Posted by John on June 09, 2018

The site indicates that for every +10 degrees F, adjust the pressure up by an average of one pound psi. At which temperature do we begin to change the pressure? Is there a standard temp we begin at and then for every +10 degrees F, we add one psi?

Answers / Replies
  • Posted by Jadatis on June 09, 2018

    Pressure advice is calculated for 18degrC/65degrF. And the advice is cold pressure, so when temp in and outside the tire is the same. If you note outside temp, and calculate back the measured pressure to 18/65 degr. Then you do it right. Better would be to talk about a sertain % pressurechange for 10 degr C/F. Then its the same % for every pressure from 20 to 120 psi.

  • Posted by Serge on June 09, 2018

    If your current tire pressure at current temperature is set at recommended level, that means you calculate temperature change from current temperature. For example if you set your tire pressure to recommended level of 32 psi when it is 50 degrees F, then if temperature drops to 40, your tire pressure will drop by about 1 psi. If you add that 1 psi now, it will be back to 32 psi. So there is no set temperature that is used as default point. 68 F / 20 C is used as an example start point taking into account that you have set your recommended tire pressure when temperature is 68 F / 20 C.

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