Ensure your semi is Ready for the Road Ahead with an equal distribution of tire pressure, with the Dual Dynamics 80 psi Cross Fire Dual Tire Pressure Equalization System. Thanks to its sophisticated design, this replacement valve is able to seamlessly mount between dual tires to allow for a free flow of air to maintain equal pressure levels. Crafted with ultra-strong materials to withstand extreme pressure levels. FleetPride is your First Click in Heavy Duty .