Start with the ratings
- GVWR: the most the truck may weigh, loaded. It is on the door-jamb label.
- GAWR: the most each axle may carry.
- GCWR: truck plus trailer, loaded.
- Hitch ratings: the hitch, ball and receiver each have their own limits. The lowest one wins.
NHTSA and Air Lift both make the same point: adding air bags, springs or other suspension parts does not raise the manufacturer's ratings. Everything you add to the truck also comes out of payload.
Hitches: receiver, gooseneck, fifth wheelTowingAir bags, traction bars and helpersTowingTrailer brakes and exhaust brakeTowing
Questions
Do air bags increase towing capacity?
No. Air Lift and NHTSA guidance both say suspension add-ons do not raise GVWR or the maker's ratings. They can level the truck and improve how it rides under load.
Where this comes from
- Ram Trucks: Towing basics (PDF)
- NHTSA interpretation 8079: GVWR and vehicle alterations
- NHTSA interpretation: trailer hitch and towing ratings
- Air Lift: User guide AD-938 (air springs do not increase load capacity, PDF)
Last reviewed 2026-10-19. General information only: your owner's manual and service information come first.