Basically, pressure is proportional to temperature starting from absolute zero. Convert to Kelvin or Rankine. e.g. 72F = 532R. 125F = 585R. (585-532)/532 = ~.1 So a tires inflated to 100 psi at 72F would be ~110 psi at 125F...or ~120 psi at 180F.
Last edited by Looigi; 05-19-14 at 10:16 AM.