That differs from my experience. In both of my LJs, there are several inches above and below the air bags inside the springs - in other words the bags are shorter than the springs. These are the factory springs and the recommended Air Lift kit for the factory springs and the bags are shorter than the springs. By keeping them at no less than the recommended minimum pressure, they don't move. But if you decide on air bags you should take whatever advice you get from the company.While it is true the bags provide some load support by exerting pressure on the could, they can also slide up and down. If the bag is too short, then you actually can unintentionally create a multirate spring...and cause a bad/unexpected bounce when the bag is finally compressed : source - Airlift. Experienced the slide and bounce first hand.
Reason I know this - my original set from airlift had the wrong bags ( too short) included. I called and spoke to their PM about the issues I was having...so in short, I would need the longer bag if I opt to go that route...
sent via the cone of silence