Bendix Commercial Vehicle Systems SMARTIRE TPMS OPERATORS MANUAL - Manual (Page 11)

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For example, a tire inflated to a CIP of 105 PSI at 65°F will increase in pressure to 125 PSI at
152°F and decrease in pressure to 97 PSI at 32°F. The SmarTire
™
tire monitoring system
considers these changes in temperature and pressure as part of normal operation and adapts
accordingly to provide more accurate information while helping to prevent false alerts.
Tire manufacturers never recommend inflating a tire to less than the specified cold inflation
pressure. In extreme cases, the beads of a commercial tire can unseat if its pressure gets too low
resulting in a catastrophic tire failure.
Always refer to the vehicle manufacturer’s recommendations for minimum cold inflation
pressures.
The charts below illustrate the equivalent inflation values for a series of cold inflation pressures at
various temperatures. The temperature values represent the temperature of the air contained
inside the tire. This temperature can be estimated for a cold tire using the outside, ambient
temperature.