Electronic Air Control System

Click here for R-Series model matrix

The R-Series AM combines Reyco Granning’s familiar R-Series drive axle air suspension with the latest air supply module called AirMaster®.  The system is a turn-key bolt-in upgrade to replace the inferior factory leaf spring suspension on Shuttle Bus, Ambulance, RV and Work Truck applications with Ford, Ram, GM, and EV chassis.The R-Series was designed to improve ride quality, manage body height, and permit kneeling relative to a factory leaf spring.

The AirMaster is factory certified leak free, eliminates air-line freezing, and dramatically improves compressor life relative to legacy air supply systems.  The R-Series AM combination enhances vehicle productivity, driver comfort, and resale value.  The outcome is an astounding 457 pounds lighter, with an acquisition cost of $2,500 less than the Liquid Spring CLASS® equivalent.

The R-Series® or AirMaster® can also be purchased separately.

Part Number K714393
For more information on the AirMaster click here



  • Pre Plumbed
  • Electronic height control system
  • Integrated air dryer
  • Automated calibration and diagnostics
  • Quick exhaust and fill cycle time
  • Kneels while maintaining residual air pressure
  • Integrated into a single enclosure
  • Low amperage draw


  • 100% certified leak free module
  • Less compressor run time for significantly longer life
  • Eliminates airline freezing
  • Plug and play design
  • Eliminates delays
  • Improved response time
  • Simplified installation and quiet operation
  • Perfect for electric vehicle