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Truck > On-Highway > OPTIMAAX®


Liftable Forward Tandem Axle and Suspension System

Hendrickson’s OPTIMAAX® system is a revolutionary 6×2 solution to help fleets save fuel cost, tire wear and weight with comparable handling to 6×4 tandem axle configurations. Operating as a liftable axle in the forward tandem position, this system provides versatility for fleets with variable loads. The OPTIMAAX system is ideal for fleets in need of additional flexibility for on-highway tractor applications.


Sales Literature

Parts Lists


OPTIMAAX (Lift Axle) Compliant Guide

This guide summarizes where OPTIMAAX operation complies with state operating authority regulations. Because state and provincial regulations are subject to change, links to the operating authority websites are included as an additional resource.

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OPTIMIZE Automated Controls

Proprietary program logic controls lift axle movement, load transfer and braking functions

  • Fully automated controls eliminates driver intervention and training
  • Automates axle lowering and lifting by sensing load capacities


Axle configuration saves up to 400 pounds and can help improve fuel economy by 3-5 percent*

  • Achieves up to 3 percent additional fuel economy improvement through eliminating one drive axle (6×2 configuration)
  • Provides up to 2 percent additional fuel economy improvement through lifting the non-drive axle (4×2 configuration)
  • Lifted axle saves on tire wear reducing tire maintenance costs

OPTIMIZE Traction and Handling

Lifted axle position provides increased traction by increasing drive axle load

  • Improved traction when backing under trailers in soft soil or wet conditions versus traditional 6×2
  • Maintains vehicle handling characteristics by keeping the drive axle behind the fifth wheel


  • Ideal for diminishing load carriers such as: bulk haulers, grocery, livestock, beverage or applications experiencing empty back hauls
  • Includes integrated lift axle, suspension and automated controls
  • Available in 20,000 pound capacity
  • Compatible with drum brakes