PRIMAAX EX Launched at Peterbilt

August 17, 2023


For Immediate Release

For more information contact:
Mark Slingluff
(330) 489-0050

WOODRIDGE, IL. (August 2023) – Hendrickson Truck Commercial Vehicle Systems announced today that they have partnered with Peterbilt to offer PRIMAAX® EX - the severe-duty vocational air suspension system as a part of the chassis enhancements for the Peterbilt  567, 579 and 589 models. PRIMAAX® EX will be available in capacities of 46,000 and 52,000 pounds, have a 10 inch ride height and is compatible with drum and air disc brakes.   

“Peterbilt is excited to expand our partnership with Hendrickson by adding the PRIMAAX EX to our suspension offerings,” said Jake Montero, Assistant General Manager – Sales and Marketing for Peterbilt Motors.

The PRIMAAX® EX suspension is designed specifically for the rigorous demands of vocational and severe-service such as construction, refuse, mixer, logging and heavy-haul applications. The system features a robust structural design which enhances durability, reliability and handling. PRIMAAX EX also incorporates optimized suspension geometry which helps minimize driveline vibrations and control suspension windup and corresponding frame rise. Premium heavy-duty rubber bushings require no lubrication and are performance tested for longer service life. The suspension provides enhanced stability and handling for vehicles with heavy loads and high centers of gravity confidently negotiate tight turns with minimal sway.

“PRIMAAX® EX has grown tremendously in popularity over the years and has become widely accepted by fleets throughout the industry as their preferred 100% off-highway approved vocational air suspension for multiple severe-duty applications,” says Sean Whitfield, Director of Marketing at Hendrickson Truck Commercial Vehicle Systems.  “We are excited to partner with Peterbilt to expand the availability of PRIMAAX EX across the full breadth of their vocational model lineup to bring the tremendous advantages of PRIMAAX EX to more Peterbilt customers.”

PRIMAAX EX offers a full range of suspension scalability from 23,000 pound single axle configurations up to 78,000 pound tridem setup.

For additional information on PRIMAAX EX and all Hendrickson truck suspensions, please contact Hendrickson Truck Commercial Vehicle Systems at 1-855-743-3733 or visit

Hendrickson, a Boler company, is a leading global manufacturer and supplier of medium- and heavy-duty mechanical, elastomeric and air suspensions; integrated and non-integrated axle and brakes systems; tire pressure control systems; auxiliary lift axles systems; parabolic and multi-leaf springs; stabilizers; bumpers; and components to the global commercial transportation industry. Hendrickson, based in Woodridge, IL., USA, continues to meet the needs of the transportation industry for more than 105 years. Visit Hendrickson at

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