The best way to improve the ride of my C4500 flatbed is to put about 4000# of weight on the back of the truck, in the form of pin weight from the gooseneck, or hitch weight (~1500#) from a boat...

The suspension is designed to carry another 2000# per wheel, without it the ride really suffers. If I was setting up a C4500 for a daily driver or show truck, air bags would be my choice.

Next time I'll do my homework in advance and get a set of Bilsteins...