What do you use to air up inner wheel of dually?

[rollondown]

Look for a product called Crossfire. Good enough for truckers, ambulance companies etc...

Crossfire - Dual Dynamics

[vsheetz]

Originally Posted by AFChap

Option 1: Alligator caps on all valve stems. (Alligator is the brand name ... there are imitations that may not be of equal quality). They are high pressure, dual seal caps that you do not have to remove to check or add air. Then you need a pressure gauge with a straight foot rather than the normal angled foot, and the same type straight foot air chuck for use with your compressor.

Option 2: Have long valve stems installed, OR, install solid metal extensions long enough to reach through the hole. Again, unless you have a TPMS installed, the Alligator caps will make life much easier.

On my aluminum wheels, after having a cracked valve stem, I also bought rubber stabilizers that fit in the hole in the wheel to keep the long stems from flexing while driving.

After getting fed up with leaks from option 2 on multiple RVs, I removed the extensions and now use option 1. Much better...