Tire pressure adjustments for outside temps.

[1Jetpilot]

Why don't someone just tell us how to use the chart if the placarded tire PSI is 38 and your garage temp is 20? I get 40 PSI

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[Runaway Tractor]

I have an amazing idea that might be simpler than referring to a chart and doing math. Ready for it?
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Put air in the tire if it's low.

 

[Firn]

Why don't someone just tell us how to use the chart if the placarded tire PSI is 38 and your garage temp is 20? I get 40 PSI

I did

 

[inchman254]

I use 1 PSI per 10F difference between garage and outside. The actual temp of your garage doesn't matter... Only the difference.

"Cold" tire pressure means in the driving environment.

 

[RickLightning]

Unless you heat or cool your garage, this is totally unnecessary. Let's say that I check my tires at 8AM. Garage is 30 degrees. Outside is 20 degrees. I do the math, and fill my tires.

Now, I go for a drive at 2PM. Temp has risen to 50 degrees! Crap, I pull back in the garage and lower my tire pressure....

I do my tires on the first Saturday of each month. In the garage, without the sun hitting them. The only adjustment I make is going a pound or two higher as winter enters, and a pound or so lower as Spring comes.

With the inaccuracy of tire gauges, the reality is that you are plus or minus 2 to 4 pounds anyway.

 

[Firn]

Unless you heat or cool your garage, this is totally unnecessary. Let's say that I check my tires at 8AM. Garage is 30 degrees. Outside is 20 degrees. I do the math, and fill my tires.

Now, I go for a drive at 2PM. Temp has risen to 50 degrees! Crap, I pull back in the garage and lower my tire pressure....

I do my tires on the first Saturday of each month. In the garage, without the sun hitting them. The only adjustment I make is going a pound or two higher as winter enters, and a pound or so lower as Spring comes.

With the inaccuracy of tire gauges, the reality is that you are plus or minus 2 to 4 pounds anyway.

You are essentially doing the same thing, just with less....science (not trying to imply your method is incorrect).

A good gauge should get you really close

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