5,200 lb Electric Brake Axle Running Gear Kit

5,200 lb Electric Brake Axle Running Gear Kit (Single-Axle) — Rockwell American

Get your trailer stopping safely and reliably with this complete 5,200 lb electric brake axle running gear kit from Rockwell American (a Dexter company). Designed for precise fitment and smooth tracking on utility, cargo, landscape, and medium-duty equipment trailers.

Includes the axle, hubs, double-eye leaf springs, U-bolt kit, and single axle hanger kit for a full setup. Features high-tensile strength tube, powder-coated finish, Posi-Lube spindles, and 12″ x 2″ electric brakes for enhanced safety. 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 5,200 lb Electric Brake Axle Running Gear Kit:

• (1) 5,200 lb Electric Brake Axle with Hubs: Pre-assembled with 6 on 5.5 bolt pattern hubs, bearings, seals, races, grease caps, lug nuts, and 12″ x 2″ electric brakes for easy bolt-on installation and reliable stopping power.
• (2) Double-Eye Leaf Springs: Rated at 2,600 lbs each (5,200 lbs total), 25.25″ Eye to Eye, Made from high-strength steel for smooth ride and load support—perfect for utility or cargo trailers.
• (1) U-Bolt Kit: Fits round 3″ axles, 3″ x 7″ x 0.5625″–18; includes tie plates, washers, and nuts for secure spring mounting and vibration resistance.
• (1) Tall Single Axle Hanger Kit: Includes hangers to mount the springs securely to your trailer frame, ensuring proper alignment and stability.

*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.

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: Electric brake with a straight cambered beam design for added stopping power and safety on highways.
• Capacity: 5,200 lb GAWR (Gross Axle Weight Rating) 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 5200 lb axle in tough conditions.
• 6 on 5.5 (6×5.5) bolt pattern: Fits most 6-lug trailer tire & wheel assemblies; confirm your bolt pattern before ordering.
• Cambered axle tube: (3” OD) with underslung, pre-welded spring pads for stable tracking and a lower deck height.
• Technical Components:
  • Spindle Size: #42 with grease zerk for standard 5,200 lb applications.
  • Brake Drum: #8-201-05 Drum with 1/2″ wheel studs for compatible wheel mounting.
  • Backing Plates: # 23-105 LH 12″ x 2″ electric brake, # 23-106 RH 12″ x 2″ electric brake
  • Inner Bearing: 25580 (1.750″ ID)
  • Outer Bearing: LM67048 (1.250″ ID)
  • Inner Race: 25520 (3.265″ OD)
  • Outer Race: LM67010 (2.328″ OD)
  • Grease Seal: Part #10-10 (2.125″ ID x 3.376″ OD)
  • Wheel Stud Size: 1/2″

*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.

Documents & How-To Resources

Access these helpful guides and videos to install and maintain your 5,200 lb Electric Brake Axle Running Gear Kit with confidence. Our resources cover everything from axle servicing to brake setup for optimal trailer performance.

Operation & Service Manual — Rockwell American Trailer Axles (PDF): Step-by-step instructions for maintenance, lubrication, and troubleshooting your Rockwell American axle.

Trailer Suspension Diagram & Hanger Kit Spacing (Image): Visual reference for single and tandem axle hanger spacing with double-eye springs—perfect for ensuring proper alignment during installation.

Johnson Trailer Parts — YouTube How-To Videos: Watch our tutorial videos on trailer assembly, axle replacement, and brake installation for kits like this one.

Frequently Asked Questions (FAQs)

Got questions about the 5,200 lb Electric Brake Axle Running Gear Kit? We’ve got answers to help you choose and install with confidence.

Installation Video

Watch this quick video tutorial on installing a similar trailer axle running gear kit—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 5,200 lb Electric Brake Axle Running Gear Kit? 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.