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Heavy Duty Rear Air Suspension

PRIMAAX® EXTREME is a premium, heavy-duty air suspension designed specifically for the rigorous demands of vocational, severe-service and heavy-haul applications.

The optimized geometry features a new frame hanger and torque rod configuration that provides increased roll stiffness and reduced roll steer for improved handling. Suspension-induced driveline vibration is significantly reduced with PRIMAAX EXTREME compared to competitive trailing-arm air suspensions.


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  • Specifically designed for demanding on/off road conditions.
  • Greater stability for improved control
  • Improved road feel
  • Reduced roll steer
  • Improved handing
  • 12.5 degrees of diagonal wheel articulation and 8 degrees of vertical axle travel for greater traction