Outfit your semi to be Ready for the Road Ahead with a soft and smooth ride, with the ContiTech 67447/8934 Single Rolling Lobe Air Spring for Trailer Axles. With a bellow-like bag design, this replacement air spring lifts or lowers the ride height of a vehicle to optimize comfort, handling, or other features. Manufactured with tight seals to minimize air leakage and deliver superb suspension. 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 .