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-   -   Dually wheel valve stem extension thread (https://www.airforums.com/forums/f240/dually-wheel-valve-stem-extension-thread-216362.html)

mike2016 11-03-2020 10:18 PM

Dually wheel valve stem extension thread
 
This is for those with dully wheels and have aftermarket TPMS

what extension do you use with your TPMS?

I'm not going to mess with the outer wheel. The rear wheel has plastic extension from factory and definitely needs something stronger to hold the TPMS sensor.

Any thoughts on this one? seems to be the easiest to install

https://www.amazon.com/dp/B0088CNNGK...ing=UTF8&psc=1

mike2016 11-03-2020 11:54 PM

Quote:

Originally Posted by mike2016 (Post 2429287)
This is for those with dully wheels and have aftermarket TPMS

what extension do you use with your TPMS?

I'm not going to mess with the outer wheel. The rear wheel has plastic extension from factory and definitely needs something stronger to hold the TPMS sensor.

Any thoughts on this one? seems to be the easiest to install

https://www.amazon.com/dp/B0088CNNGK...ing=UTF8&psc=1

nevermind. that extension specifically says it's for Ford E350 only.


please suggest what you guys use

Rocinante 11-04-2020 04:04 AM

Dully wheel valve stem extension thread
 
For the inner rear wheels, those cheap plastic valve extensions are connected to rubber valve stems. Even without sensors, those rubber stems get a lot of flex and start leaking as the rubber gets fatigued.

Here's what we did: we added woven stainless steel valve extension hoses to the inner rear wheels, where the end of that hose is fastened to the outer wheel where it's easy to access. This seems to have resolved the flex issue, though at some point in the near future we do intend to replace the rubber stems on the inner wheels with metal ones just to make sure.

For our outer rear wheels, which already had metal valve stems, we also bought metal valve extensions with a 135 degree angle that will bring the sensor out where it's easier to access, though I haven't mounted those yet.

We got everything from Wheelmasters. For the inner rear wheels, the hand hole mount: https://wheelmasters.com/inflators.html
For the outer rear wheels, the 135 degree valve extenders: https://wheelmasters.com/extenders.html

Zach05855 11-04-2020 10:36 AM

Has anybody installed a Crossfire system on their duallies?


https://www.dualdynamics.com/products/cross-fire/

https://www.dualdynamics.com/wp-conte...e-brochure.pdf

djb75 11-04-2020 10:53 AM

When we had a Sprinter-based Class C, we tried the braided hose extensions. Twice, the wheels abraded them to the point where they let all of the air out of our tires. The rig rode well enough that we didn't know we had a flat until our next stop, so of course, the tires were ruined. Instead, I would recommend going to a tire dealer and having them install long metal stems that are made specifically for duallies - especially if you are putting a TPMS sensor on the end of it.

Rocinante 11-04-2020 01:13 PM

Interesting. We'll keep an eye out for that issue. These are stainless, not fabric, so hoping they are more reliable. In addition, they are fastened to the outer wheel so they don't move around. Nevertheless, safety first, we will definitely check on this.

Boxster1971 11-04-2020 04:06 PM

IMHO the only suitable solution is something called "Dually Valves". I got mine from the source in link below but there are other similar product available.
https://yourtireshopsupply.com/categ...sprinter-class

These metal valves support the screw cap TPMS sensors. I've had them for for over six years and 100,000 miles without an issue.

BurntAsphalt 11-04-2020 05:22 PM

+1 on Boxster’s advice. Find a good tire shop to install the duallyvalves. Be sure the service tech has the installation instructions because there is a right way and wrong way to install them

Passin Thru 11-04-2020 05:42 PM

I also agree with Boxster and BurntAsphalt. As a side comment the inside Dually can be hard to balance. I went with balancing beads inside the tire. Have worked very well.

Rocinante 11-04-2020 06:19 PM

Yeah, I saw that note about how difficult it can be to balance the inner dually when using these stems. I'll keep them in mind, but for now I'm not going to deal with that issue.

"Having Duallyvalves makes it difficult for the tire shop to balance your inner tires on a standard machine due to the long inner valve stem. Duallyvalve is compatible with internal Balancing Compounds."

Binther 11-04-2020 07:04 PM

Valve Stem Extensions
 
I found these and ordered them - the customer service was really good when I called to ask a question, and the extensions have worked fine. They support my Tireminder heads, and haven't leaked at all.


Shinyrv.com:
Valve Stem Extension 135 Degree Bend for Outside Dual on 16" to 19" Steel Wheel



Best of luck!

mike2016 11-05-2020 12:24 AM

looks like the "dully valves" is the answer. i just ordered them, as well as the "internal balancing tire beads".

good to learn something new, didnt know about the tire beads until now


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