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Old 10-19-2015, 03:57 PM   #1
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Cold PSI for tires

This may sound dumb to some but I need to know about the tire pressure. Okay I have been watching my PSI at home. The weather in the morning is 20 degrees cooler then in the afternoon. The PSI will increase in the afternoon sometimes by 10lbs PSI. Here is my question. I plan to go to Florida in Dec. The normal temp here will be in the high 40 or 50's. My tires will reflect that in PSI. So when I leave Virginia do I inflate that cold morning to 65 PSI and just drive South? Or how do I compensate for the warmer weather that I will hit which with driving will also raise my PSI. I'm getting these reading from my TST system. Thanks for your answers and advice. What CP should I use or just leave them. They can't all have leaked the same out within 1 degree, so has to due to temperature in my mind...
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Old 10-19-2015, 03:59 PM   #2
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Inflate to 65psi and drive south.
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Old 10-19-2015, 04:16 PM   #3
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Adjust each morning to the 65psi. Some mornings you may have to inflate and some mornings you will have to deflate. That's what the monitor/sensors are for. Start each morning on 65psi and don't mess with them that day. You only drive a couple of hundred miles and the temperature will not increase that much in 200 miles.
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Old 10-19-2015, 05:06 PM   #4
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Set them to 65 cold and check it on your way out every morning. Even if the ambient temps get high enough to cause a 10PSI increase it won't hurt anything.
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Old 10-20-2015, 12:46 PM   #5
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Quote:
Originally Posted by gljurczyk View Post
This may sound dumb to some but I need to know about the tire pressure. Okay I have been watching my PSI at home. The weather in the morning is 20 degrees cooler then in the afternoon. The PSI will increase in the afternoon sometimes by 10lbs PSI. Here is my question. I plan to go to Florida in Dec. The normal temp here will be in the high 40 or 50's. My tires will reflect that in PSI. So when I leave Virginia do I inflate that cold morning to 65 PSI and just drive South? Or how do I compensate for the warmer weather that I will hit which with driving will also raise my PSI. I'm getting these reading from my TST system. Thanks for your answers and advice. What CP should I use or just leave them. They can't all have leaked the same out within 1 degree, so has to due to temperature in my mind...
Good Question! I've wondered that myself but my temperature is more extreme than yours. We'll be leaving from Michigan for Florida at the end of January and the temperature when we leave could easily be below 0. The answers you received will help me now.
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Old 10-20-2015, 12:48 PM   #6
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Fill tires cold.
Drive.
Whenever you stop long enough for the tires to cool, you can re adjust if needed.


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Old 10-20-2015, 03:39 PM   #7
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I go to Florida every year. Set cold pressure here in NJ and check every morning. Sometimes I don't have to change till Georgia!
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Old 10-20-2015, 05:33 PM   #8
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Set psi to max pressure before the tires are driven on, with no regard to ambient temps wherever you're located. Tire mfgrs. compensate for a range of daytime temps.
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Old 10-20-2015, 05:48 PM   #9
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Glen,start with your tires on the East side -10 of the west side,drive till Noon,now take a break,now fill the East side +10 and lower the west side -10 and drive South until dark,now fill Both sides the same! Are you kidding me,do you people REALLY think OTR Truck Companys have their drivers adjust Tire pressure every day? Youroo!!
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Old 10-20-2015, 06:57 PM   #10
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Put 65 while cold and only check when cold !
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