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RGP 6,000 lb Trailer Axles Hub Kit, 6 on 5-1/2" Bolt Pattern, 1/2" Studs, 2.25" Seal, #42 spindles


Regular price $52.67 USD
Shipping calculated at checkout.

Care information

To ensure optimal performance and extend the service life of your new trailer components, please follow these care guidelines after purchase:

  • Before installation, check all parts for shipping damage or missing components. Do not install damaged parts.
  • Always use correct tools and torque settings. Improper installation can lead to premature wear or failure.
  • For bearings, suspensions, and brake components, apply high-quality trailer grease before first use if not pre-greased.
  • Some parts (like brake assemblies) require a short break-in period to achieve full performance. Follow manufacturer instructions for best results.
  • Recheck fasteners, grease levels, and moving components after 100 miles of towing, then at regular intervals.
  • After exposure to water, road salt, or mud, clean and dry parts thoroughly. Apply anti-rust treatment if needed.
  • If storing unused parts, keep them in a dry, sealed container away from moisture and direct sunlight.

Delivery and Shipping

Handling Time: Orders ship out within 1 business day after payment is received.

Shipping Methods: We use trusted carriers like UPS, FedEx, or USPS based on package size and destination.

Delivery Time: Estimated delivery within 2–6 business days (U.S. domestic orders).

Tracking: A tracking number will be provided once your order is dispatched.

This brake assembly fits most standard 7,000 lb trailer axles that use 12" × 2" electric brakes with a 5-bolt mounting flange. Please verify your axle rating and brake dimensions before ordering. If you're unsure, send us your axle tag or hub information and we'll help confirm compatibility.
Yes. It is compatible with many standard Dexter, Lippert, Rockwell American, AL-KO, and other 7,000 lb trailer axles that use a standard 12" × 2" brake assembly. Always verify your axle specifications before purchasing.
Yes. This is a self-adjusting electric brake assembly, which automatically maintains proper brake shoe clearance during normal operation. This reduces maintenance and helps provide consistent braking performance.

Product Overview: 

The Running Gear Parts Hub kit is a durable replacement hub designed for 6,000 lb trailer axles with a #42 spindles. It features a 6 on 5-1/2" bolt pattern and a 3,500 lb hub capacity, making it suitable for many utility, flatbed, equipment, car hauler, camper, cattle, and horse trailers. 

The hub comes with the races and 1/2" wheel studs already pressed in for easier assembly. It is compatible with several common trailer axle brands, including Dexter, AL-KO, Lippert, Rockwell, and Besser Pro.

Key Features: 

Designed for 6,000 lb trailer axles. 

3,500 lb hub capacity

6 on 5-1/2" bolt pattern

Fits #42 spindle

Works with 15" and 16" wheels

Durable steel construction

1/2“ wheel studs are pre-installed

Bearings and races are pressed in and ready for assembly

EZ-Lube grease cap

Compatible with Dexter 008-213-9 and K08-213-90

Compatible with Dexter, AL-KO, Lippert, Rockwell, and Besser Pro trailer axles. 

What's Included by Kit Option: 

1 x Idler Hub

1 x Inner Bearing - 25580

1 x Outer Bearing - 15123

1 x Inner Race - 25520

1 x Outer Race - 15245

1 x 2.25" Grease Seal

1 x EZ-lube Grease Cap

6 x 1/2" Wheel Studs (pre-installed)

6 x Lug Nuts

Specifications: 

Brand: Running Gear Parts

Product Type: Trailer Idler Hub Assembly

Axle Capacity: 6,000 lbs

Hub Capacity: 3,500 lbs

Bolt Pattern: 6 on 5-1/2“ 

Spindle: #42

Wheel Size: 15" or 16"

Inner Bearing: 25580 (1.75" ID)

Outer Bearing: 15123 (1.25" ID)

Inner Race: 25520 

Outer Race: 15245

Grease Seal: #42 (2.25" ID, 3.376" OD)

Grease Cap: EZ Lube  

Wheel Stud Size: 1/2" 

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