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Old 11-06-2015, 05:10 PM   #1
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Valve stems for inside duals

Because of a defective (leaking) valve stem extender, I recently had to replace an inside dual-to the tune of $1150.00. I think a long valve stem would be a much better option than the extender as it would eliminate one area where failure could occur. So far, I've not had any luck finding such an animal. Help!
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Old 11-06-2015, 05:25 PM   #2
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Are you talking of a solid tubing type valve extender? They make them but the tire has to be dismounted to install.
How did you figure out the flexible extender was the cause of the leak, and if so where did it leak?
I'm assuming you have a TPMS on your beast.
http://yourtireshopsupply.com/produc...llyvalve-dl1ec
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Old 11-06-2015, 05:42 PM   #3
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I have installed Crossfires on my rear tires. They are used extensively on commercial vehicles. While they still use a braided extension, they connect to a single point to add air to your tires. They also have a visual display of the tire pressure - you must buy them for the pressure you desire - mine are 110 lbs. They equalize the pressure between the two tires for improved tire wear and the single point \ visual display, makes topping up much easier. They are about $60-$75 per side but well worth it. They are made by DualDynamics. and would likely have averted your problems. Check them out and Good luck,
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Old 11-06-2015, 06:19 PM   #4
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finially went to a real big tire place after two inner tire flats. He guarenteed these,


Something called Air-flex, made in Germany no more flats
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Old 11-06-2015, 06:30 PM   #5
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I have installed Crossfires on my rear tires. They are used extensively on commercial vehicles. While they still use a braided extension, they connect to a single point to add air to your tires. They also have a visual display of the tire pressure - you must buy them for the pressure you desire - mine are 110 lbs. They equalize the pressure between the two tires for improved tire wear and the single point \ visual display, makes topping up much easier. They are about $60-$75 per side but well worth it. They are made by DualDynamics. and would likely have averted your problems. Check them out and Good luck,
On your Crossfires if you loose air in one duel does the brother duel maintain pressure?

EDIT: http://dualdynamics.com/products/cross-fire/

Looks like a good system. I wonder why getting a $ price is like getting a root canal.
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Old 11-06-2015, 06:34 PM   #6
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On your Crossfires if you loose air in one duel does the brother duel maintain pressure?
Yes, suggest you google them to see the safety features. Check Amazon or other on line outlets. I saw them for $53 each on Amazon. You need to get one for the correct tire pressure - likely when at the full load you will be carrying.
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Old 11-06-2015, 07:12 PM   #7
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I don't know why Entegra would use an extension. You can pretty much go to any tire store and get long metal truck stems. Years ago, when I was installing new rear tires, my Monaco had the flexible extensions that bolted to the center cap. I asked the dealer to change to a metal stem, they opened a cabinet and had a large box of them. They charged me $11.00 each for the stem.

I know Dually Valve sells them, but they get a fortune for them.
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Old 11-06-2015, 07:33 PM   #8
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x2 on the benefits of Crossfires. Besides extending tire life by keeping inner and outer dual tire pressures equal, they provide easy direct access to check tires and add or remove air if need be, which I found very difficult and time consuming on the duals without the Crossfires.

Crossfires have an isolation valve that operates at 10 PSI below the Crossfire normal tire pressure value. That is why you have to buy the right Crossfire that matches your dual's normal tire pressure value.
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Old 11-06-2015, 09:22 PM   #9
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I purchased the valve stems from Dually Valves and I am very happy with them. They are a one piece stem that is really well made. They also come with a rubber piece that goes into a hole in the outside rim so the valve stem does not vibrate as you drive. My old valve stems were wearing a spot off in the outer rims.
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Old 11-06-2015, 11:31 PM   #10
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After messing around with leaking extensions for a while I installed Borg extended valve stems from Dually valve kits for Motor-homes, Busses and 6-wheeled chassis

Well worth the price.
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Old 11-07-2015, 05:55 AM   #11
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After messing around with leaking extensions for a while I installed Borg extended valve stems from Dually valve kits for Motor-homes, Busses and 6-wheeled chassis

Well worth the price.

To install, the wheels are removed and tires (four) dismounted to remove original stems and install Dually kit. Tires are index to keep balance point. Duels are then are restacked. And air pressure does not equalized in the tires. Is that right ? Might be something I would do when buying new tires.
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Old 11-07-2015, 07:58 AM   #12
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The other thing you can do when changing valves is have them mounted so that both face outward, making both easy to access and mount TPMS sensors. The only reason to have them facing opposite directions is so that the tire can be rotated to another position without reversing the valve again. Since there is seldom any need to rotate tires on a motorhome, it makes life easier to have all the dually valves stems facing outward. That plus a long stem on the inner makes air check/adjust simple.

They make solid extension too, so you don't have to use the rubber ones if you want to reduce the risk of an extension failure. Truck tire shops usually have them, but NAPA & Carquest stores will have them too, or can get overnight.
https://www.schraderinternational.co..._lang=en-US-SA
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