Cold tire pressure vs hot
Trying to set a tpms system. How much should a 225-75-16 tire pressure rise from 60psi cold to ?hot?, assuming outside temp of 70*. On the tpms you set for cold pressure. It will alarm at 15% . I ...
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jake2250 wrote:
You also need to factor in weight,, what are you loading that tire up with? Weight. outside ambient air, road surface temperature, speed etc! Oh and Altitude makes a bit of a difference!
Nitrogen will fix all of that and give you consistent pressures!
Are you suggesting that Nitrogen does not follow the ideal gas law? All gasses expand as their temperature increases, even nitrogen. The primary advantage of using nitrogen rather than atmospheric air is that nitrogen has less water vapor in it. (Air is, after all, mostly nitrogen.)
For tires, the pressure changes are due to changes in temperature inside the tire. Weight and speed only matter in as much as higher weight on the tire or greater speed cause it to flex more and heat up more as you travel.
