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Truck > Vocational > PRIMAAX® EX

PRIMAAX® EX

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Severe-duty Vocational Air Suspension

With its rugged, weight efficient design, PRIMAAX® EX is a severe-duty vocational air suspension that delivers advanced suspension technology for the rigorous demands of vocational, severe-service, and heavy-haul applications. The system features a robust structural design with optimized suspension geometry for exceptional stability, handling and ride. Suspension-induced driveline vibration is significantly reduced with PRIMAAX EX compared to competitive trailing-arm air suspensions, resulting in higher driver comfort and less premature wear on expensive truck and body equipment.

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Introducing TRAAX ROD™

TRAAX ROD™ torque rods offer up to 5X* the performance life of conventional double shot bushings and similar performance of ball and socket torque rods, with better energy absorption, delivering best in class bushing retention and longer component life for heavy- and severe-duty applications.

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  • Advanced structural beams utilize premium materials for high durability and reliability
  • Robust frame hangers enhance system durability to meet a variety of grueling vocational and severe-duty applications
  • Optimized suspension geometry contributes to more than twice the roll stability of competitive air suspensions, helps improve handling and roll stiffness for expanded applications and significantly controls suspension-induced driveline vibration
  • Structural beams include integrated end caps that form a solid connection with the square cross brace to form a rigid torsion system for improved stability and control
  • Superior off-road mobility with up to 12.5 inches of diagonal wheel travel and 8 inches of vertical axle travel
  • Large-volume air springs lift and support the load with less air pressure, while providing superb ride quality
  • Premium, heavy-duty bushings require no lubrication for reduced maintenance
  • QUIK-ALIGN® system helps simplify axle alignment for reduced maintenance time and extended tire life