Dually valve extensions?

On the front, the wheels are installed "dished in" and the valve stems are visible and accessible from the outside.

On the rear, the wheels are installed "dished away from each other" and the valve stems are trapped between the wheels.

Access to both requires reaching in through the hand hole and fiddling with the caps, then fishing the dually chuck in there to check pressures/add air. An extension on one only solves half the problem. A straight extension only helps with the inner dual.

It does nothing to help with the outer, harder to access, valve stem.

My new truck has factory TPMS, but when I had duallies on motorhome, I put Crossfire equalizers on them and topped with screw-on TPMS.
The best of all Worlds.
No balance issue as heavy Crossfire valve sits close to the wheel center and hoses go in opposite directions.

mkirsch wrote:

TxGearhead wrote:
The extension is for the inner tire.

If the valve stem on the outer tire was on the outside, I'd buy that explanation. However, it is on the inside. Seems like it needs an extension just as bad as the inner tire.

Also doesn't explain why they're sold in packs of 4.

Sorry but I'm not understanding any of that.

My outer wheel is an alloy with approximate 1.250" diameter holes in it. The valve stem on it is metal, on the outside, and is pointed directly away, toward the inside wheel. There is no problem using a dually air chuck on it.
The inner wheel is a painted black steel wheel. It has a typical rubber valve stem with a straight 2" extension coming towards the hole in the alloy wheel. The same hole that the outer tire valve points to.
So, both valves are essentially in the same location, degree wise, on both wheels. Both sides of the dually are the same.
A rigid steel dually tire chuck cannot be angled enough through the alloy outer wheel hole to directly approach the inner wheel valve. I can get near the inner valve and push it around with the chuck and eventually get a shot good enough to add air after I have lost 5-10 pounds. I don't like that.
Amazon sells extensions as singles, pairs, 4, or a package of 100.

This is how I fixed my problem works like a charm had them on for 2 years now after too many issues the other ways, no balance problems either



Dave

TxGearhead wrote:

path1 wrote:

donn0128 wrote:
I took the extensions off and threw them away. Instead I use a basic plastic cap. I find it easiest to use a dual head tire gage and a dual head air chuck. I can reach between the tires easy enough.

Correct, just get the correct tools to get to them. And save all the other hassles.

I have the correct tools; dual head chuck and gauge.
The chuck does not engage the valve straight on. I have limited access because the holes in the wheel aren't big enough diameter to angle the chuck.

I had to get a cheap tube bender for 1 tire that point off center.

TxGearhead wrote:
The extension is for the inner tire.

If the valve stem on the outer tire was on the outside, I'd buy that explanation. However, it is on the inside. Seems like it needs an extension just as bad as the inner tire.

Also doesn't explain why they're sold in packs of 4.

mkirsch wrote:
If you install them opposite of each other, the weights will cancel out.

They're the straight ones, right? How do these help? Seems to me they would make getting to the valve stems more difficult.

The extension is for the inner tire.

path1 wrote:

donn0128 wrote:
I took the extensions off and threw them away. Instead I use a basic plastic cap. I find it easiest to use a dual head tire gage and a dual head air chuck. I can reach between the tires easy enough.

Correct, just get the correct tools to get to them. And save all the other hassles.

I have the correct tools; dual head chuck and gauge.
The chuck does not engage the valve straight on. I have limited access because the holes in the wheel aren't big enough diameter to angle the chuck.

donn0128 wrote:
I took the extensions off and threw them away. Instead I use a basic plastic cap. I find it easiest to use a dual head tire gage and a dual head air chuck. I can reach between the tires easy enough.

Correct, just get the correct tools to get to them. And save all the other hassles.

I've had Borg stainless steel extensions for years on my duals. Inside and out both. Have never had any trouble with them. After install I just had the balance checked. No change but get it checked anyway.

Dave