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---MIKE---
Guest
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 Posted:
Thu Nov 17, 2005 10:53 pm Post subject:
Cold tire inflation pressure |
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My 2001 Prism specifies 30 PSI in the tires. At what temperature is
this checked. Wouldn't it be different at 0° F or at 32°F or
70°F?
---MIKE---
| Quote: | In the White Mountains of New Hampshire
(44° 15' N - Elevation 1580') |
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Al Bundy
Guest
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| Posted:
Fri Nov 18, 2005 6:34 am Post subject:
Re: Cold tire inflation pressure |
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---MIKE--- wrote:
| Quote: | My 2001 Prism specifies 30 PSI in the tires. At what temperature is
this checked. Wouldn't it be different at 0° F or at 32°F or
70°F?
---MIKE---
In the White Mountains of New Hampshire
(44° 15' N - Elevation 1580')
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Of course the pressure changes as you would expect from Charles' Law.
The 30# tire might be about 26# at 0°. Car companies expect you to
check the pressure at whatever temperature you are at and adjust it
accordingly. Most people don't check often enough. |
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James C. Reeves
Guest
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| Posted:
Fri Nov 18, 2005 6:39 am Post subject:
Re: Cold tire inflation pressure |
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"Cold pressure" refers to the typical seasonal temperature. If it's winter
and the average temp is 32F, then 32F is the "cold pressure temperature".
If it summer time, then than 80F might be the "cold pressure temperature".
One has to adjust the amount of air in the tires as the seasons change. Add
air in the winter and possibly bleeding off air as summer approaches.
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ajtessier
Guest
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| Posted:
Sun Nov 20, 2005 6:35 am Post subject:
Re: Cold tire inflation pressure |
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I believe "cold pressure" refers to the tire being cold. When a tire is
driven on it warms up, so the pressure needs to checked before the tire is
driven on more then a few miles regardless of the outside air temperature.
Al
"James C. Reeves" <jcnospam@nospam.com> wrote in message
news:7o6dnbCW76FVv-DeRVn-vA@comcast.com...
| Quote: | "Cold pressure" refers to the typical seasonal temperature. If it's
winter and the average temp is 32F, then 32F is the "cold pressure
temperature". If it summer time, then than 80F might be the "cold pressure
temperature". One has to adjust the amount of air in the tires as the
seasons change. Add air in the winter and possibly bleeding off air as
summer approaches.
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---MIKE---
Guest
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| Posted:
Sun Nov 20, 2005 11:17 pm Post subject:
Re: Cold tire inflation pressure |
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Al wrote:
| Quote: | I believe "cold pressure" refers to the
tire being cold. When a tire is driven on
it warms up, so the pressure needs to
checked before the tire is driven on
more then a few miles regardless of
the outside air temperature.
|
Thank you for your response. I think you missed the intent of the
question. What I wanted to know is at what cold temperature to set the
30 PSI. If I set it at 30 PSI today at 40°F, then if tomorrow was
10°F the pressure would read lower (perhaps 25 PSI ?). Where I live
the temperature could vary from 40° one day to -10° the next. When
should I check it?
---MIKE---
| Quote: | In the White Mountains of New Hampshire
(44° 15' N - Elevation 1580') |
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RHZ
Guest
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| Posted:
Mon Nov 21, 2005 2:13 am Post subject:
Re: Cold tire inflation pressure |
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see:
http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=1
On Sun, 20 Nov 2005 12:17:14 -0500, twinmountain@webtv.net
(---MIKE---) wrote:
| Quote: | Al wrote:
I believe "cold pressure" refers to the
tire being cold. When a tire is driven on
it warms up, so the pressure needs to
checked before the tire is driven on
more then a few miles regardless of
the outside air temperature.
Thank you for your response. I think you missed the intent of the
question. What I wanted to know is at what cold temperature to set the
30 PSI. If I set it at 30 PSI today at 40°F, then if tomorrow was
10°F the pressure would read lower (perhaps 25 PSI ?). Where I live
the temperature could vary from 40° one day to -10° the next. When
should I check it?
---MIKE---
In the White Mountains of New Hampshire
(44° 15' N - Elevation 1580') |
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