Temperature Compensation

No matter how hot it is outside or how hot a tire gets rolling down the road, SmarTire Bus' temperature compensation will always provide accurate tire inflation information. After all, temperature is a tire's biggest enemy.

As a tire deflates, its rolling resistance increases and its operating temperature goes up. As its temperature increases, the air inside the tire expands so the tire appears to be operating at correct inflation. When measured using a non-temperature compensated gauge, a tire can be 30% under-inflated and still appear to be normal. SmarTire Bus measures a tire's temperature in addition to pressure in order to do a temperature compensation calculation. The system provides deviation numbers in its on-demand tire information and first level alert showing exactly how many PSI under or over inflated a tire is at its operating temperature.