While in motion, your truck's inner tire temperature increases due to in-board brakes and poor air circulation. This causes an increase in air pressure, which expands the inner tire's diameter. This results in a distorted dual tire configuration with the diameters unequal.

The Crossfire system is a pressure equalizer and monitoring valve that is mounted between dual tires. When properly mounted, air flows from one tire to another, maintaining equal tire pressure and load distribution.