Re: Is an air bag a progressive rate spring?
If you look at a progressive rate spring, it is obvious. Instead of a smooth spiral coil, the coil has some close and some farther apart. you get the low weight spring working when the vehicle is empty and it is a softer ride. As you add weight, the heavier part of the coil comes into play and keeps you from bottoming out. On the tundra leafs, the bottom flat leaf does the same thing
On a shock, the only increased dampening is if the shock is designed to dampen at a higher rate if the piston is lower than normal.
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