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True 8K HD Trailer Axle – 8000 lb Electric Brake – 8 Lug

08EBTRUEPA
Estimated delivery dates: Apr 6, 2025 - Apr 8, 2025

$1,199.00 $1,749.99 23% OFF

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High-Strength 8K Electric Brake Trailer Axle - 8000 lb Capacity, 8 Lug Hub/Drum with 9/16" Studs
True 8K HD Trailer Axle - 8000 lb Electric Brake - 8 Lug
$1,199.00 $1,749.99 23% OFF

Trailer Brakes FAQ

Downloadable Files

Downloadable Wiring Diagram

Yes, you can add brakes to your 2000 lb trailer axle!

To get started, you’ll want to ensure you have the proper components. Check out our selection for Trailer Axle Drums here: 2000 lb Hub and Drums.

You’ll also need the correct braking system for your setup. For that, we offer a variety of Trailer Brakes specifically designed for 2000 lb trailers. You can explore these options here: 2000 lb Trailer Brakes.

Together, these components will help ensure that your trailer axle is properly equipped and safe for use. Happy towing!

Answer:

• Electric Brakes: These are common and effective for trailers in this weight range. They provide proportional braking power based on the trailer’s load.

• Hydraulic Brakes: Found on some heavy-duty trailers, they offer consistent braking performance but require a hydraulic brake controller.

• Considerations: The choice depends on your trailer’s usage, compatibility with your towing vehicle, and local regulations. Check your manufacturer’s guidelines to ensure you choose the right type and capacity.

trailer wiring guide for AxleTek Genuine Brakes

Answer:

• Wiring Basics: Trailer brake wiring usually consists of a ground wire, a positive brake signal wire, and sometimes additional wires (such as for reverse lights).

• Secure Connections: Ensure connections are clean, corrosion-free, and secured with proper connectors (quick disconnects, spade connectors, etc.).

• Fuse Protection: Most systems include a fuse to protect against shorts.

• Reference Diagrams: Always consult the wiring diagram provided by your brake manufacturer, as wiring colors and configurations can differ between models.

• Testing: Once wired, test the trailer brakes with the vehicle stationary before hitting the road. If your brakes aren’t activating properly, recheck the connections and consult the manufacturer’s instructions.

Answer:

• Definition: Burnishing is the process of ‘seating in’ the brake shoes or pads by gradually building up friction material contact.

• Purpose: This helps ensure that the brakes engage smoothly and evenly over the entire surface, leading to improved performance and longer life.

• Process:

      • Initial Break-In: Lightly apply the brakes at low speeds in a controlled environment to generate minimal, consistent heat.

      • Multiple Cycles: Repeat braking gently several times to smooth out the contact surface.

      • Consequences of Skipping Burnishing: Without proper burnishing, you might experience uneven braking, reduced effectiveness, or premature brake wear.

Answer:

• Preparation:

• Verify you have the correct brake system for your trailer’s weight.

• Gather all tools and refer to the installation manual.

• Mounting the Brakes:

• Securely mount the brake assemblies (whether they are drum or disc brakes) to the trailer axle.

• Check that all hardware is tightened to the manufacturer’s specifications.

• Wiring:

• Run the wiring through the designated channels and secure them away from moving parts.

• Connect the wiring according to the wiring diagram.

• Adjustments:

• Adjust the brake shoes or pads for proper contact with the drum or rotor.

• Ensure there’s proper clearance as recommended in the instructions.

• Testing:

• After installation, test the brakes in a safe, controlled environment.

• Make any necessary fine-tuning adjustments for optimal performance.

Answer:

• Double-Check Wiring: Improper connections or a bad ground can lead to non-functioning brakes.

• Review Adjustments: Ensure the brake shoes/pads are adjusted correctly. Uneven contact may cause dragging or poor braking performance.

• Inspect Burnishing: Inadequate burnishing can result in a delay or inconsistency in brake engagement.

• Consult Documentation: Refer back to your manufacturer’s installation and troubleshooting guides for specific diagnostic tips.

• Professional Help: If you continue to have issues, consult a trailer brake specialist or mechanic for an in-depth inspection.

Yes, we do! We take quality and safety very seriously. Unlike some competitors (like Dexter Brakes), if your brake pads ever show signs of cracking, we stand by our product with a lifetime no crack warranty. This means that if you ever notice any cracks in your brake pads, we’ll replace them free of charge. Our commitment is to provide reliable, safe braking performance throughout the life of your trailer.

Answer:

Troubleshooting trailer brake issues can involve a few key steps. Here’s a simple guide to help you diagnose common problems:

1. Check the Wiring and Connections:

• Inspect All Wiring: Look for loose, frayed, or corroded wires. Ensure that connections (including the ground) are secure and clean.

• Verify the Fuses/Relays: Check that your trailer’s fuse and any brake relay are functioning correctly.

• Consult the Wiring Diagram: Refer to your brake manufacturer’s wiring diagram to ensure that each connection is correct.


2. Examine Brake Components and Adjustments:

• Inspect Brake Pads/Shoes: Look for wear, glazing, or uneven wear. Remember that cracked pads can trigger warranty claims if applicable.

• Check Brake Adjustments: Make sure the brake shoes or pads have the correct amount of clearance with the drum or rotor. Too much clearance can lead to delayed braking, while too little can cause dragging.

• Confirm Burnishing Process: If your brakes are new, verify that they were properly burned in. Inadequate burnishing can lead to inconsistent engagement.


3. Test the Brake Controller and Signals:

• Functionality Check: Ensure that the brake controller in your tow vehicle is calibrated and functioning as it should.

• Signal Verification: Use a multimeter to check that the proper voltage is reaching the trailer brakes when activated.


4. Look for Overheating or Binding:

• Overheating Signs: If the brakes feel ‘grabby’ or if you notice a burning smell during operation, the brakes may be overheating.

• Check for Binding: Ensure that the brakes engage and disengage smoothly. Binding or dragging can indicate issues with the adjustment or mechanical components.


5. Review Installation Details:

• Proper Mounting: Confirm that the brake assemblies and hardware are securely installed. Loose mounting can affect performance.

• Clearance and Alignment: Double-check that the hub face, wheel, and brake drum/rotor are properly aligned.


6. Consult Documentation and Support:

• Owner’s Manual: Revisit the installation and troubleshooting sections in your owner’s manual.

• Professional Assistance: If you’ve run through these steps and are still experiencing problems, consider consulting a trailer brake specialist or a professional mechanic.

Trailer Axles FAQ

Downloadable Files

Files that will help teach you or guide you in finding the measurements for your Trailer Axles. 

Trailer Axle Measurement Guide – TowParts.com

When working with trailer axles, a few key measurements are essential to ensure proper fitment and performance. Accurate measurements are crucial to avoid unnecessary wear, damage, or safety issues. Below, we’ll explain how to measure your axle with confidence.

Getting Started

To make the process easier, it’s best to remove your tires and wheels before taking measurements. This allows for more precise readings. If removing them isn’t possible, you can measure from the center of one tire to the center of the opposite tire. Having a friend assist by holding one end of the tape measure is helpful but not absolutely necessary.

Hub Face Measurement

What is it?

The hub face measurement is the distance from the outer face of one hub (where the wheel mounts) to the outer face of the opposite hub. This is the most important measurement when replacing or upgrading an axle.

How to measure:

1.Hook your tape measure to the outer face of one hub (the side facing the wheel).

2.Extend the tape measure across the axle to the outer face of the hub on the opposite side.

3.Be careful not to measure to the inside face of the hub—measure only to the outer face for accuracy.

Spring Center Measurement

What is it?

The spring center measurement is the distance between the centers of the leaf springs. This measurement is critical for proper axle placement and load distribution. If the springs are installed incorrectly, it can lead to bent axles and unsafe towing conditions.

How to measure:

1.Have a friend hold one end of the tape measure at the exact center of one spring.

2.Stretch the tape measure to the exact center of the opposite spring.

3.If you’re working alone, hook the tape measure on the outside edge of one spring and measure to the inside edge of the opposite spring. Subtract the width of the spring to determine the center-to-center distance.

Tips for Accurate Measurements

•Always double-check your measurements before ordering or installing a new axle.

•If you’re unsure or need help, reach out to our experts at TowParts.com for guidance.

•Use a high-quality tape measure with clear markings to avoid errors.

Pro Tip: Keep these measurements handy when contacting TowParts.com for axle replacements or upgrades. Our team is happy to assist you with any questions or concerns!

 

Trailer Axle and Hub Selection Guide – TowParts.com

Proper axle positioning and hub selection are essential for building or repairing your trailer. Here’s a detailed guide to help you make the right choices with confidence.

How to Purchase the Correct Trailer Hub or Drum

Selecting the right hub or drum is a critical step in repairing your trailer axle. Follow these simple steps to ensure you get the correct fit:

Step 1: Remove the Hub or Drum

Carefully remove the hub or drum from your trailer axle. This will allow you to measure and inspect the components for identification.

Step 2: Measure the Bolt Pattern

Determine your axle’s capacity by measuring the bolt pattern. This step is crucial if the capacity is unknown. Use a bolt pattern diagram to identify the correct measurements.

Helpful Tip: A 5-lug bolt pattern can sometimes be tricky. Use our bolt pattern guide for accurate results.

Step 3: Identify the Bearings and Seal

1.Remove the front and rear bearings and the seal from the hub.

2.Look for numbers stamped on the bearings. These numbers correspond to the spindle size.

3.If the numbers are not readable, measure the inside dimensions of the bearings and seal using calipers.

4.Refer to our bearing measurement guide for step-by-step instructions.

Step 4: Select the Best Hub or Drum for Your Needs

Once you have the measurements and information, choose the hub or drum that fits your requirements.

Need Help?

If you’re unsure, the TowParts.com team is here to assist! We’ll guide you through selecting the correct hub or drum to ensure a perfect fit for your trailer.

Why Choose TowParts.com?

•Expert Assistance: Our knowledgeable team is ready to help with your trailer needs.

•High-Quality Products: We offer durable, reliable parts built to last.

•Comprehensive Resources: Explore our website for diagrams, measurement guides, and installation tips.

For more information, contact us at 1 (888) HAUL 360 or visit TowParts.com. Let us help you get back on the road safely and efficiently!

Description

Product Overview

Introducing the ProAxles True 8K HD Trailer Axle—an ultra-durable, high-performance axle designed to handle heavy-duty loads with unmatched efficiency. Featuring 8000 lbs capacity, 12 1/4″ x 3 3/8″ electric brakes, and 8 lug hubs with 9/16″ studs, this axle is the perfect upgrade for trailers that demand superior strength and reliability. Engineered with a robust 3.5″ extra heavy steel tube, it ensures stability, durability, and a smooth ride on every journey.


Why Choose the 8K Heavy Duty (3.5″ Tube) Trailer Axle?

  • Upgraded Outer Bearing (02475): Enhances axle efficiency and longevity.
  • Larger Brakes (12 1/4″ x 3 3/8″): Provides increased braking power for safer stops.
  • Extra Heavy Axle Beam (3.5″ Tube): Optimized for handling heavier weights with ease.
  • Upgraded 9/16″ Studs: Allows for the use of 17.5″ tires and wheels.
  • Direct Replacement: Compatible with Dexter, Rockwell American, Lippert, Hayes, and AL-KO axles.

Key Features of our True 8K HD Trailer Axle – 8000 lb Electric Brake 8 Lug:

  • High-Capacity Design: 8000 lbs weight capacity, ideal for heavy-duty and medium-duty trailers.
  • Durable Construction: 3.5″ extra heavy steel tube provides exceptional stability and longevity.
  • Electric Brakes: Equipped with powerful 12 1/4″ x 3 3/8″ electric brakes for superior stopping power.
  • 8 Lug Hub/Drum Assembly: Features an 8 on 6.5″ bolt pattern with upgraded 9/16″ studs.
  • EZ Lube Design: Removable rubber plug on the hub cap provides easy access to the greaseable zerk fitting—grease your axle without removing the hub!
  • Fully Assembled & Ready to Install: Comes pre-assembled, saving you time and effort during installation.
  • Underslung Configuration: Spring seats welded on the bottom allow for a lower ride height, enhancing stability.

Specifications of our True 8K HD Trailer Axle – 8000 lb Electric Brake 8 Lug:

  • Weight Capacity: 8000 lbs
  • Axle Tube Diameter: 3.5″
  • Axle Type: Straight axle with underslung design
  • Bolt Pattern: 8 on 6.5″
  • Brake Assembly: 12 1/4″ x 3 3/8″ electric brakes
  • Hub/Drum Assembly: 8 lug with upgraded 9/16″ studs
  • Weight: Approximately 275 lbs
  • Note: This axle is not ABS compatible
  • Bearing Kit Includes:
    • Inner Bearing: 25580 (1.75″ I.D.)
    • Outer Bearing: 02475 (1.25″ I.D.)
    • Inner Race: 25520 (3.265″ O.D.)
    • Outer Race: 02420 (2.688″ O.D.)
    • Double Lip Grease Seal: 010-036-00 (3.376″ O.D., 2.250″ I.D.)
    • Hub Cap: Drive-in with rubber plug, 2.72″ O.D.

Features:

  • High-Strength Spindle Welds: Ensures durability and peace of mind during heavy-duty operations.
  • Upgraded Components: Enhanced bearings and brakes for improved efficiency and safety.
  • 9/16″ Studs: Accommodates larger 17.5″ tires and wheels for better load distribution.
  • Compatibility: Direct replacement for Dexter, Rockwell American, Lippert, Hayes, and AL-KO axles.
  • Versatile Applications: Suitable for utility trailers, car haulers, landscape trailers, flatbeds, livestock trailers, cargo trailers, enclosed trailers, RVs, dump trailers, lowboys, and more.
  • Ease of Maintenance: The EZ Lube design simplifies axle maintenance, reducing downtime and extending the life of your axle.
  • Underslung Design: Allows for a lower ride height, enhancing stability and ease of loading.

Why Choose ProAxles?

  • Lifetime Transferable Warranty on Spindle Welds: Confidence in our craftsmanship means peace of mind for you.
  • Superior Quality Assurance: Manufactured under stringent quality controls to meet and exceed industry standards.
  • Exceptional Traceability: Each axle is fully verified for accuracy in bearing adjustment on each wheel end, backed by extensive manufacturing expertise.
  • Ready to Install: Axles come fully assembled, saving you time and effort.

Application:

Designed for light to medium-duty trailers, the ProAxles True 8K HD Trailer Axle is built to handle demanding loads with ease. Whether you’re hauling equipment, vehicles, livestock, or large cargo, this axle provides the reliability and performance you need.


fast shipping 🚛

We offer fast shipping to the lower 48 states on all trailer axle purchases, delivering ProAxles’ unmatched quality right to your door.


Unmatched Quality and Performance

ProAxles stands out in the trailer axle industry by combining innovation with superior durability. Our True 8K HD Electric Brake Axle features 40% stronger spindle welds compared to other manufacturers, ensuring it can withstand the rigors of frequent use and heavy loads without compromising safety or performance. Investing in ProAxles means investing in an axle that is built to last.


Ease of Installation and Maintenance

The axle comes fully assembled, allowing for quick and hassle-free installation. The EZ Lube design means you can maintain your axle without the need to remove the entire hub, saving you time and effort.


Upgrade Your Trailer Today

Enhance your trailer’s performance and reliability with the ProAxles True 8K HD Trailer Axle. With its robust construction, advanced braking system, upgraded components, and industry-leading warranties, it’s the perfect choice for those who demand the best for their trailers.


Order Now and Get Back on the Road

Don’t let a worn-out axle slow you down. Order your new True 8K HD Electric Brake Trailer Axle today and experience the ProAxles difference. With fast shipping and a product that’s ready to install right out of the box, you’ll be back on the road in no time.


Need Replacement Parts?

We offer a full range of replacement parts compatible with this axle, ensuring long-term serviceability and support for your investment.

  • True 8K HD Trailer Axle Bearing Kit (2 sets):
    • Inner Bearing: 25580
    • Outer Bearing: 02475
    • Inner Race: 25520
    • Outer Race: 02420
    • Double Lip Grease Seal: 010-036-00
    • Hub Cap: Drive-in with rubber plug, 2.72″
  • 8K Hub/Drum Assemblies – 8 Lug with 9/16″ Studs
  • 12 1/4″ x 3 3/8″ Electric Brake Assemblies
  • 8K Axle Beam Replacement

Contact Us

For any questions or assistance with your purchase, feel free to contact our customer support team. We’re here to help you find the perfect fit for your trailer needs.


Experience the ProAxles Advantage

With over 200 years of combined axle manufacturing expertise, ProAxles delivers products that meet the highest standards of quality and performance. Choose ProAxles for unmatched durability, reliability, and peace of mind on every journey.

Additional information

Weight N/A
Dimensions N/A
Hubface / Spring Center: No selection

75/56 (5'0), 95/78 (6'10") + $100, Custom Hubface / Spring Center (+ 2 Weeks) + $200

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Additional information

Weight N/A
Dimensions N/A
Hubface / Spring Center: No selection

75/56 (5'0), 95/78 (6'10") + $100, Custom Hubface / Spring Center (+ 2 Weeks) + $200

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What You Need to Know When Ordering Your New Trailer Axle

How To Measure your Hub Face for Your Trailer Axle

The hub face measurement (also known as the axle track) is one of the most important measurements you’ll need to find when replacing your axle.

The hub face (where your axle contacts the wheel and tire) is measured from the outer edge of one hub face to the outer edge of the opposite hub face.

Missing your axle hub? Try measuring brake-flange-to-brake-flange instead.

 This method isn’t quite as accurate as the hub face measurement, but if your axle’s hubs are missing, you can use what’s called a brake flange measurement instead. Measure from the outside face of one brake flange to the outside face of the opposite brake flange.Most axles have a standard amount of space between the brake flanges and hubs, depending on the axle size. If you know what capacity your axle is and you know your brake flange measurement, just add the standard flange-to-hub dimension to your brake flange length to obtain your hub face measurement. So what’s the standard distance between brake flanges and hubs? it depends on the axle’s weight capacity. For instance, 3,500-lb axles generally have 3″ between each flange and hub. So if we add 6″ (3″ for each side) to our brake flange measurement, we get our hub face number. (See our chart below for the correct number of inches to add to your brake flange measurement.)

How To Find Your Spring Center Measurement

The spring center measurement might be the most important to get right. You want to make sure your new axle’s springs are located in the same place as the old ones so they don’t obstruct the wheels, tires, or other components on your trailer. While holding your tape measure in the center of your spring, measure to the center of the opposite spring. (You’ll use the same method regardless of whether your trailer’s springs are mounted above or below the axle.)

Tip: If you don’t have a friend nearby to hold the end of the tape measure, you can still get this measurement solo. By hooking your tape measure on the outside edge of one spring, you can then measure to the inside edge of the other spring. This measurement will be identical to a center-to-center measurement.

Other Identifying Axle Features

Axle Capacity / Tube Diameter

Choose a new axle with the same capacity as your current axle. You can usually find your capacity on a sticker or stamp on the axle (or sometimes on the trailer itself, if your axles came OEM). If you can’t find your capacity this way, you can narrow it down by measuring the tube diameter.

A Wheel Bolt/Lug Pattern

Your trailer’s wheel bolt pattern is another feature you can use to find the axle you need. Specific bolt patterns are commonly seen on specific axle sizes

How to Measure a Broken Trailer Axle

If your trailer has Multiple Axles

If your trailer axle has been through it and is bent or damaged in some way, you may not be able to use the traditional measurements. In this case, here are a few other options.

If your trailer has a Single Axle

If you’ve only got one axle to work with, you might still be able to find your hub face measurement, even if your axle doesn’t have brake flanges. If your axle has brake flanges, use the brake flange to brake flange measurement we discussed above. 

If your axle doesn’t have brake flanges, and one of your hubs is missing or your axle is broken from the outer edge of the leaf spring, you can use the method below to find your measurement. (You cannot use this method if your axle has broken anywhere between the two leaf springs.

This will prevent you from measuring accurately, leading to an incorrect hub face measurement.)

  • Measure the distance from the center of one leaf spring to the outside edge of the hub face(measurement A)
  • Double the value 
  • Add the value to your spring center measurement

How To Measure your Bolt Pattern

For Hubs and Drums with Even Number of Bolts

To measure between the holes on a wheel with an even number of holes, simply measure from the center of one bolt hole to the center of its opposite to determine the diameter of the lug pattern.

For Hubs and Drums with Odd Number of Bolts

Measuring the diameter of a bolt circle with an odd number of lugs isn’t as straightforward.

You can’t measure straight across because there is no opposite bolt hole.

However, there are a few ways to get around this and figure out the bolt pattern you need for your new wheel.

Option 1

Measure from Center to Edge

An easy way to determine bolt hole circle diameter on wheels with 5 bolt holes is to measure from the center of one bolt hole to the farthest edge of one of the two farthest holes.

Option 2

Measure to Imaginary Bolt Hole Center

Measure from the center of one bolt hole to a point on the rim where the bolt hole would be on an odd-lug wheel. You must guess where this point is located if you want to measure the diameter this way.

Option 3

Measure Adjacent Holes

You can also measure the center-to-center distance of adjacent holes. Then, compare the distance to those in the list below to find the circle diameter.

Distance:

2-5/8″ – The bolt pattern is 5 on 4-1/2
2-3/4″ – The bolt pattern is 5 on 4-3/4
3″ – The bolt pattern is 5 on 5
3-1/4″ – The bolt pattern is 5 on 5-1/2