Hendrickson expands Primaax Ex offering at International
Hendrickson Truck Commercial Vehicle Systems has teamed up with International Trucks to launch new variants of the Primaax Ex rear air suspension system, designed for severe-duty vocational trucks.
These enhancements include a 12-inch ride height and a 52,000-lb. capacity option with air disc brake compatibility, specifically for International’s HV truck model.

The updated Primaax Ex is engineered to handle the demanding environments of construction, refuse, logging, and heavy-haul operations, the company says in a news release. The 12-inch ride height improves weight distribution and vehicle stability, while the air disc brake option offers repeatable stopping distances for heavy loads. Primaax Ex is available in configurations ranging from 23,000 lb. single-axle setups to 78,000 lb. tridem systems.
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This was my son’s project lat year at Navistar.