Hendrickson STEERTEK NXT Steer Axle

Quick Facts

  • Manufacturer: Hendrickson
  • Product Name: STEERTEK NXT
  • Axle Type: Non-driven front steer axle
  • Construction: Fabricated steel axle beam
  • Standard On-Highway Capacity Range: Approximately 12,350 to 14,600 pounds
  • Medium-Duty and Bus Capacity Range: Approximately 8,000 to 14,600 pounds
  • High-Capacity Fire and Rescue Range: Approximately 16,000 to 24,000 pounds
  • Maximum Wheel Cut: Up to 50 degrees
  • Brake Compatibility: Integrated air disc, bolt-on disc, or drum brakes, depending on configuration
  • Kingpin System: Application-specific kingpins with premium bushings, bearings, and seals
  • Suspension Compatibility: Available as a standalone axle or integrated with selected Hendrickson suspension systems
  • Primary Applications: Highway trucks, medium-duty trucks, buses, motorhomes, vocational trucks, and fire and rescue vehicles
  • 2025 Design Update: Up to 25 pounds of additional weight savings compared with the previous STEERTEK NXT generation
  • Product Page Slug: hendrickson-steertek-nxt-steer-axle

Overview

The Hendrickson STEERTEK NXT is a lightweight fabricated front steer axle designed as an alternative to a traditional forged I-beam axle. It is used in highway trucks, medium-duty vehicles, buses, motorhomes, vocational trucks, and specialized fire and rescue vehicles.

The STEERTEK NXT family covers a broad range of applications rather than one universal axle configuration. Standard truck versions are available at common ratings from approximately 12,350 to 14,600 pounds, while medium-duty and bus configurations can extend down to 8,000 pounds.

Specialized high-capacity versions developed for fire, rescue, and heavy vocational equipment can carry ratings from approximately 16,000 to 24,000 pounds. These versions have different dimensions, suspension integration, wheel ends, and brake packages from standard highway axles.

Key Characteristics

STEERTEK NXT uses a fabricated box-section axle beam instead of a conventional forged I-beam. The box-shaped design resists vertical, horizontal, and twisting forces while maintaining a favorable strength-to-weight ratio.

The continuous beam architecture reduces concentrated stress points. Integrated axle seats can improve ground clearance, reduce the number of separate components, and simplify installation.

Premium kingpin bushings and seals help protect the steering joints from contamination. Depending on the application, the axle can use integrated air disc brake knuckles, bolt-on brake arrangements, or specialized two-piece knuckles.

The axle is engineered to provide wheel cuts of up to 50 degrees when the truck’s tires, wheels, steering stops, suspension, and chassis permit the full turning angle.

How the Axle or Differential Works

The fabricated axle beam spans the front of the truck and carries a steering knuckle at each end. Kingpins, bushings, and bearings allow the knuckles to pivot while supporting the vehicle’s front weight.

Movement from the steering gear is transferred through the pitman arm, drag link, steering arm, tie rod, and knuckles. These components turn both front wheels together while maintaining the required steering geometry.

The axle beam transfers vehicle weight, road impacts, cornering loads, and braking forces into the suspension and chassis.

Because STEERTEK NXT is a non-driven steer axle, it does not contain a differential, ring gear, pinion, or drive axle shafts.

Axle Position and Function

STEERTEK NXT is installed beneath the front of a compatible commercial vehicle. It supports the engine, cab, front chassis, accessories, body equipment, and part of the payload.

Its main functions are carrying the front axle load, allowing the front wheels to steer, supporting the wheel ends, mounting the front brakes, and transferring vehicle forces into the suspension.

In integrated Hendrickson systems, the axle is engineered together with the springs, suspension brackets, shocks, and axle clamps. These components work as a complete front suspension and steering package.

Common Specifications

STEERTEK NXT is installed beneath the front of a compatible commercial vehicle. It supports the engine, cab, front chassis, accessories, body equipment, and part of the payload.

Its main functions are carrying the front axle load, allowing the front wheels to steer, supporting the wheel ends, mounting the front brakes, and transferring vehicle forces into the suspension.

In integrated Hendrickson systems, the axle is engineered together with the springs, suspension brackets, shocks, and axle clamps. These components work as a complete front suspension and steering package.

Common Specifications

  • Axle Configuration: Single non-driven front steer axle
  • Axle-Beam Construction: Fabricated steel box section
  • Standard Truck Capacity: Approximately 12,350 to 14,600 pounds
  • Integrated Air Disc Brake Capacity: Approximately 12,350 to 13,200 pounds on current standard configurations
  • Bolt-On Disc or Drum Brake Capacity: Up to approximately 14,600 pounds on current standard configurations
  • Medium-Duty and Bus Capacity: Approximately 8,000 to 14,600 pounds
  • Fire and Rescue Capacity: Approximately 16,000 to 24,000 pounds
  • Maximum Wheel Cut: Up to 50 degrees
  • High-Capacity Fire and Rescue Installed Weight: Approximately 1,655 pounds for one published integrated configuration
  • High-Capacity Axle-Beam Drop: Approximately 3.74 inches on one published fire and rescue configuration
  • High-Capacity Kingpin Intersection: Approximately 70.87 inches on one published configuration
  • High-Capacity Ride Heights: Approximately 8 to 11 inches, depending on installation
  • 2025 Weight Improvement: Up to 25 pounds lighter than the previous generation in applicable configurations

Exact capacities, dimensions, weights, brakes, wheel ends, kingpin intersections, and ride heights vary by vehicle and application.

Axle Ratios and Gearing

Axle ratios do not apply to the Hendrickson STEERTEK NXT because it is a non-driven front steer axle.

It does not contain reduction gears and does not transmit engine torque to the front wheels. The truck’s operating ratio is determined by its transmission, rear drive axle, and tire size.

Differential and Traction Options

STEERTEK NXT does not contain a differential. Open, locking, and limited-slip differential options therefore do not apply.

Front tire traction depends on tire selection, inflation pressure, vehicle loading, suspension behavior, road conditions, and electronic stability or braking systems.

A vehicle requiring powered front wheels needs a specialized front drive axle and all-wheel-drive system. STEERTEK NXT cannot provide front-wheel propulsion.

Brake and Wheel-End Options

Current STEERTEK NXT configurations can support integrated air disc brake knuckles, bolt-on disc brakes, or drum brakes.

Integrated air disc brake versions are offered at selected ratings from approximately 12,350 to 13,200 pounds. Configurations with bolt-on disc or drum brakes are available at ratings reaching approximately 14,600 pounds.

Medium-duty, bus, motorhome, vocational, and fire-rescue versions can use different brake and wheel-end packages. High-capacity fire and rescue configurations may use disc brakes or 16.5-by-6-inch drum brakes.

STEERTEK NXT is compatible with many industry-standard wheel ends and brakes, but final compatibility must be confirmed through Hendrickson and the vehicle manufacturer.

Common Applications

  • On-highway tractors
  • Regional-haul trucks
  • Medium-duty delivery trucks
  • Box trucks
  • Buses
  • School buses
  • Shuttle buses
  • Motorhomes
  • Municipal trucks
  • Vocational trucks
  • Fire engines
  • Rescue vehicles
  • Concrete pump trucks
  • Refuse vehicles
  • Specialized heavy front-axle applications

Truck, Suspension, and Drivetrain Compatibility

STEERTEK NXT is offered as a standalone axle and as part of integrated Hendrickson suspension systems.

AIRTEK NXT combines the axle with a front air suspension for compatible highway tractors. SOFTEK NXT combines it with a lightweight mechanical suspension.

Additional versions are engineered for medium-duty trucks, buses, motorhomes, fire apparatus, rescue vehicles, and specialized vocational chassis.

Compatibility depends on axle rating, suspension, ride height, kingpin intersection, spring centers, brakes, wheel ends, steering geometry, wheels, tires, and vehicle-manufacturer approval.

Advantages

  • Lightweight fabricated axle construction
  • High strength-to-weight ratio
  • Broad capacity range across multiple applications
  • Up to 50 degrees of wheel cut
  • Improved maneuverability
  • Integrated axle seats
  • Reduced component count
  • Premium kingpin bushings and seals
  • Integrated air disc brake availability
  • Bolt-on disc and drum brake compatibility
  • Standard and high-capacity configurations
  • Integration with Hendrickson suspension systems
  • Potential payload improvement
  • Reduced weight compared with traditional axle-and-suspension arrangements
  • Long structural warranty on qualifying configurations

Limitations or Considerations

  • Not a powered front drive axle
  • Specifications vary substantially among application families
  • Standard highway and fire-rescue versions are not directly interchangeable
  • Integrated air disc brake versions have a narrower capacity range
  • Maximum wheel cut depends on chassis and tire clearance
  • Replacement parts must match the exact axle assembly
  • Fabricated beams require manufacturer-approved repair procedures
  • Axle capacity does not override lower suspension, brake, wheel, tire, or frame ratings
  • Integrated suspension versions require compatible Hendrickson components
  • High-capacity versions can be significantly heavier than standard truck configurations
  • Vehicle-manufacturer approval is required for the complete installation
  • Improper alignment can cause rapid steer-tire wear

Driver and Operator Experience

A properly aligned STEERTEK NXT should provide controlled steering response and predictable tracking. The available wheel cut of up to 50 degrees improves maneuverability in loading areas, city streets, terminals, and vocational job sites.

Integrated suspension packages can improve ride quality compared with traditional multileaf suspension arrangements. The actual result depends on the springs, shocks, tires, vehicle loading, and chassis configuration.

Drivers should report pulling, steering wander, vibration, excessive effort, free play, or unusual tire wear. These symptoms can originate from the axle, suspension, steering gear, tires, wheels, or alignment.

Maintenance and Ownership Notes

Routine maintenance includes inspecting the axle beam, kingpins, bushings, bearings, steering knuckles, tie-rod ends, steering arms, wheel ends, brakes, and mounting components.

Steering pivot points must be inspected and lubricated at the interval specified for the vehicle. Some Hendrickson service information identifies a maximum lubrication interval of 25,000 miles for applicable configurations, while vocational applications may require more frequent service.

Only approved repair procedures and genuine or application-approved parts should be used. Welding, heating, straightening, or drilling a fabricated axle beam without authorization can weaken the structure.

Fasteners should be inspected with a calibrated torque wrench according to Hendrickson procedures.

Common Axle or Differential Problems

  • Kingpin bushing wear
  • Kingpin bearing wear
  • Damaged kingpin seals
  • Loose or worn tie-rod ends
  • Steering-knuckle movement
  • Wheel-bearing wear
  • Hub seal leakage
  • Brake pull
  • Uneven brake wear
  • Incorrect toe alignment
  • Excessive steer-tire wear
  • Steering wander
  • Excessive steering effort
  • Loose axle-clamp fasteners
  • Damaged suspension brackets
  • Cracked or dented axle beam
  • Restricted wheel cut caused by interference
  • Corrosion around steering joints and wheel ends

Because STEERTEK NXT is non-driven, differential and ring-and-pinion problems do not apply.

Identification Information

  • Manufacturer: Hendrickson
  • Product Family: STEERTEK NXT
  • Primary Identification Location: Etched or stamped information near the center front of the axle beam
  • Axle Part Number: Identifies the axle-beam features
  • Axle Assembly Number: Identifies the complete axle, including knuckles, brackets, and tie-rod components
  • Important Capacity Information: Nominal axle rating and vehicle-certified front GAWR
  • Important Dimensional Information: Kingpin intersection, spring centers, beam drop, ride height, and wheel cut
  • Important Brake Information: Integrated disc, bolt-on disc, or drum brake configuration
  • Vehicle Information: Manufacturer, model, year, VIN, and original build records

The complete identification information should be recorded before ordering kingpins, bushings, seals, knuckles, tie rods, steering arms, wheel ends, brakes, or an axle beam.

Buying Considerations

  • Required front axle rating
  • Standard or high-capacity STEERTEK NXT
  • Truck, bus, motorhome, or fire-rescue application
  • Vehicle make, model, year, and VIN
  • Axle part number
  • Axle assembly number
  • Kingpin intersection
  • Spring-center dimensions
  • Axle-beam drop
  • Suspension type and ride height
  • Maximum required wheel cut
  • Integrated or bolt-on brake knuckles
  • Air disc or drum brakes
  • Hub and wheel-end configuration
  • Wheel and tire size
  • Vehicle-manufacturer application approval
  • Availability of replacement parts
  • Condition of the beam, kingpins, bushings, knuckles, and tie rod
  • Evidence of impact damage, overloading, welding, or unauthorized repairs
  • Remaining warranty coverage

Variants and Configurations

  • Standard on-highway STEERTEK NXT
  • 2025 optimized STEERTEK NXT
  • Medium-duty STEERTEK NXT
  • Bus and motorhome STEERTEK NXT
  • Vocational STEERTEK NXT
  • High-capacity STEERTEK NXT
  • Fire and rescue STEERTEK NXT
  • Integrated air disc brake knuckles
  • Bolt-on air disc brake configurations
  • Drum brake configurations
  • AIRTEK NXT integrated air suspension
  • SOFTEK NXT integrated mechanical suspension
  • Different kingpin intersections
  • Different beam drops
  • Different ride heights
  • Different wheel-end packages
  • Vehicle-specific OEM configurations

Comparison to Similar Equipment

The STEERTEK NXT differs from conventional steer axles by using a fabricated box-section beam instead of a traditional forged I-beam.

The Meritor MFS Front Steer Axle is a conventional commercial steer-axle family available across medium- and heavy-duty applications.

The Dana Spicer E-Series Steer Axle provides forged steer-axle configurations from approximately 10,000 to 14,600 pounds.

The Dana Spicer D-Series Steer Axle covers medium-duty through heavy vocational applications.

The Detroit Front Steer Axle is offered across Freightliner and Western Star truck platforms.

The PACCAR FX-20 and FX-22 Front Axle is designed for heavy Kenworth and Peterbilt vocational applications.

Best Fit For

  • Fleets prioritizing lower front axle weight
  • On-highway trucks requiring up to a 14,600-pound steer axle
  • Medium-duty trucks
  • Bus and motorhome chassis
  • Trucks requiring tight maneuverability
  • Vehicles using integrated air disc brakes
  • Applications using Hendrickson AIRTEK NXT
  • Applications using Hendrickson SOFTEK NXT
  • Fire and rescue vehicles
  • Heavy vocational vehicles requiring up to 24,000-pound capacity
  • Fleets seeking integrated axle-and-suspension engineering
  • Operators with access to Hendrickson parts and service support

Related Truck Types

Related Truck Models

Related Axle and Differential Types

Related Equipment Systems

Related Guides

Regulatory and Compliance Notes

The axle, suspension, brakes, hubs, wheels, tires, steering system, and frame must support the vehicle’s required front gross axle weight rating.

Installing a higher-capacity STEERTEK NXT does not independently increase the vehicle’s certified weight rating. The complete vehicle must be approved by Hendrickson and the vehicle manufacturer.

Repairs to the fabricated axle beam must follow Hendrickson procedures. Unauthorized welding, heating, bending, or straightening can affect structural integrity.

Steering and brake components are safety-critical and should be inspected and repaired by qualified technicians.

Real World Operating Notes

The broad STEERTEK NXT family includes substantially different axles. A 13,200-pound highway axle should not be confused with a 24,000-pound fire-rescue assembly simply because both carry the STEERTEK NXT name.

The lightweight standard axle can provide additional payload or help offset the weight of emissions, safety, and driver-comfort equipment.

High-capacity versions are integrated with specialized suspensions and chassis. They cannot be treated as universal replacement axles for conventional highway trucks.

Frequently Asked Questions

What is the Hendrickson STEERTEK NXT?

It is a fabricated, non-driven front steer axle used in trucks, buses, motorhomes, vocational vehicles, and fire apparatus.

What capacities are available?

Medium-duty and bus configurations range from approximately 8,000 to 14,600 pounds. Specialized high-capacity versions extend from approximately 16,000 to 24,000 pounds.

Is STEERTEK NXT a powered front axle?

No. It supports and steers the front wheels but does not transmit engine torque.

What is the maximum wheel cut?

Hendrickson lists wheel cuts of up to 50 degrees. Actual wheel cut depends on the complete vehicle configuration.

Is the axle forged or fabricated?

STEERTEK NXT uses a fabricated box-section steel beam rather than a traditional forged I-beam.

What brakes are available?

Depending on the application, configurations include integrated air disc brakes, bolt-on disc brakes, and drum brakes.

What changed with the 2025 update?

Hendrickson states that the optimized design provides up to 25 pounds of additional weight savings compared with the previous generation.

Can it be paired with an air suspension?

Yes. AIRTEK NXT combines STEERTEK NXT with a compatible Hendrickson front air suspension.

What is SOFTEK NXT?

SOFTEK NXT is a lightweight integrated mechanical suspension and STEERTEK NXT axle system.

Does the axle have a differential?

No. A non-driven steer axle does not require a differential or final-drive gearing.

Can a standard STEERTEK NXT be replaced with a high-capacity version?

Not directly. The suspension, frame, brakes, wheels, tires, steering system, and vehicle certification must support the higher-capacity axle.

How is the axle identified?

Look for the etched or stamped part and assembly numbers near the center front of the axle beam and compare them with the vehicle’s build records.

Availability and Where to Find

Hendrickson STEERTEK NXT axles are available as original equipment on compatible commercial trucks, buses, motorhomes, and specialty vehicles.

Replacement axle assemblies and service components may be available through vehicle dealers, Hendrickson distributors, suspension specialists, and qualified commercial truck parts suppliers.

Used axles should be identified by the complete part number, assembly number, capacity, dimensions, suspension, brakes, wheel ends, and original vehicle application.

Current specifications and technical resources are available through the Hendrickson STEERTEK NXT product page.

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