Tire Pressure

[shourekl]

Was told 90 psi in cold weather is same as 100 in warm? Any thoughts would help Thanks

 

[rode2rouen]

100psi is 100psi.
If it's cold outside, 100psi is 100psi.
If it's warm outside, 100psi is 100psi.

If the person meant that a tire with 90psi cold will read 100psi when warm, they are mistaken.


Rex

 

[LDB]

There is probably more like a 3 to 5 psi difference between cold and hot inflation pressures. It isn't the weather temp though it's the tire temp.

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[Wilca2001]

100psi is 100psi.
If it's cold outside, 100psi is 100psi.
If it's warm outside, 100psi is 100psi.

If the person meant that a tire with 90psi cold will read 100psi when warm, they are mistaken.


Rex

Rex, I guess you have never checked your tires after driving for a while. Why you think the manufacturer recomends checking the PSI when the tires are cold.

 

[Turtle]

Was told 90 psi in cold weather is same as 100 in warm? Any thoughts would help Thanks

It is one PSI difference for every 10° F. So, if by "cold weather" you mean 20° F, and by "warm weather" you mean 120° F, then yes, your numbers are correct.

 

[scottm4211]

It is one PSI difference for every 10° F. So, if by "cold weather" you mean 20° F, and by "warm weather" you mean 120° F, then yes, your numbers are correct.

So you're running about 100 psi right now?

 

[Turtle]

Well, no, my cold tire pressure is 55-front and 80-rear.