8000 lb Trailer Axle Kit – 2 Electric Brake Axles, Springs & U-Bolts – 16K Capacity

8000 lb Trailer Axle Kit – 2 Electric Brake Axles, Springs & U-Bolts – 16K Capacity Capacity

Product Description

Build or upgrade your heavy-duty tandem-axle trailer with a robust axle and suspension package designed for demanding hauling applications.

The 8000 lb Tandem Trailer Axle Kit includes two 8,000 lb electric brake axles, providing a combined axle rating of up to 16,000 lbs. Both axles are equipped with electric drum brake assemblies, providing braking capability at all four wheel positions when properly connected to a compatible trailer brake controller and electrical system.

The kit also includes four heavy-duty 6-leaf slipper springs and two U-bolt kits, providing the primary axle and suspension components for compatible tandem-axle trailer installations.

Heavy-duty steel axle construction, greaseable spindle components, internal brake wiring, and an underslung spring-seat configuration make this kit well suited for dump trailers, equipment trailers, gooseneck trailers, flatbeds, and other heavy-duty tandem-axle applications.

Key Features

• 8,000 lb Rated Capacity Per Axle

• Up to 16,000 lb Combined Axle Rating

• 2 × Electric Brake Axles

• Electric brakes on both axles

• 8 × 6.5" Bolt Pattern

• Includes 4 × 6-Leaf Slipper Springs

• Includes 2 × U-Bolt Kits

• Heavy-duty steel axle construction

• Greaseable spindle design

• Internal electric brake wiring

• Underslung spring-seat configuration

• Multiple Hub Face / Spring Center sizes available

• Designed for heavy-duty tandem-axle trailer applications

What's Included

Trailer Axles

• 2 × 8,000 lb Electric Brake Axles

Both axles are equipped with electric drum brake assemblies.

When properly connected to a compatible trailer brake controller and electrical system, braking is provided at all four wheel positions.

Leaf Springs

• 4 × Heavy-Duty 6-Leaf Slipper Springs

The slipper-style spring design is commonly used in higher-capacity tandem trailer suspension systems where increased durability and load support are required.

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

• Hanger Brackets

• Suspension Mounting Hardware

• Other Hanger Components

These components must be purchased separately if required for your trailer 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 between the two wheel-mounting surfaces of the axle.

Spring Center

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

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

Dual Electric Brake Axle Configuration

This tandem axle kit includes:

2 × 8,000 lb Electric Brake Axles

Both axles are equipped with electric drum brakes.

When properly connected to a compatible brake controller and trailer electrical system, the dual-brake configuration provides braking capability at all four wheel positions.

This makes the kit suitable for demanding heavy-duty trailer applications where increased load support and braking capability are required.

16,000 lb Combined Axle Rating

Each axle is rated for:

8,000 lbs

Two 8K axles provide a combined axle rating of up to:

16,000 lbs

Actual trailer capacity depends on the complete trailer configuration and the rating of the lowest-capacity component, including:

• Trailer Frame

• Suspension

• Leaf Springs

• Wheels

• Tires

• Coupler

• Braking System

• Other Installed Components

The axle rating alone does not determine the GVWR of the complete trailer.

6-Leaf Slipper Springs

The kit includes:

4 × Heavy-Duty 6-Leaf Slipper Springs

The slipper-style spring design is commonly used in higher-capacity trailer suspension systems.

Compared with lighter-duty spring configurations, the 6-leaf construction is designed for demanding applications requiring increased durability and load support.

Greaseable Spindle Design

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

Accessible grease fittings help simplify regular wheel-bearing service and make routine axle maintenance easier.

Regular bearing inspection and lubrication are recommended as part of normal trailer maintenance.

Internal Brake Wiring

Brake wiring is routed inside the axle tube for a cleaner and more protected installation.

Internal wiring helps protect the electrical wiring from:

• Road Debris

• Abrasion

• External Wear

• Accidental Damage

This configuration also provides a cleaner electrical installation between the brake assemblies.

Underslung Spring Configuration

The spring seats are positioned below the axle tube.

This is known as an underslung spring configuration.

Mounting the springs below the axle can help maintain a lower trailer deck and ride height compared with overslung configurations where the springs are positioned above the axle.

Applications

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

• Dump Trailers

• Equipment Trailers

• Flatbed Trailers

• Heavy-Duty Car Haulers

• Gooseneck Trailers

• Livestock Trailers

• Enclosed Trailers

• Lowboy Trailers

• Heavy-Duty Utility Trailers

• Other Compatible Tandem-Axle Trailer Applications

Frequently Asked Questions

Q1: What is included in this 8K tandem axle kit?

The kit includes:

• 2 × 8,000 lb Electric Brake Axles

• 4 × 6-Leaf Slipper Springs

• 2 × U-Bolt Kits

Tandem hanger and suspension mounting components are not included.

Q2: Do both axles have electric brakes?

Yes.

This kit includes:

2 × Electric Brake Axles

Both 8,000 lb axles are equipped with electric drum brake assemblies.

When properly connected to a compatible brake controller and electrical system, braking is provided at all four wheel positions.

Q3: What is the total axle capacity?

Each axle is rated for:

8,000 lbs

The two axles provide a combined axle rating of up to:

16,000 lbs

Actual trailer capacity depends on the ratings of the trailer frame, suspension, springs, wheels, tires, coupler, and all other components used in the complete trailer.

Q4: What bolt pattern does this axle kit use?

The axles use an:

8 × 6.5" Bolt Pattern

Please verify your wheel bolt pattern before ordering.

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

Available configurations include:

• 95" Hub Face / 80" Spring Center

• 97" Hub Face / 80" Spring Center

Please measure your existing axle or trailer 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 measurements should be verified before ordering to ensure proper axle fitment.

Q7: What type of leaf springs are included?

The kit includes:

4 × Heavy-Duty 6-Leaf Slipper Springs

The slipper-style spring design is commonly used in higher-capacity tandem trailer suspension systems.

Q8: Are U-bolt kits included?

Yes.

The package includes:

2 × U-Bolt Kits

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

Q9: Is the tandem suspension hanger kit included?

No.

The kit does not include:

• Tandem Hanger Kit

• Equalizers

• Hanger Brackets

• Other Suspension Mounting Hardware

These components must be purchased separately if required.

Q10: Are the spring seats mounted above or below the axle?

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

Q11: Does the axle have internal brake wiring?

Yes.

Brake wiring is routed through the axle tube for a cleaner installation and additional protection from abrasion, debris, and external damage.

Q12: What trailers can this axle kit be used on?

This kit is suitable for many compatible heavy-duty tandem-axle trailers, including:

• Dump Trailers

• Equipment Trailers

• Flatbed Trailers

• Heavy-Duty Car Haulers

• Gooseneck Trailers

• Livestock Trailers

• Enclosed Trailers

• Lowboy Trailers

• Heavy-Duty Utility Trailers

Always verify axle dimensions, suspension configuration, wheel compatibility, braking requirements, and overall trailer capacity before ordering.

Installation Notes

Before installation, verify:

• Correct Hub Face measurement

• Correct Spring Center measurement

• 8 × 6.5" wheel bolt pattern

• Trailer suspension configuration

• Slipper spring compatibility

• Hanger and equalizer compatibility

• Wheel and tire capacity

• Brake controller compatibility

• Brake wiring

• Trailer frame capacity

• Suspension capacity

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