Best dualie tire valve extension?

[JeffPatton]

Great 2015 post by Sagecoachdriver, but I'd like to update the question with some more detail. I purchased a used F-350 with dualies, and I find I can't get to the inner valve stem. There are a lot of different valve stem extensions, what have people found most useful? There are angled short ones that would still require a longer fill wand than is usually found at fill stations, there are long flexible ones - some clamp on the outer wheel, but some don't and seem like they'd flop around without a clamp. And, there are some solid extensions without a clamp, where the centrifugal force would seem to cause failure over time - the extensions Sagecoachdriver mentions from Borg appear to be this type, although if they can be bent to align with a clamp, I'd think they'd be the best solution.

I'm having new tires installed (that's a big bullet to bite!) so I'd like to have the wheels balanced with the extensions in place, since they all appear to weigh even more than normal wheel weights and I have to believe their weight would make a difference in the balance. Do people find that to be true?

What are people finding today to be the best solution for dualie valve extensions?
Jeff

[NXR]

Can't answer your question however keep in mind that an extension will put a lot of stress on the valve stem itself due to the rotational velocity of the tire and the lever action of the weight of the extension. A much better solution is a solid long valve stem with some kind of grommet or support bracket fastening it to the outer wheel. People seem to really like the Borg Dually Valve.

FWIW,

Ray