The PRIMAAX® EX heavy-duty rear air suspension provides a package of benefits tailored for bus, RV and medium-duty applications. The system features a robust structural design with optimized suspension geometry for exceptional stability, handling and ride. Suspension windup and corresponding frame rise are significantly reduced with PRIMAAX EX compared to competitive trailing-arm air suspensions, for enhanced driver and passenger comfort.
Model | PRIMAAX EX | |
---|---|---|
Capacity (lbs) | 23,000 | 23,500 |
Installed Weight1 (lbs) | 542 | 651 |
Axle Configuration | Single | Single |
GCW Approval2 (lbs) | Contact vehicle OEM2 | Contact vehicle OEM2 |
Axle Travel4 (in) | 8 | 8 |
Ground Clearance (in) | 10.75 | 10.5 |
Lift Axles | Approved | Approved |
Ride Heights5 (in) | 8.5 to 10.5 12.5 to 15.5 |
8.5 to 10.5 12.5 to 15.5 |
Engine Torque Restrictions | None | None |
Axle Spacing (in) | N/A | N/A |
1. Installed weight includes complete suspension, torque rods, axle and frame brackets and all hardware. Published weight is for standard PRIMAAX EX suspension using 10.0-inch ride height. Other configurations may change weight.
2. Suspension must be paired with appropriate axle rating.
3. Site Travel Rating — Operators using vehicles equipped with liftable push or tag axles must not exceed published ratings. Ratings are limited to no more than five percent of vehicle operation at a speed not to exceed five mph. Liftable pusher or tag axles should be raised (or unloaded) to improve vehicle maneuverability in off-road use or when vehicle is empty. Site travel ratings are consistent with specifications and must not be exceeded.
4. Axle travel may be limited by vehicle manufacturer; axle stop settings and shock stroke may restrict suspension's articulation. Varying ride heights and configurations may restrict travel.
5. For different ride height options, please contact Hendrickson, your truck manufacturer or dealer for further information.
6. Refer to axle manufacturer's recommendation.
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