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RGP 10,000 lb Trailer Axle Electric Brake Assembly – 12-1/4" x 3-3/8", Self-Adjusting, 5-Bolt Flange, Rockwell Compatible


Regular price $125.89 USD
Shipping calculated at checkout.
Brake Configuration

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

Designed for 10,000 lb trailer axles, this electric brake assembly features a 12-1/4" x 3-3/8" brake size and a 5-hole mounting configuration for Rockwell-style axle applications. Available in left-hand and right-hand versions, it provides a direct replacement option for compatible Rockwell trailer braking systems.

Choose the correct brake position before ordering. The left-hand version cross-references Rockwell 4738-L, while the right-hand version cross-references Rockwell 4738-R. Always verify axle capacity, brake dimensions, mounting pattern, and brake position before installation.

Specifications

Axle Capacity: 10,000 lb

Brake Type: Electric Trailer Brake

Brake Size: 12-1/4" x 3-3/8"

Brake Flange: 5-Hole

Available Positions: Left Hand / Right Hand

Application: Rockwell Version

Adjustment Type: Self-Adjusting

What's Included

1 × Electric Trailer Brake Assembly in the selected position

OEM / Replacement Reference

Left Hand:
Rockwell 4738-L

Right Hand:
Rockwell 4738-R

Compatible with Rockwell-style 10,000 lb trailer axle applications using a 5-hole brake mounting configuration.

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