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Hendrickson Truck Ultimaxx SuspensionThe Ultimaxx Advanced Heavy-duty Rubber Suspension is engineered for severe-duty vocational markets, durability its cornerstone feature. "This system has been through more extreme testing than any product developed by Hendrickson to date, including component validation and severe proving grounds testing. We've worked with key fleets, running early prototype test units in some of the most extreme applications in North America for the last five years," says Hendrickson Director of Engineering Ashley Dudding.
Available in capacities of 46,000, 52,000 and 60,000 lb., Ultimaxx optimizes weight savings, resulting in a product that is reportedly hundreds of pounds lighter than competitive suspension systems for higher payloads. The suspension delivers enhanced stability, handling and ride quality even in the most severe-duty environments where vehicles encounter harsh and unexpected ground conditions. The integration of walking (equalizing) beam technology, with patented progressive rate spring, provides a balance of loaded stability and unloaded ride quality even in the most rugged environments. In the empty or lightly loaded condition, shear springs carry a majority of the vertical load, netting a constant low spring rate and ride quality.
Due to the advancements of the progressive rate spring, as load increases, the suspension ride and stability characteristics change to meet the application's needs without an abrupt change in spring rate. That dynamic reduces road shock and vibration transfer to the vehicle, which contributes to longer service life of the cab, chassis and body equipment.
Where mobility and traction are concerned, Ultimaxx equips vehicles for some of the harshest terrains. By nature, the walking beam design utilizes a central pivot point to help keep tire contact with the ground and maintain traction in challenging environments. However, Hendrickson cites advanced walking beam technology with new breakthrough features, including a flat-bottom design for increased ground clearance. In addition, the system offers up to 17.5 in. of loaded diagonal articulation and an increase in unloaded articulation, owing to high-performance beam end and center bushings. — 630/910-2800;

Suspension Selector Tool
Posted at, the Vocational Truck Suspension Selector Tool provides users rear-suspension recommendations for general truck and tractor operations in vocational and severe-service applications. Results are calculated based on selections related to intended application, vehicle axle configuration, gross rear axle weight rating, and suspension type. Recommendations can then be printed for future reference or researched further by following the quick links back to the Hendrickson website for more information on specific suspension systems. The Selector Tool suits fleet planning, dealer sales people, and general information gathering to learn more about which company suspensions are recommended for common types of vehicle applications, configurations and specifications.