dually tires

Air compressor with air chuck attached.

I had metal valve stems installed so both the outside tire and inside tire valve stems are pointed out. Same as filling one tire but do it twice. So much easier than trying to fill the inside tire with one of the dual chucks. Tire-Man Valve Stems

On ours the valve stem for the dual is accessible through the hole in the wheel of the outer wheel. The big "however" is ...I do it because my hands are smaller. If "he" had to try to do so it would be almost impossible. If you have the type of valve stem caps that don't have to be removed that can also be a plus. The next option is to mount valve stem extenders to the outer wheel.

Just get a dual head air chuck:

I use a dual head chuck, but not that one. I have to use one that is a different angle than that. Pretty much a piece o'cake.

You are talking duallies on the truck aren't you?

This brings up an interesting point. My dually came from the factory with both valve stems lined up next to each other. The other day I came across something that said the valve stems should be mounted 180* apart. Hadn't heard that one before.

To answer the OP's question; I also use a dual chuck and keep the tires at the recommended pressure - 70 front, 65 rear. Haven't found the need to change the pressures.

Plumbing test ball extension hose. I only loose 2psi when i remove it.

First time I checked the tires it was a major pain to remove the inner stem caps. Second time around I realized I didn't have to. Since then it has been pretty easy with the right chuck.

I had steel valves intalled for 40 bucks at a truck shop. No more struggling to air up inner tires.

I would like to thank the guys that took my question serious,

turbo, was that 40$ a tire? as for the others thanks again