Keeping you Ready for the Road Ahead™, the ContiTech Air Spring 64571/3B12-312/4525 achieves constant and low natural frequency between tare and full load. This ensures effective cargo protection, even on poor road surfaces, excellent comfort and health protection for the truck driver, and safe driving conditions. These air springs also offer the ability to lower or raise the truck's body height to match a ramp's elevation or to set up a compatible platform. FleetPride knows you need quality suspension and steering parts to reduce wear and tear and ultimately, downtime. Whether you need cab, truck or trailer air springs, we have the heavy duty air bags you need for a quiet, stable ride FleetPride is your First Click in Heavy Duty®.