety gallon tank and recess the lid ?
BurbMan
Explorer II
Mar 19, 2022
Stock tank is 36 gals, if you went with a 60 gal you would triple your range...Why 90 gals?
wanderingbob
Explorer II
Mar 19, 2022
It is a matter of math , ninety gallons requires a large amount of volume . I wonder if you could alter the ninety gallon tank and recess the lid ?

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90 gal. Aux fuel tank below bed rails. Help.

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