6x2 Liftable Forward Tandem Axle and Suspension System
OPTIMIZE fuel economy and weight savings
on Freightliner Cascadia®


Features and Benefits

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.

OPTIMIZE Automated Controls

Proprietary program logic controls lift axle movement, load transfer

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


Axle configuration saves weight and can help improve fuel economy

  • Saves up to 400 pounds versus traditional 6x4
  • Achieves up to 3% fuel economy improvement through eliminating one drive axle (6×2 configuration)
  • Provides up to 2% fuel economy improvement through lifting the non-drive axle (4×2 configuration)
  • Lifted axle saves on tire wear to help reduce tire maintenance costs
  • Potential savings on toll charges

OPTIMIZE Traction and Handling

Lifted axle 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 disc and drum brakes

RUN Position

Axle lowered for 6×2 configuration — The OPTIMAAX system senses higher load conditions and lowers the non-drive axle

LIFT Position

Axle lifted for 4×2 configuration — The OPTIMAAX system senses lighter load conditions and lifts the non-drive axle

Actual product performance may vary depending upon liftable axle and vehicle configuration, operation, service and other factors.

Team Run Smart Blog Article







ROI Calculators

OPTIMAAX® System vs. 6x2 Configurations ROI Calculator

OPTIMAAX® System vs. 6x4 Configurations ROI Calculator

The calculators are intended for reference purposes only. All calculator results are strictly estimates. Actual results (including but not limited to return on investment, revenue, mileage, fuel savings, maintenance savings, product life cycle costs, and performance) may vary depending upon suspension and overall vehicle configuration, specifications, operation, service, maintenance, loads, applications, environment, and other factors. The calculator and its results do not constitute a representation or warranty of any kind by Hendrickson. Please click on the Terms of Use link at the bottom of this website page for additional terms and conditions.






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