Originally Posted by OmegaQuest
I have read that I can add a leaf or air bags to add more "max payload" (not GVWR) to a truck. Is this not true?
I'll tell you what I've read- but I'll also be the first to tell you I don't know enough about trucks/vehicles in general to understand it. "They" (the Internet) say that air bags and helper springs can't increase a truck's payload. However, lots of people can argue against it and I don't have the background/basis for understanding either side of the argument.
Now, as a matter of semantics (and it likely doesn't matter for the discussion at hand) - simply from a math perspective, you can't add payload without increasing the maximum the truck can carry (e.g. GVWR).
Payload = a - b
Where a= the truck's GVWR and b = the weight of the truck and everything in/on it
The only way you can increase the payload number is to decrease truck weight or increase the GVWR.
From a simply math view- adding a leaf or air bags technical adds to the truck's weight and would decrease its payload. Now, from an actual technical perspective, it may help you carry more (or may not- again, I don't know enough to do anything but repeat what I've read).