7000 lb Trailer Axle Kit – 2 Electric Brake Axles, Springs & U-Bolts – 14K Capacity

7000 lb Trailer Axle Kit – 2 Electric Brake Axles, Springs & U-Bolts – 14K Capacity

Product Description

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

The 7000 lb Tandem Trailer Axle Kit includes two 7,000 lb electric brake axles, providing a combined axle rating of up to 14,000 lbs. Unlike brake-and-idler combinations, 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 wiring system.

The kit also includes four heavy-duty 5-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 a practical solution for dump trailers, equipment trailers, flatbeds, car haulers, and other medium- to heavy-duty tandem-axle applications.

Key Features

• 7,000 lb Capacity Per Axle

• Up to 14,000 lb Combined Axle Rating

• 2 × Electric Brake Axles

• Electric brakes on both axles

• 8 × 6.5" Bolt Pattern

• Includes 4 × 5-Leaf Slipper 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

• Designed for medium- and heavy-duty tandem-axle trailer applications

What's Included

Trailer Axles

• 2 × 7,000 lb Electric Brake Axles

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.

Leaf Springs

• 4 × 5-Leaf Slipper Springs

The heavy-duty slipper-style spring design is commonly used in higher-capacity tandem-axle suspension systems where durability and dependable load support are important.

U-Bolt Kits

• 2 × U-Bolt Kits

The included U-bolt hardware is used to secure the axle assemblies to the slipper 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 parts 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 before selecting a size.

Dual Electric Brake Axle Configuration

This tandem axle kit includes:

2 × 7,000 lb Electric Brake Axles

Unlike configurations that combine one brake axle with one idler axle, this kit provides electric braking on both axles.

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

This configuration is especially suitable for heavier trailer applications where increased braking performance is required.

14,000 lb Combined Axle Rating

Each axle is rated for:

7,000 lbs

Two 7K axles provide a combined axle rating of up to:

14,000 lbs

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

• Trailer Frame

• Suspension

• Springs

• Wheels

• Tires

• Coupler

• Braking System

• Other Installed Components

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

5-Leaf Slipper Springs

The kit includes:

4 × Heavy-Duty 5-Leaf Slipper Springs

Slipper springs use a fixed eye at one end and a slipper-style end at the opposite end.

This spring configuration is commonly used on higher-capacity tandem trailer suspensions because of its durable and practical construction.

Greaseable Spindle Design

The axle assemblies feature greaseable spindle components to simplify routine bearing lubrication and maintenance.

Accessible grease points allow easier servicing of the wheel bearings as part of regular trailer maintenance.

Regular inspection and lubrication are recommended to help maintain reliable axle performance.

Internal Brake Wiring

The electric brake wiring is routed inside the axle tube.

This provides a cleaner installation while helping protect the wiring from:

• Road Debris

• Abrasion

• External Wear

• Accidental Damage

The internal wiring design also simplifies electrical routing between the brake assemblies.

Underslung Spring Configuration

The spring seats are positioned below the axle tube.

This is known as an underslung 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 medium- and heavy-duty tandem-axle trailers, including:

• Dump Trailers

• Equipment Trailers

• Flatbed Trailers

• Car Haulers

• Utility Trailers

• Cargo Trailers

• Livestock Trailers

• Enclosed Trailers

• Lowboy Trailers

• Landscape Trailers

• Other Compatible Tandem-Axle Trailer Applications

Frequently Asked Questions

Q1: What is included in this 7K tandem axle kit?

The kit includes:

• 2 × 7,000 lb Electric Brake Axles

• 4 × 5-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 7,000 lb 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.

Q3: What is the total axle capacity?

Each axle is rated for 7,000 lbs.

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

14,000 lbs

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

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:

• 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 must be verified to ensure proper axle fitment.

Q7: What type of leaf springs are included?

The kit includes:

4 × Heavy-Duty 5-Leaf Slipper Springs

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

Q8: Are U-bolt kits included?

Yes.

The kit includes:

2 × U-Bolt Kits

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

Q9: Is the tandem suspension hanger kit included?

No.

The kit does not include:

• Tandem Hanger Kit

• Equalizers

• Hanger Brackets

• Suspension Mounting Hardware

• Other hanger components

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 they are positioned below the axle tube.

Q11: Does the axle have internal brake wiring?

Yes.

The electric brake wiring is routed through the axle tube to provide a cleaner installation and help protect the wiring from external wear, debris, and damage.

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

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

• Dump Trailers

• Equipment Trailers

• Flatbed Trailers

• Car Haulers

• Utility Trailers

• Cargo Trailers

• Livestock Trailers

• Enclosed Trailers

• Lowboy Trailers

• Landscape Trailers

Always verify axle dimensions, wheel compatibility, suspension configuration, 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.