Get your semi Ready for the Road Ahead™ with enhanced comfort, stability, and control, with the Dayton Parts Full Tapered Rear 4-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. Fashioned with a flexible body to prevent broken axles and bolts. FleetPride is your First Click in Heavy Duty®.