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Suspension Systems > PRIMAAX EX


Medium-duty drive axle air suspension system

PRIMAAX®, medium-duty air suspension for tractor and rigid truck applications, maximises driver comfort and vehicle protection. Rated up to 10.5 t, PRIMAAX adjusts to variations in load and road conditions for optimal ride and performance.

Unique suspension geometry, parallelogram design with forged support beams and square cross brace, provides a solid connection and forms a rigid torsion and stabilizer system.

This integrated feature delivers greater stability for improved control.

Capacity: up to 10.5t
Application: For tractor and rigid truck applications


Sales Literature

Outstanding ride

  • Superior ride and handling provide enhanced driver comfort and protection to vehicle loads and body
  • Non-reactive to brake and acceleration torque
  • Roll-resistant design simplifies installation and maintenance

More road time

  • Proven in arduous conditions
  • Hendrickson's torsion bar eliminates the need for a costly anti-roll bar
  • Reduces weight — Increases load, ensuring maximum profitability for the end user
  • Improves packaging


  • Suitable for tractor and rigid applications
  • Unique suspension geometry— Parallelogram design significantly controls suspension wind up and corresponding frame rise— Driveline angles are maintained throughout axle travel, thereby reducing suspension-induced driveline vibration and extending component life