Tire Pressure: What Constitutes "Cold Tire Pressure?" (vehicle, tires, biggest)

[GiantCow]

I understand that you should check your tire pressure in the morning before you've driven it to get the cold tire pressure which should match up with the door sticker but does living in a hot climate impact this at all?

For example, I park in a garage but it still gets to about 90F before 10AM in the morning. Is that still considered "cold" tire pressure?

[elhelmete]

I'd say yes. You're inside (no sun), and rolling friction is the biggest generator of tire heat, not air temp.

[Hollywood]

Yeah, whatever the pressure is at ambient air temp.

[Boris347]

Originally Posted by GiantCow

I understand that you should check your tire pressure in the morning before you've driven it to get the cold tire pressure which should match up with the door sticker but does living in a hot climate impact this at all?

For example, I park in a garage but it still gets to about 90F before 10AM in the morning. Is that still considered "cold" tire pressure?

Cold tire pressure is ambient temperature tire pressure, without the vehicle being driven at all, regardless of what the outside temperature is.

If you check your tires in a 90 degree garage, when not driven, the temperature is not going to raise any more than it would if you checked it in a 50 degree garage. After driving. It will balance out pretty equal.

[Vannort54]

Originally Posted by elhelmete

I'd say yes. You're inside (no sun), and rolling friction is the biggest generator of tire heat, not air temp.

Cold preasure is before you drive it first thing in the day.

[elhelmete]

Originally Posted by Vannort54

Cold preasure is before you drive it first thing in the day.

Ummm, yes, I was agreeing with the OP.

[texdav]

The book say driven less than 3 miles before being checked.

[Vannort54]

Just check them first thing in the day, let's not get to techinacial on when to check the air in your tires it's really simple don't over think this.

[cdelena]

It is still going to vary quite a bit as ambient temp changes. I have aired up tires in the morning at 50F and taken a trip where the next morning it was -5F and the warning light was on because of low pressure.

[Vannort54]

Originally Posted by cdelena

It is still going to vary quite a bit as ambient temp changes. I have aired up tires in the morning at 50F and taken a trip where the next morning it was -5F and the warning light was on because of low pressure.

In the winter time your TPMS might come on untill the tires warm up.