The air springs are rated for 2500 lbs each. Does that mean I can haul 5000 lbs in the back of my truck?
Not necessarily. The maximum total weight that the vehicle has been designed for, the GVRW (Gross Vehicle Weight Rating), needs to be followed. Violation of the GVWR can result in fines, loss of liability insurance, or overwhelm your vehicle's brakes or drivetrain. Check your vehicle's owners manual for the rating.