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Old 03-15-2020, 03:23 PM   #21
McRod
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My tire PSI's go up in that range. It's normal.

WARNING: I am not an ingineer. Just stayed in a RV last night.
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Old 03-15-2020, 06:31 PM   #22
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Originally Posted by Carl n Susan View Post
I find that using a 78% Nitrogen mixture works very well.
That is what I use and itís better than cheap, itís free.
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Old 03-16-2020, 02:20 PM   #23
Dixie Flyer
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Weeks ago I had a tire blowout. I replaced all the OEM F rated tires with G rated Carlisle. Subsequently I installed a TPMS. The cold pressure in each tire is 110 psi as recommended for the load. When driving in 65 F weather at 65 mph I saw the pressure get as high as 135 psi.

A lot of forums say things like "I believe ..." and so on. I'm interested in finding out if anyone knows for a fact, such as a data sheet from a manufacturer, at what pressure I should become concerned. FWIW the maximum temperature reported by the TPMS is 90 F.

Years ago I had a tire on the front of my car that that caused the car to pull to the right. I replaced the tire with a new one and that stopped the pulling, The tire also had a tendency to run hotter tham the other tires. The cause of the problem was the cord was misaligned or overlapped when the tire was made. The dealer had the tire x-rayed and that is what he told me. you could see the tire was raised on one side making it out of balance also. Anytime it takes more than 8 ounces of weight to balance a tire something is wrong. You can balance a concrete block if you put enough weight on the other side.. So take the tire that is running hot and balance it. See if it is out of round. If it is replace it with another tire and see if that helps your problem.
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Old 03-16-2020, 02:48 PM   #24
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Thanks for the explanation! As a computer geek, I was unaware! 😩
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Old 03-16-2020, 06:20 PM   #25
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Quote:
Originally Posted by Minitrbo View Post
Weeks ago I had a tire blowout. I replaced all the OEM F rated tires with G rated Carlisle. Subsequently I installed a TPMS. The cold pressure in each tire is 110 psi as recommended for the load. When driving in 65 F weather at 65 mph I saw the pressure get as high as 135 psi.

A lot of forums say things like "I believe ..." and so on. I'm interested in finding out if anyone knows for a fact, such as a data sheet from a manufacturer, at what pressure I should become concerned. FWIW the maximum temperature reported by the TPMS is 90 F.
I've never seen my pressure at 135psi but the tire temperature has been up to 110F. I generally fill to 105 cold and if I saw 135psi, I would be more concerned about my 110psi limited cast aluminum stock rims.
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Old 03-16-2020, 10:03 PM   #26
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I have had my pressure get close to 135. Would not worry unless it was a single tire.
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Old 03-17-2020, 08:44 AM   #27
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I have never worried about the tire pressure on a hot tire. I still don't care. I am sure that these tires have been subject to higher temperatures than we would find on the road. After cold PSI is 110 and no one seems to wo0rry about that. OI have towed many miles and at no time have my tires been to hot to touch. I have never checked tire pressures on a hot tire. Only cold tire pressure matters. People have more to worry about than air pressures in a hot tire.

If I worried as much as most folks about stuff like this I would stop RVing. To much stress.
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Old 03-18-2020, 10:18 AM   #28
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Originally Posted by Carl n Susan View Post
I find that using a 78% Nitrogen mixture works very well.
Along with this the Nitrogen is preferred because the molecules are larger than oxygen molecules and produce less leakage. So if the oxygen leaks through the rubber tire and you refill with 78% nitrogen eventually you will raise the nitrogen content in the tire well above that 78% level at no cost. Only O leaking out and 3:1 mixture of Ni to O going back in.
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Old 03-18-2020, 10:23 AM   #29
McRod
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Along with this the Nitrogen is preferred because the molecules are larger than oxygen molecules and produce less leakage. So if the oxygen leaks through the rubber tire and you refill with 78% nitrogen eventually you will raise the nitrogen content in the tire well above that 78% level at no cost. Only O leaking out and 3:1 mixture of Ni to O going back in.
/shakeshead.
/facepalm.
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Old 03-20-2020, 08:38 AM   #30
Dixie Flyer
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/shakeshead.
/facepalm.
Lack of grease in the wheel bearings can also cause high temperatures in a tire. So be sure you have enough grease in the bearings. Repacking the bearing will satisfy that question.
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Old 06-29-2020, 10:57 AM   #31
Dan Giacalone
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After reading all these we are "shaking" down our new to us 2012 Montana 3582rl next week. I will b pulling it with my 2003 Ford F350 dually.
What truck and trailer tire pressures should use. I have heard many suggestions. Only going about 40 minutes away but will be on the highway. I have a tst system I need to set up.
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Old 06-29-2020, 11:08 AM   #32
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Originally Posted by Dan Giacalone View Post
After reading all these we are "shaking" down our new to us 2012 Montana 3582rl next week. I will b pulling it with my 2003 Ford F350 dually.
What truck and trailer tire pressures should use. I have heard many suggestions. Only going about 40 minutes away but will be on the highway. I have a tst system I need to set up.
I would start with the pressure on the trailer and truck placards.
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Old 06-29-2020, 01:33 PM   #33
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Originally Posted by Dan Giacalone View Post
After reading all these we are "shaking" down our new to us 2012 Montana 3582rl next week. I will b pulling it with my 2003 Ford F350 dually.
What truck and trailer tire pressures should use. I have heard many suggestions. Only going about 40 minutes away but will be on the highway. I have a tst system I need to set up.
You need to know at least the rear axle weight with the FW hooked up, and set your rear axle tire pressure according the tire mfgrs. table.
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Old 06-29-2020, 01:35 PM   #34
phillyg
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Quote:
Originally Posted by Dan Giacalone View Post
After reading all these we are "shaking" down our new to us 2012 Montana 3582rl next week. I will b pulling it with my 2003 Ford F350 dually.
What truck and trailer tire pressures should use. I have heard many suggestions. Only going about 40 minutes away but will be on the highway. I have a tst system I need to set up.
You need to know at least the rear axle weight with the FW hooked up, and set your rear axle tire pressure according the tire mfgrs. table. If you can't get weighed, at least set the tire pressure at max psi for duallies, embossed on the tires.
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Old 06-29-2020, 03:04 PM   #35
mlh
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I would set the pressure at max for both truck and camper. I see no reason not to. Tires will run cooler and carry more weight at max pressure.
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