Back in the day they would offer different air springs I believe. It's simple, you air it up till a line on the shock is visible from the dust shield. Lighter, less air pressure needed to expose the line. Heavier, more air needed. I would contact trailair for their advice.
2017 Eagle 293RKDS, factory ordered, lots of mods and upgrades. More than I can list.
2018 Ram 3500 crew cab long bed SRW diesel 6spd Aisin 4wd Tradesman.
B&W Ram puck 5th wheel
Mopar wheel to wheel steps