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RGP 3,500 lb Trailer Idler Hub - 5 on 5" Bolt Pattern, 1/2" Studs, #84 Spindle


Regular price $29.89 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:

This 3.5K trailer idler hub provides a solid, cast steel replacement to rebuild or refresh your trailer’s spindle setup. Rated for 3,500 lb axles with a 5 on 5" bolt pattern, this heavy-duty hub comes with only the five 1/2" wheel studs pre-installed. It is designed as a bare hub replacement to fit standard #84 spindles.

What's Included by Kit Option: 

  • 1 x Cast Steel Idler Hub

Note: This is a bare hub only. Bearings, grease seals, dust caps are NOT included and must be sourced separately to complete your installation.

Specifications:

Axle Rating: 3,500 lbs (3.5K Axle)

Hub Capacity: 1,750 lbs

Bolt Pattern: 5 on 5"

Spindle Type: #84 Spindle

Wheel Size Matching: Accepts 12", 13", 14", and 15" rims

Inner/outer races: L68111/ L44610

Stud Size: 1/2"

Interchangeable & Brand Compatibility :

This idler hub is a direct replacement for 3,500 lbs axles from major brands including Dexter, AL-KO, Lippert, Rockwell, MAT and Besser Pro.

If your current hub uses any of the following part numbers, this kit will fit perfectly:

  • Dexter: 008-256-07, K08-256-91, 84550BX

  • MAT: 88-550

Fitment Note
Commonly used on Utility Trailers, Flatbeds, Cargo Haulers, Landscaping Trailers, and Campers. Always check your existing bearing numbers and seal dimensions before ordering to confirm fitment.

Payment & Security

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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

  • 5 stars: 4 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
E
Emilio Correa
Pieza Sólida

El cubo de 3,500 lb coincidió con el patrón de pernos y quedó muy bien instalado.

C
Cameron Russell
Happy With It

Good product for the money and exactly what my trailer needed.

C
Cesar Coronado
Buen Resultado

Buen producto por el precio, con construcción sólida y ajuste correcto.

E
Enrique Rojas
Good Performer

Solid 3,500 lb idler hub that matched the trailer setup and installed cleanly.

  • 5 stars: 4 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
E
Emilio Correa
Pieza Sólida

El cubo de 3,500 lb coincidió con el patrón de pernos y quedó muy bien instalado.

C
Cameron Russell
Happy With It

Good product for the money and exactly what my trailer needed.

C
Cesar Coronado
Buen Resultado

Buen producto por el precio, con construcción sólida y ajuste correcto.

E
Enrique Rojas
Good Performer

Solid 3,500 lb idler hub that matched the trailer setup and installed cleanly.