Hendrickson Truck Commercial Vehicle Systems
Primaax Ex

Hendrickson to offer Primaax EX suspension for Peterbilt trucks

Aug. 17, 2023
The air suspension system for severe-duty and vocational trucks will be available for a spate of Peterbilt models.

Hendrickson Truck Commercial Vehicle Systems has partnered with Peterbilt to offer the Primaax EX 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 lb. and have a 10-inch ride height. It 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 of sales and marketing for Peterbilt Motors.

See also: Peterbilt Model 589: A closer look

The Primaax EX suspension is designed specifically for the demands of vocational and severe service, such as construction, refuse, mixer, logging, and heavy-haul applications. Primaax EX incorporates optimized suspension geometry, which minimizes driveline vibrations and controls suspension windup and corresponding frame rise, according to the Hendrickson press release. 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.

Primaax EX offers a full range of suspension scalability from 23,000-lb. single axle configurations up to 78,000-lb. tridem setups.

“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,” said 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.”

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