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Old 06-15-2016, 09:56 AM   #1
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Dual Tires - One valve stem?

On my new Greyhawk 29MV, the duals have only one valve stem for the pair of tires on each side..
Can I be confident that the pressure reading on that stem is accurately representing equal pressure in each of the tires?
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Old 06-15-2016, 10:02 AM   #2
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The other one is on the back side.
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Old 06-15-2016, 10:03 AM   #3
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Both tires have their own stem.
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Old 06-15-2016, 10:04 AM   #4
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Are they tied together with a braided SS hose mounted on the hub cap or lug nut? If it is rigid valve stem then you are missing the other one and might have them offset behind a rim out of view. When dual tires are mounted they should be adjusted so that a clear path is made from the outside rim to the inner valve stem.

Now if the 2 are tied with an extender hose then hopefully both are 100% pass through. If so the pressure will equalize in both tires the same.

Bad thing with that is if one goes flat they both go flat. I would opt for independent like I have on my TV.
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Old 06-15-2016, 11:24 AM   #5
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If both tires are tied together (doubtful) the real downside is that if a leak develops in one tire both go flat. If there is a slow leak you risk overheating and possible blowout if not recognized. A TPMS system would be critical to let you know the air staus. I believe TPMS is important at all times, you can get a low or flat dual and sometimes not even see it just by looking.
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Old 06-15-2016, 11:47 AM   #6
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If both tires are tied together (doubtful) the real downside is that if a leak develops in one tire both go flat. If there is a slow leak you risk overheating and possible blowout if not recognized. A TPMS system would be critical to let you know the air staus. I believe TPMS is important at all times, you can get a low or flat dual and sometimes not even see it just by looking.
Especially on a dually!
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Old 06-15-2016, 12:03 PM   #7
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Originally Posted by Dreamgolfer View Post
On my new Greyhawk 29MV, the duals have only one valve stem for the pair of tires on each side..
Can I be confident that the pressure reading on that stem is accurately representing equal pressure in each of the tires?
take the guessing and worry of dual tires out of your life. I use this on my F450, no need to check pressure and don't have to worry about one going flat due being tied together. I now have just to glance at the cats eye. This is used in California on all the port trucks for the past 9 years without a failure.

Cat's Eye® - Link
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Old 06-16-2016, 03:19 PM   #8
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Thanks to all of you. Shortly after the question, I realized how naieve I was.
Lots of good input from all of you. Much appreciated.
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