Find Your Suspension

ZMD®  ZERO MAINTENANCE DAMPING® 

Hendrickson's ZERO MAINTENANCE DAMPING exclusive ride technology

ZMD - Zero Maintenance Damping

Available as a premium option on select VANTRAAX and INTRAAX  integrated air suspension system models and standard on  ULTRAA-K air slider supension systems. ZMD technology eliminates shock absorbers from the maintenance equation by integrating the damping function traditionally performed by the shock within the air spring itself. ZMD air springs exchange pressurized air between the bellows and the piston. This patented air spring provides uniform and consistent damping over the life of the air spring.

ZMD - Zero Maintenance Damping

Features and Benefits

ZERO MAINTENANCE DAMPING®

 

  • Reduced overall suspension maintenance due to the elimination of the shock absorber
  • Reduced risk associated with roadside inspections for worn or damaged shock absorbers
  • Superior ride quality
  • Enhanced cargo protection
  • Increased trailer component life
  • Uniform damping levels over the life of the air spring

Specifications

Model System
Capacity (lbs.)		 Axle
Diameter (in.)		 Ride Heights (in.) Notes
ULTRAA-K®
UTKNT 40K 40,000 LDA™ Large-Diameter Axle 16 Standard
VANTRAAX®
HKANT 40K 40,000 LDA 16 Optional; Requires QUIK-DRAW®
HKANT 46K 46,000 LDA 16, 17 Optional; Requires QUIK-DRAW®
HKANT 23K 23,000 LDA 16, 17 Optional; Requires QUIK-DRAW®
HKANT 69K23 69,000 LDA 16, 17 Optional; Requires QUIK-DRAW®
HKAT 50K 50,000 LDA 16, 17, 18 Optional; Requires QUIK-DRAW®
HKAT 69K25 69,000 LDA 16, 17, 18 Optional; Requires QUIK-DRAW®
HKAT 75K25 75,000 LDA 16, 17, 18 Optional; Requires QUIK-DRAW®
INTRAAX®
AANT 23K 23,000 LDA 14, 15, 16, 17 Optional;  std. travel only
AAT 23K* 23,000 LDA 14, 15, 16, 17 Optional;  std. travel and limited rebound*
AAT 25K* 25,000 LDA 14, 15, 16, 17, 18, 19 Optional;  std. travel and limited rebound*
INTRAAX® SP
AAZNT 23K 23,000 LDA 13.5, 14, 15, 16, 17 Optional
AAZNT 46K 46,000 LDA 13.5, 14, 15, 16, 17 Optional
AAZNT 69K23 69,000 LDA 13.5, 14, 15, 16, 17 Optional

*RCA Raised-Center Axle is available on AAT23K models equipped with ZMD for both standard and limited rebound travel. Only 14" or 16" ride heights are available with limited rebound travel when spec'ing RCA.

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