dually tires

rtz549 wrote:
Just get a dual head air chuck:

but you if you have smaller hand holes, you may need a different reverse angle, like 180 degrees, cause that 30º reverse angle will not line up through the hand hole properly to fit on the tire air valve.

You will notice that one has a 180º reverse chuck, while the other has only a 30º reverse angle chuck.

Same with the gauges:

Alcoa sells these gauges and air chucks in both 30º reverse angle and 180º reverse angle.