Ensure your truck or trailer is Ready for the Road Ahead with enhanced comfort, stability, and control, with the Dayton Parts 4400 Series Rear 14-Leaf Spring. Thanks to its layered design, this replacement component is able to provide additional support to the front, center, or rear of a vehicle to absorb shocks and minimize vibrations. Crafted with a flexible body to decrease the chance of broken axles and bolts. FleetPride is your First Click in Heavy Duty .