General Medium Duty C&C 2-Stage Rear Air Suspension

Watch this suspension in action here on our YouTube channel:

Adding a Kelderman Air Suspension conversion kit to your existing suspension will provide a level of comfort you thought was impossible. This is particularly true when the truck is not loaded. By loosening the rear spring shackle from the frame and attaching it to the air ride you've effectively provided yourself with a two-stage suspension system that smoothes the road. The Kelderman Air Suspension is not to be confused with just adding an air bag between the axle and the frame. This type of system is merely a helper for the springs to allow additional weight carrying capacity. It does nothing for the riding qualities of the vehicle and in many situations degrades the ride. You do not get additional load carrying capacity with the Kelderman system, nor do you sacrifice capacity. The only thing you gain is ride comfort. Iisn't that exactly what you're after? 

An upper framework is bolted to the truck frame. A lower swing arm is attached to the upper framework at the rear pivot point. The spring shackles are attached to the lower swing arm and the air bags are mounted between the upper framework and lower swing arm units. It's really that simple to convert your truck to air ride comfort. All components are constructed of high quality materials for reliability and a long service life.

System designed to fit any Class 6 & 7 trucks with 34" frame widths (outside to outside).



  • Easy to install (bolts onto existing holes on truck frame)
  • Maintenance free
  • Dramatically improves the truck's ride
  • Reduces shock and fatigue
  • Does not effect load carrying capacity
  • Converts your system into a 2-stage suspension