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Old 02-28-2016, 06:53 PM   #1
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valve stems extender for tire pressure

Can anyone recommend a valve stem extender for my AS. impossible to check the tire pressure on rear tires.
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Old 02-28-2016, 07:33 PM   #2
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http://yourtireshopsupply.com/produc...-chrome-dl1spc
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Old 02-28-2016, 07:43 PM   #3
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Here's the one I got: http://www.yourtireshopsupply.com/pr...yvalve-dl1spal

Not sure what the difference is except the curvature on the outer dual stem.

Full disclosure: Never got around to installing them. Decided to let the next owner install if he wants to.


To check the rear pressure, you'll need a dual head gauge like this:
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Old 02-28-2016, 07:55 PM   #4
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That is correct for the Alcoa wheels. I cut and pasted too quickly. There is no need for a special air chuck. I have the exact same you posted on mine.
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Old 02-28-2016, 08:13 PM   #5
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GMiller and Shark are right on. The Dually Valves are the way to go.
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Old 02-29-2016, 09:01 AM   #6
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Last year on my Interstate, I fought the air hose, the gauge, tires and everything else it seemed like when I tried to check the air or put air in the rear duallies. This year I got smart and had the DuallyValve DL1SPAL installed. They work great.
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Old 02-29-2016, 09:07 AM   #7
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+1 on the Dually valves mentioned above. I have them also, with a TST TPMS that works great.


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Old 02-29-2016, 09:23 AM   #8
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+1 on the Dually valves mentioned above. I have them also, with a TST TPMS that works great.


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Ditto on the TST TPMS. Very easy system to install and use. User replaceable batteries are a big plus with this system.
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Old 02-29-2016, 10:02 AM   #9
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https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

I just installed these and like em.
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Old 02-29-2016, 10:51 AM   #10
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Quote:
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https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

I just installed these and like em.
I had problems with flexible extensions on my Interstate. Couldn't make the extensions for the inside duals stop leaking, possibly because the inside duals have rubber stems and the flexible extensions were too heavy for them.

I went with rigid aluminum extensions, straight for the inside duals, "J" shaped for the outside duals, and they don't leak.
http://www.amazon.com/Wheel-Masters-...tem+extensions
http://www.amazon.com/Wheel-Masters-...tem+extensions

I did use a 3' flexible extension on my spare, with the outer end attached to the rear bumper, so I could check and reinflate my spare without crawling underneath, and it works without leaking.
http://www.amazon.com/Wheel-Masters-.../dp/B002IUCFIA
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Old 02-29-2016, 01:13 PM   #11
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FWIW, Wheel Masters states they are nickel plated brass. Thought they were pretty shiny for aluminum altho I realize polished aluminum can be shiny, just doesn't stay that way long. See Alcoa wheels on our AIs prior to Durabright.
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Old 02-29-2016, 03:33 PM   #12
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FWIW, Wheel Masters states they are nickel plated brass.
What can I say? Senior moment. Thanks for the correction. In any event, they work for me.
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Old 02-29-2016, 04:08 PM   #13
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The plastic extenders that came on the inner dual were worthless - wasn't able to add air through them. I feared too much spinning mass if I used metal extenders on the rubber stem. So I unscrew the cap on the rubber stem and screw on the metal extender each time I want to check/add air. Not real handy, but didn't want to pay for metal stems until I had the wheels off for other reason (such as new tires).
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Old 02-29-2016, 04:10 PM   #14
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I had problems with flexible extensions on my Interstate. Couldn't make the extensions for the inside duals stop leaking, possibly because the inside duals have rubber stems and the flexible extensions were too heavy for them. ....
...

Those rubber valve stems on the inner dual wheels are a real problem if you attach anything besides the lightweight plastic extensions installed by Mercedes. I attached a set of flow thru caps on mine and I'm sure they caused the flat I had.


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