Hendrickson PRIMAAX EX Heavy-Duty Vocational Rear Air Suspension

Hendrickson's PRIMAAX EX heavy-duty suspension delivers up to 12.5 in. of diagonal articulation for improved ride quality.

Hendrickson Truck Commercial Vehicle Systems' PRIMAAX EX heavy-duty vocational rear air suspension was designed specifically for the rigorous demands of vocational, severe and heavy-haul applications.

  • Features superior durability, ride, stability and suspension articulation
  • Can be packaged with both drum and disc brakes
  • Approved for 100% off-road usage to help conquer challenging terrains
  • Incorporates highly durable structural beams that integrate the cross beam attachment points for greater reliability, resulting in a maintenance-free connection that forms a rigid torsion system for improved stability and control for both off-road and heavy-haul applications
  • Includes optional arched longitudinal torque rods that provide clearance necessary for disc brakes
  • Features robust frame hanger and unique torque rod configuration
  • Optimized suspension geometry delivers over twice the roll stiffness of other vocational rear air suspensions and greater control during lane changes, highway ramp operation and tight or twisting road maneuvers
  • Large-volume air springs smooth the ride and reduce noise, vibration and harshness to the cab, chassis and body equipment for less wear and tear on both driver and equipment
  • Delivers up to 12.5 in. of diagonal articulation
  • Helps improve traction and provide greater off-road mobility
  • Up to 10.75 in. of ground clearance enhances maneuverability over rough terrain




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