Cold Tire Pressure

[travelinman-KEY]

We are getting read to leave on a trip. The weather has been hovering around 100 at our home and I have been watching my tire pressure on my TPMS. My cold temperature is 110-111 psi. During the daytime the tire pressure has raised to approximately 121 degrees with the ambient temperature. My question is would it be safe to lower the cold temp to 100 psi knowing that the combination of the ambient temperature along with the tires natural heating up will exceed the 110 psi rating on the tires? My fear is having the pressure runaway while driving.

 

[mhs4771]

Kind of depends on what you mean by your cold temp. Pressure should be set at approx 70 degrees give or take a little, as they heat up the pressure will rise which it normal and accounted for. My 125 PSI tire will get near 150 PSI on hot pavement traveling.

 

[bobbecky]

All you will be doing by lowering the cold pressure setting is increasing how hot the tires will get due to extra flexing, and you will lose weight capacity in those tires. Also, tires that are run under inflated will deteriorate just like running with a partial flat tire. Get out in the morning, maybe before the sun is shining on the tires and inflate them to the cold inflation number and don’t let any air out, and you will be good to go. Hopefully you are using a TPMS system on your rig.

 

[FastEagle]

The DOT describes cold tire inflation pressures to be valid after the vehicle has remined motionless for three hours.

 

[1retired06]

Bottom line, run at 110 cold.

 

[mhs4771]

Problem with "Cold" you need some sort of starting point, If you set the pressure at 32* and then head into someplace like Death Valley where the temp might be 120* the pressure may increase way beyond norm.
I think I read on the Good Year or maybe another major brand that cold is considered to be a nominal 70* point at which to set your tire pressure.

 

[PSFORD99]

Problem with "Cold" you need some sort of starting point, If you set the pressure at 32* and then head into someplace like Death Valley where the temp might be 120* the pressure may increase way beyond norm.
I think I read on the Good Year or maybe another major brand that cold is considered to be a nominal 70* point at which to set your tire pressure.

That would be tough for many, I set my Sailuns cold at 100 psi regardless of the outside temperature , no way to second guess what happens when I hit 70 plus degree weather in my travels . So far I have been okay leaving Utah in the winter ,and headed for Arizona . I leave Utah at 30-40 degrees ,and end up at 70 plus down south . The 100 psi is well within the weight rating for my fifth wheel .

 

[foldbak]

I did some reading and the basic rule is check your pressure just prior to leaving. Tires lose or gain 1 PSI for every 10℉ change in temperature.SO important to have a TPMS.



The typical tire should run about 158 degrees once you get going down the road, but this can vary greatly depending on the weight of the trailer, how fast you're traveling, and also driving habits. So while 158 is probably "normal", it isn't really a standard to try to stay at.


Most experts consider 195 degrees Fahrenheit as the “line in the sand” when it comes to tire temperature: Beyond that point, the temperature will start impacting tire life. At 250 degrees, a tire will start to lose structural strength, could begin experiencing tread reversion and the tire will begin to lose strength.


So I guess if it's 32 out you would set your tire pressure at 110. I wouldn't think that you'd be traveling far enough in one day to hit 100 temperatures. But if you did that would only be a 7 pound increase at which time you could pull over and let some pressure out.



Thank you google!

 

[rames14]

We live at 7500 feet. We leave ours set at 110. If they go to 105, I don’t obsess over it. In Manufactuing we used to call the people that chased the exact number all the time Zero Seekers. They never got anything done. Check it where you are at in the morning. If it’s within 5 lbs or so, don’t worry about it. We could be at 48 degrees in the morning and go down where it’s a hundred. Don’t go crazy, but more pressure is better than low pressure. I haven’t touched my tires this year. We’ve been from below zero at Grand Canyon to 104 at Moab.

 

[FastEagle]

To talk technical, you have to study the topic. Here's a starter for tires.

An important concept related to temperature is thermal equilibrium. Two objects are in thermal equilibrium if they are in close contact that allows either to gain energy from the other, but nevertheless, no net energy is transferred between them.

 

[foldbak]

To talk technical, you have to study the topic. Here's a starter for tires.

An important concept related to temperature is thermal equilibrium. Two objects are in thermal equilibrium if they are in close contact that allows either to gain energy from the other, but nevertheless, no net energy is transferred between them.

Whoa! That requires way too much brain power

 

[BuckandTeresa]

My Goodyear Endurance cold pressure says 110 psi. I just finished a long trip in Wyoming with 95 degree temps. My TPMS showed them slowly increase to approx 121 psi driving 65 moh. One tire was about 108 at start, and I noticed it heated up more (just by the greater increase in osi) than the one behind it. I balanced the air pressures at the next stop and noticed they all increased exactly the same psi after driving a while. Like someone said on a previous thread, the high number is not as important as the differential increase between tires, which can indicate a bad bearing or dragging brake.

 

[bcrvman]

We are getting read to leave on a trip. The weather has been hovering around 100 at our home and I have been watching my tire pressure on my TPMS. My cold temperature is 110-111 psi. During the daytime the tire pressure has raised to approximately 121 degrees with the ambient temperature. My question is would it be safe to lower the cold temp to 100 psi knowing that the combination of the ambient temperature along with the tires natural heating up will exceed the 110 psi rating on the tires? My fear is having the pressure runaway while driving.

The tire manufacturers allow a lot of leeway, just put 110psi in during the coolest part of the day and the rest will take care of itself.

 

[DanC-MOC]

We are getting read to leave on a trip. The weather has been hovering around 100 at our home and I have been watching my tire pressure on my TPMS. My cold temperature is 110-111 psi. During the daytime the tire pressure has raised to approximately 121 degrees with the ambient temperature. My question is would it be safe to lower the cold temp to 100 psi knowing that the combination of the ambient temperature along with the tires natural heating up will exceed the 110 psi rating on the tires? My fear is having the pressure runaway while driving.

the tire dealer set my tire pressure to 95 lbs and set my TPMS to the cold pressure (110 psi) that is indicated on the tire. My temps climb to about 116 while traveling but doesn't set off my pressure alarms that are factory set at 20% above that I have inputted

 

[aswanson]

Tire pump

Any advice on a tire compressor that will deliver 120 psi to the nozzle? Nothing I have bought can actually achieve tire pressure of 110 psi.

 

[bcrvman]

Any advice on a tire compressor that will deliver 120 psi to the nozzle? Nothing I have bought can actually achieve tire pressure of 110 psi.

I have a VIA Air (sp) and it is good to 150. Different models different pressures. It is compact and fast. Most full time RVers use it.
Here is amazon canada link to the 150psi model, they are NOT cheap
https://amz.run/666I