I am installing on-board air and have compressor, but unsure of what tank to use. I want to run the airbags, train horns (occasional use), and the option to air up a tire or two, in the event of an emergency(at least enough to get me some where with a shop). Is 4 gallon tank enough with compressor, or should I go 6 or 2 sixes?
Thanks

 

This is what I have hard wired into the tool box. Work fine.

http://www.awdirect.com/12-volt-dc-a.../portable-air/

 

I got my 8.5 gallon tucked up under the rear bumper, I would not go smaller.pic is up there somewhere in my gallery, I do now have a twin set of compressors tho now, not pictured.

 

I think I will try the 6 gallon for now, and just shop for other tanks in the meantime. (by shopping I mean looking for more free tanks)
I thought about up under the rear bumper, but what about spare tire?

 

my spare rides in the bed.........

 

I have a 3 gal on my truck, but i am just running airbags.