HT Series

Underslung Air Suspension

HT Underslung Air Suspension

The HT SERIES delivers rugged dependability and outstanding ride quality and control for vans, platforms, dumps, tankers, dollies and pups, lowboys, auto haulers, trailers on flat cars, B-trains, Michigan trains and container chassis. Our patented TRI-FUNCTIONAL® Bushing in unison with a rigid beam and solid axle connection provides the ideal combination of ride softness and roll stability.

Hendrickson recommends reviewing our application guide when choosing the suspension that best meets your needs.  
 L707 Application Guide

HT Underslung Air Suspension

Features and Benefits

Conventional Ride Heights

  • Single-axle capacities from 20,000 pounds to 30,000 pounds
  • Ride heights from 12 to 23 inches
  • Spacing from 49 to 122 inches, tri- or quad-axle up to 144 inches

Low Ride Heights

  • Single-axle capacities from 20,000 pounds to 30,000 pounds
  • Ride heights from 4 to 17 inches
  • Excellent ground clearance on liftable models
  • Axle spacing from 49 to 122 inches

Single-Axle Applications

  • The HT SERIES is available in a HIGH CONTROL version for use on trailers with multi-articulation points like doubles, triples, B-trains, dollies and full trailers
  • Single-axle capacities from 20,000 pounds to 30,000 pounds
  • Ride heights from 4 to 23 inches

Unparalleled Support

  • 5-year/500,000-mile structural warranty
  • Backed by thousands of dealers
  • Off-the-shelf replacement parts


  • Proven technology provides mile after mile of worry-free service
  • Voids positioned to optimally absorb all road forces
  • The ideal combination of ride softness and roll stability
  • Specially formulated rubber compound stands up to the toughest operating conditions
  • Only two long-life bushings in each suspension — fewer than any other design
  • Five- or seven-year warranty depending on application

Rigid Trailing Arm/Solid Axle Connection

  • Simplicity of design reduces the number of moving parts, bushings and fasteners for minimal maintenance
  • Provides superior stability while eliminating torque rods and stabilizer bars
  • Eliminates retorquing requirements
  • Low spring rate for exceptional ride quality
  • Compatible with industry standard axles
  • Large bore shocks for longer life

QUIK-ALIGN® Pivot Connection (Standard on Most Models)

  • Provides quick, easy axle realignment
  • Save time and money should axle realignment become necessary
  • TORQ-RITE® shear bolt eliminates guesswork
  • Realign using standard tools — no torque wrench or welding required
  • Optimize tire life


Base Model Reference Suspension Capacity1 (LBS.) Suspension Ride Height2 (IN.) Base Model Weights3 (LBS.)
HT190U 20K 6-12 317
HT250US 25K 3.5-14 344
HT300US 30K 5.5-17 375

1. Capacity of primary suspension only; axle not included.

2. Suspension ride heights must be set within Hendrickson specifications in order to provide load equalization among axles and to ensure proper suspension performance. Failure to maintain proper ride height settings can lead to suspension, axle or trailer damage.

3. Weight shown does not include the axle or the frame bracket crossmember.


File Name Rev. Date Size

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