Based on your vehicles Gross Vehicle Weight Rating (GVWR), air bags will help stabilize and maximize your load carrying capacity with individual inflation valves, allowing for adjustment from side-to-side and from front-to-rear. This will improve steering control, level headlight beams and improve tire wear. Because of the convoluted or tapered style, they will reduce suspension fatigue, which will keep leaf springs from sagging under repeated or continual loads. By allowing the springs to match the load, the air adjustment improves the ride and provides a softer air cushion between the axle and the frame. While providing a smoother ride, it insures more ideal riding conditions both for the passenger and the load, and protecting your truck or SUV for unwarranted residual damage from rougher terrain.