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RGP 12,000 lb Trailer Axle Hub & Drum Assembly, 8 on 6.5" Bolt Pattern, 12-1/4" x 5", Fits Dexter 12K Axles


Regular price $329.89 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:

The RGP 12K Trailer Hub & Drum Assembly is designed as a replacement for 12,000 lb heavy-duty trailer axles and fits compatible Dexter 12K axle applications.

This assembly combines an 8 on 6.5" hub with a 12-1/4" x 5" brake drum. The hub features a 4-3/4" pilot and 5/8" wheel studs, while the drum is compatible with 5" electric and hydraulic brake assemblies.

Commonly used on heavy-duty flatbed trailers, equipment trailers, and dual tandem trailers.

Key Specifications:

  • Axle Capacity: 12,000 lbs
  • Hub Capacity: 6,000 lbs
  • Bolt Pattern: 8 on 6.5"
  • Hub Pilot: 4-3/4"
  • Wheel Stud Size: 5/8"
  • Brake Drum Diameter: 12-1/4"
  • Brake Drum Width: 5"
  • Brake Compatibility: 5" Electric & Hydraulic
  • Wheel Size: 16" and 17.5"
  • Compatible Inner Bearing: 3984 — 2.625" ID (sold separtely)
  • Compatible Outer Bearing: 28682 — 2.25" ID (sold separtely)

What's Included by Kit Option: 

1 × Hub & Drum Assembly

  • (1) RGP 12K Trailer Idler Hub
  • (1) 12-1/4" x 5" Heavy-Duty Brake Drum
  • 5/8" Wheel Studs installed

OEM Replacement Part Numbers: 

Hub: Compatible With Dexter 8-214-8, 008-214-08, 8-214-08

Drum: Compatible With Dexter 009-028-01

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  • 5 stars: 2 (50%)
  • 4 stars: 2 (50%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
W
William Wright
Good Performance

Solid fit and construction for smooth, dependable trailer performance.

B
Brian Thomas
Strong Build

Good quality component that made the trailer work better.

E
Enrique Castillo
Nice Quality

Installation was straightforward and everything fit securely.

P
Pedro Rodriguez
Buena Calidad

Funciona perfectamente y parece bastante duradera.