3500 lb Idler Axle
common-axle-sizes
3,500 lb Idler Axles - Image 3
3,500 lb Idler Axles - Image 4
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3,500 lb Idler Axles

3,500 lb Idler Axle  — Pre-assembled with 5 on 4.5 bolt pattern hubs, bearings, seals, races, grease caps, and lug nuts for easy bolt-on installation and reliable performance. Choose your hub-face / spring-center (HF/SC) for a perfect fit. Free Shipping in the Lower 48 states.

Need wheels and tires, Click HERE

 

Price range: $325.00 through $400.00

3,500 lb Idler Axle (Single-Axle) — Rockwell American

Get your trailer rolling smoothly and reliably with this durable 3500 lb idler axle from Rockwell American (a Dexter company). Designed for precise fitment and smooth tracking on utility, cargo, landscape, and light-duty equipment trailers. Features high-tensile strength tube, powder-coated finish, and Posi-Lube spindles for easy maintenance. Free Shipping in the Lower 48 states.

Rockwell American trailer axles are made in the USA with a 2-year manufacturer’s warranty, ensuring consistent tolerances and structural integrity for reliable performance.

What’s Included in This 3,500 lb Idler Axle:

  • (1) 3,500 lb Idler Axle with Hubs: Pre-assembled with 5 on 4.5 bolt pattern hubs, bearings, seals, races, grease caps, and lug nuts for easy bolt-on installation and reliable performance.

*Verify hub face, spring center and hub pattern in the options above—selections may vary to match your trailer’s specs for a custom fit.

Choose Your Axle Size (HF/SC Measurements)

Select the exact hub-face (HF) and spring-center (SC) measurements to match your trailer’s frame width, hanger spacing, and tire/fender clearance—ensuring safe, stable towing and preventing issues like rubbing or misalignment.

Hub-Face (HF): Measured from the outer face of one hub to the outer face of the other (across the full axle length). Common hub-face sizes range from 61″ to 95″ for standard trailers.

Hubface and Spring Center Diagram

Spring-Center (SC): Measured from the center of one spring seat to the center of the other. This aligns with your trailer’s spring hanger brackets. Typically your spring center is 2″ less then your frame width.

Not sure which hub-face / spring-center (HF/SC) you need? Contact us—we’ll verify your measurements before you order. See our How to Measure a Trailer Axle guide or call (602) 292-9690.

Key Features and Specifications

  • Brand: Rockwell American (a Dexter company)—trusted quality with American-made durability.
  • Axle type: Idler (no brakes) — cambered axle beam improves stability and tire life; pre-welded brake flanges let you add electric brakes later.
  • Capacity: 3,500 lb GAWR for reliable performance on utility, cargo, and landscape trailers.
  • Posi-Lube® Spindles: Enable quick, clean bearing service with grease zerk for reduced maintenance time and continuous protection, ensuring long-term reliability on the road.
  • Powder-Coated Axle Tube: Provides superior corrosion resistance against weather and road salt, extending the life of your 3500 lb idler axle in tough conditions.
  • 5 on 4.5 (5×4.5) bolt pattern: Fits most 5-lug 13″–15″ trailer tire & wheel assemblies; confirm your bolt pattern before ordering.
  • Cambered axle tube: (2-3/8” OD) with underslung, pre-welded spring pads for stable tracking and a lower deck height.
  • Technical Components:
    • Spindle Size: #84 with grease zerk for standard 3,500 lb applications.
    • Hubs: #84545 for compatible wheel mounting.
    • Inner Bearing: L68149 (1.378″ ID)
    • Outer Bearing: L44649 (1.063″ ID)
    • Inner Race: L68111 (2.361″ OD)
    • Outer Race: L44610 (1.98″ OD)
    • Grease Seal: Part #10-19 (1.719″ x 2.565″)
    • Wheel Stud Size: 1/2″ for secure wheel attachment.

*Confirm bolt pattern and included components based on your selected options for a perfect match.

Documents & How-To Resources

Access these helpful guides and videos to install and maintain your 3,500 lb Idler Axle with confidence. Our resources cover everything from axle servicing to suspension setup for optimal trailer performance.

Frequently Asked Questions (FAQs)

Got questions about the 3500 lb Idler Axle? We’ve got answers to help you choose and install with confidence.

How do I measure hub-face (HF) and spring-center (SC)?

Measure HF from the outer face of one hub to the outer face of the other. Measure SC from the center of one welded spring seat to the center of the other. Match both to your trailer’s hanger spacing and frame width for optimal tire/fender clearance and safe towing. See our How to Measure a Trailer Axle guide for diagrams and tips.

Will this axle fit my wheels?

This axle uses a 5 on 4.5 bolt pattern, common for many trailer wheels. Check your wheel’s bolt pattern (measure lug hole spacing) and center bore to confirm compatibility. Fits most 5 lug 13-15″ trailer wheels. If unsure, contact us with your specs for verification.

Do you have installation videos?

Yes—watch step-by-step installs, measurement tips, and maintenance guides on our YouTube channel. Search for “trailer axle installation” or check the video below for a quick overview.

Installation Video

Watch this quick video tutorial on installing a similar trailer axle—get tips on measurements, assembly, and common pitfalls to avoid for a smooth setup.

 

Questions? We’re Here to Help with Your Trailer Axle Setup

Have questions about the 3,500 lb Idler Axle? Our experts can confirm your HF/SC measurements, bolt pattern compatibility, and even source custom sizes if needed. Get personalized advice to ensure a perfect fit for your trailer—reach out today for fast, friendly support.

Call (602) 292-9690, email sales@johnsontrailerparts.com, or use our Contact page.

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Key Features and Specifications

  • Brand: Rockwell American (a Dexter company)—trusted quality with American-made durability.
  • Axle type: Idler (no brakes) — cambered axle beam improves stability and tire life; pre-welded brake flanges let you add electric brakes later.
  • Capacity: 3,500 lb GAWR for reliable performance on utility, cargo, and landscape trailers.
  • Posi-Lube® Spindles: Enable quick, clean bearing service with grease zerk for reduced maintenance time and continuous protection, ensuring long-term reliability on the road.
  • Powder-Coated Axle Tube: Provides superior corrosion resistance against weather and road salt, extending the life of your 3500 lb idler axle in tough conditions.
  • 5 on 4.5 (5×4.5) bolt pattern: Fits most 5-lug 13″–15″ trailer tire & wheel assemblies; confirm your bolt pattern before ordering.
  • Cambered axle tube: (2-3/8” OD) with underslung, pre-welded spring pads for stable tracking and a lower deck height.
  • Technical Components:
    • Spindle Size: #84 with grease zerk for standard 3,500 lb applications.
    • Hubs: #84545 for compatible wheel mounting.
    • Inner Bearing: L68149 (1.378″ ID)
    • Outer Bearing: L44649 (1.063″ ID)
    • Inner Race: L68111 (2.361″ OD)
    • Outer Race: L44610 (1.98″ OD)
    • Grease Seal: Part #10-19 (1.719″ x 2.565″)
    • Wheel Stud Size: 1/2″ for secure wheel attachment.

*Confirm bolt pattern and included components based on your selected options for a perfect match.

Documents & How-To Resources

Access these helpful guides and videos to install and maintain your 3,500 lb Idler Axle with confidence. Our resources cover everything from axle servicing to suspension setup for optimal trailer performance.

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