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Old 01-16-2018, 08:41 PM   #1
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Cold Weather Tire pressure?

Finally a weekend predicted to be warm enough for another weekend trip. Trailer has been sitting for a little over a month with some pretty cold weather here in the south. I was wondering if the tire pressure on the TT needs to be adjusted during the cold months of the winter?
Thanks
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Old 01-16-2018, 08:45 PM   #2
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Your 2018 tires are filled with Nitrogen. There shouldn’t be any reason to add air to them. You are good to go.
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Old 01-16-2018, 08:46 PM   #3
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Quote:
Originally Posted by stevenl View Post
Your 2018 tires are filled with Nitrogen. There shouldn’t be any reason to add air to them. You are good to go.
Thank you sir!
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Old 01-16-2018, 09:05 PM   #4
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You still need to keep the pressure in the tires at the maximum pressure rating. All gases respond the same way to colder temperatures according to Boyle's Law. As they get colder the pressure drops. Even if they used 100% nitrogen at the factory, air is 78.09% nitrogen anyway so there is very little difference. Once you get to a warmer climate you can check the pressure after they have cooled over night and readjust as required to stay at the max load pressure. Never adjust pressure when a tire has been rolled down the highway for any period of time unless the pressure is lower than needed.

All gasses expand when heated and contract when cooled, and tire inflation pressures are no different. Tire inflation pressure can rise and fall with changes in ambient temperature by about one psi (pound per square inch) for every 10 degrees Fahrenheit. So if you went from 70 degree weather to 20 degrees, your tires would show about 5 pounds less pressure.
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Old 01-17-2018, 05:43 AM   #5
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^^^^ x2
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Old 01-17-2018, 06:06 AM   #6
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I agree with us71na. Always adjust your pressure when your tires are cold. The pressure will rise some with temperatures. Always check your pressure before each trip to make sure it is correct.
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Old 01-17-2018, 06:12 AM   #7
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I never bought in to the Nitrogen craze. Now if I was driving a race car , yes.

I keep mine filled to mfg sticker pressure, when cold on the rv and use the mfg. recommendation for the truck. On my rig, I have increased the lr of the tire and computed what pressure I need for my load. I run 100psi on the G614's.

Good old air is what I have available.
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Old 01-17-2018, 07:53 AM   #8
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I too run max tire pressure on my TT, no matter the outside tire pressure. I check them every time we are getting ready to leave.
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Old 01-17-2018, 07:38 PM   #9
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I check my tire pressure prior to leaving any location. I found that when sitting for an extended period, one side of the trailer consistently loses 2 lbs in both tires. I purchased at digital pressure tester and use it every time. I also check my lug nut torque prior to any long trip or at 1000 miles. Since the TT is just a year old I expect some "adjustments." I found 2 lugs at different times that had lost over 5 lbs of torque.
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Old 01-17-2018, 09:10 PM   #10
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The biggest benefit to using nitrogen is that it is totally dry. Depending on your air compressor equipment, you can get a decent amount of water with the air.

Nitrogen also prevents corrosion, since steel and aluminum oxidize only in the presence of oxygen. But I've never had issues with the interior of my wheels corroding anyway, so not sure if this matters to the average user.

There's all sort of nonsense about how air leaks through the rubber and nitrogen doesn't, but remember air is already 78% nitrogen. The amount that leaks out is very close to the same for both.

Yes, check your tire pressure any time your vehicle has been stored for a long time or if the temperature has dropped. Add air or nitrogen, whichever makes you happy. I use plain old air.
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