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3500 lb idler hub with a 5 on 4.5 inch bolt pattern.
Pre-assembled 3500 lb idler hub ready for installation.
QAI and CSA certified 3500 lb idler hub for trailers.
High-quality trailer axle hub for 3500 lb capacity.
how to measure

3500 lb Idler Hub, 5 on 4.5 Inch Bolt Pattern

17-110
Estimated delivery dates: Apr 6, 2025 - Apr 8, 2025

$30.99 $119.98 48% OFF

Add to Cart
3500 lb idler hub with a 5 on 4.5 inch bolt pattern.
3500 lb Idler Hub, 5 on 4.5 Inch Bolt Pattern
$30.99 $119.98 48% OFF

Trailer Axle Hub and Drum FAQ

Downloadable Files

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

4, 6, 8 Bolt Pattern
5 Bolt Pattern (option 1)
5 Bolt Pattern (option 2)
Printable Bolt Pattern Finder

Answer:

•Identify the Bolt Count: Start by counting the number of bolt holes (e.g., 4, 5, 6, or 8).

•Measure the Pitch Circle Diameter (PCD):

For even bolt patterns, measure from the center of one bolt directly across to the opposite bolt.

For odd-number patterns, measure from the. center of one, skip one, to the center outside of the third.

• Check Consistency: Double-check your measurements to ensure that your wheel or drum will fit properly.

• Visual Inspection: Look for cracks, rust, or uneven wear on the hub face and drum.

• Feel for Vibration or Wobbling: When driving, any noticeable vibrations or misalignment can indicate that the hub or drum is warped or worn.

• Regular Inspection: Check the hub and drum at least once per season or before heavy towing. Look for signs of wear, rust, or damage.

• Cleaning: Keep the surfaces clean to remove any dirt or corrosion that could affect fitting and performance.

• Lubrication: Apply grease where recommended to reduce friction and prevent rust, following the manufacturer’s guidance.

• Professional Servicing: If you notice misalignment or significant wear, consult a trailer specialist to resurface or replace the components.

• Improper Fitment: A wrong bolt pattern or hub face measurement can result in wheels or brake drums not fitting securely.

• Poor Performance: Misalignment may lead to vibrations, increased tire wear, or even brake issues.

• Safety Risks: Ultimately, incorrect measurements can compromise the trailer’s handling and increase the risk of accidents during towing.

• Corrective Action: If you discover issues, it’s important to re-measure, adjust, or consult a professional for repairs or replacement to ensure a safe setup.

Description

3500 lb Idler Hub, 5 on 4.5 Inch Bolt Pattern – SKU: 17-110

Sturdy 3500 lb idler hub for flatbed trailers and beyond.
Pre-greased and ready to install on your trailer’s axle system.

The 3500 lb idler hub is designed for use on trailer axles and fits 3,500-lb axles with #84 spindles. This robust hub includes all necessary components such as bearings (L68149), races, grease seal, grease cap, and lug nuts, ensuring a hassle-free installation process.

Features

  • Fits idler axles on 3500 lb trailer axles with #84 spindles
  • Bearings (L68149 and L44649), races, seal, grease cap, and lug nuts included
  • Sturdy iron construction with zinc-enriched paint finish for durability
  • Pre-greased idler hub is easy to install – no need to pack bearings
  • Lithium complex, multipurpose grease keeps bearings lubricated
  • Certified by QAI and CSA

Specifications

Application: 3,500-lb trailer axles with #84 spindles

Compatible with: Standard axles from most manufacturers, including Dexter, Lippert (LCI), and AL-KO

  • Wheel size: 13″ to 15″
  • Bolt pattern: 5 on 4-1/2 inch
  • Wheel stud dimensions: 1/2 inch diameter x 1-5/16 inches long
  • Grease cap flange diameter: 1.988 inches

Weight capacity: 1,750 lbs

Limited warranty: 1 year

Bearing and Race Information

Component Description Diameter (in)
Bearings:
  • Inner bearing: L68149
  • Outer bearing: L44649
 – (1.378″ inner diameter)

(1.063″ inner diameter)
Races:
  • Inner race: L68111
  • Outer race: L44610
 –
Grease Seal: Inner diameter: 1.719″

Outer diameter: 2.565″

 –

Determining the Bolt Pattern

  • Bolt Pattern – Even: Measure from the center of one bolt hole to the center of the hole directly across from it.
  • Bolt Pattern – Odd: Measure from the center of any bolt hole to the point halfway between the two bolt holes directly across from the first.

Maintenance Tips and Replacements

Symptoms that indicate your idler hub may need replacement include unusual noises, excessive play in the wheel, or signs of wear on the bearings. Regular maintenance can help extend the life of your hub:

  • Inspect the grease cap and seal for any signs of damage or wear.
  • Check that all bolts are securely tightened to the manufacturer’s specifications.
  • Regularly apply fresh grease through the grease fitting, as needed, to ensure proper lubrication.

Certifications:

The 3500 lb idler hub is ideal for various trailer types including flatbeds, utility trailers, and boat trailers. Its robust construction ensures reliable performance while the pre-greased design simplifies installation.

Compare to Dexter 84545BX

  • The KH-545-07-19 AxleTek Trailer Idler Hub Assembly is equivalent to the Dexter 84545BX in terms of fit and function.

 

Additional information

Weight 8.8 lbs
Dimensions 8 × 7 × 5 in
Quantity: No selection

One 3.5K Idler Hub, 5×4.5, Two 3.5K Idler Hub, 5×4.5

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Additional information

Weight 8.8 lbs
Dimensions 8 × 7 × 5 in
Quantity: No selection

One 3.5K Idler Hub, 5×4.5, Two 3.5K Idler Hub, 5×4.5

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What you need to know before ordering

Simple Instructions for Measuring a Trailer Hub and Drum Bolt Pattern and Other Considerations Before Purchasing a Replacement

Part 1: Measuring the Bolt Pattern

Understanding your trailer’s bolt pattern is crucial when selecting a replacement hub and drum. Here’s how to measure it:

Step 1: Identify the Number of Lug Holes

• Count the Lug Holes: Determine how many bolt holes (lugs) are on your hub or wheel. Common configurations are 4, 5, 6, or 8 lug holes.

Step 2: Measure the Bolt Circle Diameter (BCD)

The method to measure the bolt circle diameter varies depending on whether you have an even or odd number of lugs.

For Hubs with an Even Number of Lugs (4, 6, 8 lugs):

1. Measure Across the Center:

• Place a ruler or measuring tape over the center of the hub.

• Measure from the center of one lug hole directly across the hub to the center of the opposite lug hole.

2. Record the Measurement:

• This distance is your bolt circle diameter.

Example: If the distance between opposite lug holes is 4 inches, your bolt pattern is “4 on 4” (4 lugs on a 4-inch circle).

For Hubs with an Odd Number of Lugs (5 lugs):

1. Measure from Center to Outer Edge:

• Measure from the center of one lug hole to the outer edge of a lug hole that is directly across from it (skipping one lug hole in between).

2. Alternatively, Use the Chord Measurement Method:

• Measure the Distance (D) between two adjacent lug holes (center to center).

• Use a Multiplier: Multiply this distance by 1.7012 to calculate the bolt circle diameter.

text{Bolt Circle Diameter (BCD)} = D times 1.7012

3. Record the Measurement:

• Round to the nearest common bolt pattern size (e.g., 4.5 inches, 5 inches).

Example: If the distance between adjacent lug holes is 2.75 inches:

text{BCD} = 2.75” times 1.7012 approx 4.68”

This approximates a 5 on 4.5” bolt pattern.

Step 3: Determine the Bolt Pattern Notation

• Express the Bolt Pattern: Use the format “[Number of Lugs] on [Bolt Circle Diameter]”.

Examples:

• “4 on 4” means 4 lugs on a 4-inch circle.

• “5 on 4.5” means 5 lugs on a 4.5-inch circle.

Part 2: Other Important Considerations Before Purchasing a Replacement Hub and Drum

To ensure safety and compatibility, consider the following factors before buying a replacement hub and drum:

1. Axle Capacity

• Know Your Axle Rating: Check your trailer’s axle weight capacity (e.g., 2,000 lbs, 3,500 lbs).

• Match the Hub and Drum: Purchase a hub and drum assembly rated for the same capacity.

2. Spindle Type and Bearing Sizes

• Identify Spindle Type: Determine if you have a straight or tapered spindle.

• Check Bearing Numbers:

• Remove the hub to access the bearings.

• Look for part numbers stamped on the bearings (e.g., L44649, L68149).

• Measure Bearings if Needed:

• Inner Bearing ID: Diameter of the inner bearing opening.

• Outer Bearing ID: Diameter of the outer bearing opening.

• Ensure Compatibility: The new hub must accommodate the same bearing sizes.

3. Grease Seal Size

• Check Seal Numbers: Look for part numbers on the grease seal.

• Measure if Unmarked:

• Inner Diameter (ID): Diameter where the seal fits over the spindle.

• Outer Diameter (OD): Diameter where the seal fits into the hub.

• Match Seal Size: The new grease seal must match these dimensions to prevent leaks.

4. Brake Type and Compatibility

• Determine Hub Type Needed:

• Idler Hub: For trailers without brakes.

• Hub and Drum Assembly: For trailers with drum brakes.

• Brake Size Compatibility:

• Ensure the drum matches your brake assemblies (common sizes are 7”, 10”, 12”).

• Check Brake Hardware:

• Verify that the hub is compatible with your existing brake components.

5. Wheel Compatibility

• Confirm Bolt Pattern: Ensure the new hub’s bolt pattern matches your wheel.

• Check Wheel Stud Size:

• Common stud sizes are 1/2”-20 or 9/16”-18 threads.

• Center Bore and Offset:

• Make sure the hub’s center bore fits your wheel.

• Consider wheel offset if applicable.

6. Spindle Type: EZ-Lube vs. Standard

• Identify Spindle Type:

• EZ-Lube Spindle: Has a grease fitting on the end for easy lubrication.

• Standard Spindle: Requires manual greasing.

• Select Compatible Components:

• Choose hubs and dust caps designed for your spindle type.

7. Material and Finish

• Environmental Considerations:

• For marine or coastal use, consider galvanized or stainless steel hubs to resist corrosion.

• Durability:

• Quality materials extend the life of your hub and drum.

8. Tools and Supplies Needed

• Essential Tools:

• Wrenches or sockets for lug nuts and spindle nuts.

• Torque wrench for proper tightening.

• Pliers or cutters for cotter pins.

• Supplies:

• High-temperature wheel bearing grease (if not pre-greased).

• Grease gun (for EZ-Lube spindles).

• Safety equipment (gloves, eye protection).

9. Installation Tips

• Proper Torque:

• Follow manufacturer specifications for tightening lug nuts and spindle nuts.

• Safety Checks:

• After installation, check for proper wheel rotation and absence of play.

• Regular Maintenance:

• Periodically inspect and grease bearings to extend the life of your hubs.

10. Consult Manufacturer Specifications

• Owner’s Manual:

• Review your trailer’s manual for specific requirements.

• Professional Advice:

• If unsure, consult with a trailer technician or dealer.

By carefully measuring your bolt pattern and considering these factors, you’ll ensure that you purchase the correct replacement hub and drum for your trailer, leading to safe and reliable performance on the road.