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Old 06-08-2009, 04:28 PM   #1
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Join Date: Mar 2006
Location: San Carlos, CA 94070
Posts: 1,450
tire pressure vs temperature

Hi,

this is purely for my education and maybe someone here knows the answer.
So I bought an aftermarket Tire Pressure Monitoring System from tirerack: http://www.tirerack.com/accessories/detail.jsp?ID=55

The thing works great and already saved me once by alerting me to a slow flat caught by catching yet another loose nail on the street

Well, this thing not only measures pressure but also temperature.
When driving on the street I have the pressures according to spec:
29 front 36 rear

Now I notice that when I drive the pressure goes up by around 4 ~ 5 PSI equally on all 4 tires but the TEMPERATURE (when the tires are warm) is usually 10 F higher in the fronts than in the rears.

No I am not worried about it but would like to understand it:
If I want to inflate my tires PERFECT should they have the same temperature front and back or not?

Opinions please
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