Why air bags? To level a load that is too heavy on the hitch? Because the tow vehicle is towing too heavy for its rating? To make the road surfaces easier on the back side? Help us understand, ple...
I have used them on two trucks to help level the truck and also the trailer. If you set them up to fill independently of each other you can also fine tune the side to side level by adding just a few extra lbs. to the low side.