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Old 07-28-2021, 01:39 PM   #1
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Inside dually tire runs higher pressure

My inside dualies run higher pressure than the outside tire or the steering tires. They all start at the same cold starting pressure. They will get to about 5 lbs higher. Is this normal?
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Old 07-28-2021, 02:05 PM   #2
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Yes...more heat under there, less air flow, differential heat, steel insie wheel versus aluminum...all contribute to higher temperatures.
Totally normal.
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Old 07-28-2021, 09:47 PM   #3
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Yes normal. Ours do the same.
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Old 08-13-2021, 03:27 PM   #4
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Cold tire pressure

Thank you. Is it also normal for the cold tire pressure to fluctuate around 5 lbs from day to day depending upon the outside air temperature?
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Old 08-13-2021, 03:50 PM   #5
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Thank you. Is it also normal for the cold tire pressure to fluctuate around 5 lbs from day to day depending upon the outside air temperature?
Yes and the side exposed to the sun will show a higher pressure.
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Old 08-13-2021, 06:13 PM   #6
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The brakes are overlapped by the inner dual wheel, thus higher temperature recorded.
I removed any concern over tire pressure fluctuation, I simply run what the Federal Tire Placard states.
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Old 08-13-2021, 08:13 PM   #7
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Crossfire valve system

You can eliminate this problem by installing a crossfire valve system. It will keep the tire pressure equalized no matter what tire temperature or road conditions. I run them on my class C and I love them. Plus only one place to fill both tires.

https://www.raneystruckparts.com/cro...hoCw0IQAvD_BwE
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Old 08-14-2021, 10:45 AM   #8
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Inside duallies scrub more, wear faster too. And all the other things mentioned above.
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Old 08-15-2021, 08:15 AM   #9
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You can eliminate this problem by installing a crossfire valve system. It will keep the tire pressure equalized no matter what tire temperature or road conditions. I run them on my class C and I love them. Plus only one place to fill both tires.
Just a curiosity. If you have a blowout or major air loss on a dual tire application covered by crossfire, both tires will go flat. Thatís a bad thing!
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Old 08-15-2021, 08:26 AM   #10
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Just a curiosity. If you have a blowout or major air loss on a dual tire application covered by crossfire, both tires will go flat. Thatís a bad thing!
I was thinking that too, but on his link they claim that it has a safety feature that will isolate the good tire if there is a blowout, or even if there's a slow leak. That's an interesting idea, but I'm not that worried about the inner tite pressure being a little higher.
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Old 08-15-2021, 08:35 AM   #11
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You can eliminate this problem by installing a crossfire valve system. It will keep the tire pressure equalized no matter what tire temperature or road conditions. I run them on my class C and I love them. Plus only one place to fill both tires.
The main problem with a Crossfire System is you can't install individual TPMS sensors on each tire which is an absolute must for me. All tires should have TPMS sensors in my world.

Inside dually running 3-5lbs more PSI is totally normal.
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Old 08-15-2021, 12:48 PM   #12
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Quote:
Originally Posted by nvs4602 View Post
You can eliminate this problem by installing a crossfire valve system. It will keep the tire pressure equalized no matter what tire temperature or road conditions. I run them on my class C and I love them. Plus only one place to fill both tires.



https://www.raneystruckparts.com/cro...hoCw0IQAvD_BwE
I have crossfire on my 1999 F53. Great product. Mine are 80lb at center line. Easy to fill and check all rear tires in minutes.Click image for larger version

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