6000 lb Trailer Axle Kit – 1 Brake Axle + 1 Idler Axle, Springs & U-Bolts – 12K Capacity

6000 lb Trailer Axle Kit – 1 Brake Axle + 1 Idler Axle, Springs & U-Bolts – 12K Capacity

Product Description

Build or upgrade your tandem-axle trailer with a heavy-duty axle package designed for dependable performance in demanding trailer applications.

The 6000 lb Tandem Trailer Axle Kit combines one 6,000 lb electric drum brake axle and one 6,000 lb idler axle, providing a combined axle rating of up to 12,000 lbs. The kit also includes four 5-leaf double-eye springs and two U-bolt kits, giving you the primary axle and suspension components needed for a compatible tandem-axle setup.

The axle assemblies feature durable steel axle tubes, an underslung spring-seat configuration, greaseable spindle components, and protected internal brake wiring for dependable trailer service and easier routine maintenance.

Available in multiple Hub Face / Spring Center configurations for different trailer applications.

Key Features

• 6,000 lb Rated Capacity Per Axle

• Up to 12,000 lb Combined Axle Rating

• 1 × Electric Drum Brake Axle

• 1 × Idler Axle

• 6 × 5.5" Bolt Pattern

• Includes 4 × 5-Leaf Double-Eye Springs

• Includes 2 × U-Bolt Kits

• Heavy-duty steel axle tube construction

• Greaseable spindle design

• Internal electric brake wiring

• Underslung spring-seat configuration

• Multiple Hub Face / Spring Center sizes available

• Suitable for compatible tandem-axle trailer applications

What's Included

Trailer Axles

• 1 × 6,000 lb Electric Drum Brake Axle

• 1 × 6,000 lb Idler Axle

The electric brake axle provides trailer braking capability when properly connected to a compatible trailer brake controller and electrical system.

The idler axle provides the second load-carrying axle without electric brake assemblies.

Leaf Springs

• 4 × 5-Leaf Double-Eye Springs

The double-eye spring design is intended for compatible tandem-axle suspension systems.

U-Bolt Kits

• 2 × U-Bolt Kits

The included U-bolt hardware is used to secure the axle assemblies to the leaf springs.

Important Product Note

Tandem Suspension Hanger Kit is NOT Included

This kit does not include:

• Tandem Hanger Kit

• Equalizers

• Shackles

• Hanger Brackets

• Other Suspension Mounting Hardware

These components must be purchased separately if required for your installation.

Technical Specifications

Available Hub Face / Spring Center Sizes

Choose the correct axle dimensions for your trailer before ordering.

Hub Face

Hub Face is the distance from one wheel-mounting surface to the opposite wheel-mounting surface.

Spring Center

Spring Center is the distance between the centerlines of the two spring seats.

Always measure your existing axle or trailer carefully before choosing a size.

1 Brake + 1 Idler Configuration

This tandem axle kit includes:

1 × Electric Drum Brake Axle + 1 × Idler Axle

The electric brake axle provides braking capability when properly connected to a compatible brake controller, while the idler axle provides additional load-carrying capacity without brake assemblies.

This combination provides a practical setup for compatible tandem-axle trailer builds and replacement applications.

12,000 lb Combined Axle Rating

Each axle is rated for:

6,000 lbs

Two 6K axles provide a combined axle rating of up to:

12,000 lbs

Actual trailer capacity is determined by the lowest-rated component in the complete trailer system, including the frame, suspension, springs, wheels, tires, coupler, and other installed components.

5-Leaf Double-Eye Springs

The kit includes:

4 × 5-Leaf Double-Eye Springs

The double-eye configuration provides an eye at each end of the spring for use with compatible hanger, equalizer, shackle, and suspension components.

Greaseable Spindle Design

The axle assemblies feature greaseable spindle components, providing convenient access for routine bearing lubrication and maintenance.

Accessible grease fittings help simplify regular bearing service without requiring complete hub disassembly.

Internal Brake Wiring

The electric brake axle features internal brake wiring routed through the axle tube.

This provides a cleaner installation and helps protect the brake wiring from external wear, debris, and accidental damage.

Underslung Spring Configuration

The spring seats are positioned below the axle tube.

This underslung configuration can help maintain a lower trailer deck and ride height compared with configurations where the springs are positioned above the axle.

Applications

Suitable for many compatible medium-duty tandem-axle trailers, including:

• Utility Trailers

• Cargo Trailers

• Equipment Trailers

• Car Haulers

• Boat Trailers

• ATV Trailers

• Lawn & Landscape Trailers

• Flatbed Trailers

• Livestock Trailers

• Enclosed Trailers

• Dump Trailers

• Lowboy Trailers

• Other Compatible Tandem-Axle Trailer Applications

Frequently Asked Questions

Q1: What is included in this 6K tandem axle kit?

The kit includes:

• 1 × 6,000 lb Electric Drum Brake Axle

• 1 × 6,000 lb Idler Axle

• 4 × 5-Leaf Double-Eye Springs

• 2 × U-Bolt Kits

Tandem suspension hanger components are not included.

Q2: Are both axles equipped with electric brakes?

No.

This kit includes:

1 Electric Brake Axle + 1 Idler Axle

Only one axle is equipped with electric drum brake assemblies.

Q3: What is the total axle capacity?

Each axle is rated for 6,000 lbs, providing a combined axle rating of up to 12,000 lbs.

Actual trailer capacity depends on the ratings of all components used in the complete trailer system.

Q4: What bolt pattern does this axle kit use?

The axle assemblies use a:

6 × 5.5" Bolt Pattern

Please verify your wheel bolt pattern before ordering.

Q5: What Hub Face / Spring Center sizes are available?

Available configurations include:

• 89" Hub Face / 74" Spring Center

• 95" Hub Face / 80" Spring Center

Please measure your trailer or existing axle carefully before selecting a size.

Q6: What does Hub Face / Spring Center mean?

Hub Face is the distance between the two wheel-mounting surfaces.

Spring Center is the distance between the centerlines of the two spring seats.

Both dimensions should be verified before purchasing a replacement axle.

Q7: Are leaf springs and U-bolt kits included?

Yes.

The kit includes:

• 4 × 5-Leaf Double-Eye Springs

• 2 × U-Bolt Kits

Q8: Is the tandem suspension hanger kit included?

No.

The kit does not include:

• Equalizers

• Shackles

• Hanger Brackets

• Tandem Hanger Kit

• Other Suspension Mounting Hardware

These components must be purchased separately if needed.

Q9: Are the spring seats mounted above or below the axle?

The spring seats use an underslung configuration, meaning they are positioned below the axle tube.

Q10: Does the electric brake axle have internal wiring?

Yes.

The brake wiring is routed through the axle tube to provide a cleaner installation and additional protection from external wear and damage.

Q11: What trailers can this axle kit be used on?

The kit may be suitable for compatible tandem-axle applications including:

• Utility Trailers

• Cargo Trailers

• Equipment Trailers

• Car Haulers

• Boat Trailers

• Flatbed Trailers

• Livestock Trailers

• Enclosed Trailers

• Dump Trailers

• Lowboy Trailers

Always verify axle dimensions, suspension compatibility, wheel bolt pattern, wheel and tire ratings, and complete trailer capacity before ordering.

Installation Notes

Before installation, verify:

• Correct Hub Face measurement

• Correct Spring Center measurement

• 6 × 5.5" wheel bolt pattern

• Trailer suspension configuration

• Spring and hanger compatibility

• Wheel and tire capacity

• Brake controller compatibility

• Brake wiring

• Trailer frame and suspension capacity

Professional installation is recommended for trailer axle replacement or new trailer builds.