Outfit your semi to be Ready for the Road Ahead with an equal distribution of tire pressure, with the Dual Dynamics 95 psi Cross Fire Dual Tire Pressure Equalization System. With a sophisticated design, this replacement valve seamlessly mounts between dual tires to allow for a free flow of air to maintain equal pressure levels. Manufactured with rugged materials to tolerate extreme pressure levels. FleetPride is your First Click in Heavy Duty .