Complete 3500# Trailer Brake Kit | 5x4.5 Bolt Pattern | Self-Adjusting
A comprehensive kit designed to add electric brakes to a single 3500# axle. Features self-adjusting backing plates and 10" drums with a 5-on-4.5" bolt pattern.
Overview
This R&P Carriages curated kit provides everything needed to add braking power to a single 3500# trailer axle. Specifically engineered for standard 3500# axle tubes (approx. 2-3/8" OD), this kit includes self-adjusting backing plates which automatically maintain the correct shoe-to-drum clearance, ensuring consistent stopping power and reduced maintenance. It is an ideal aftermarket solution for Spring or Torsion axles, including EZ Lube and standard spindles.
R&P Service Insight
Adding brakes to a single-axle trailer or a second axle on a tandem setup significantly improves towing safety and law compliance.
- Self-Adjusting: Eliminates the need for manual brake spoon adjustments.
- Universal Fit: Compatible with Dexter, AL-KO, AXIS, and Quality 3500# axles.
- All-In-One: Includes bearings, seals, and hardware to prevent mid-job trips to the parts store.
R&P Knowledge Hub
Compatibility: Fits most 3500# axles with a 4-bolt brake flange (2-7/8" center-to-center measurement).
Vehicle / System Fit: Designed for trailers with 5-bolt wheels on a 4.5" diameter bolt circle.
Installation Notes: Your axle must have a square brake flange welded behind the spindle with 4 mounting holes to accept the backing plates.
Performance Insight: 10" x 2.25" brakes provide the standard braking force required for 3500# G.V.W.R. applications.
R&P Repair Insight: Measurement Guide
Before ordering, please verify your axle dimensions to ensure this kit matches your configuration:
- Axle Tube: Should be approximately 2-1/4" to 2-3/8" OD. (Small 2000# axles are 1-5/8"; Large 5200#+ axles are 2-3/4").
- Bolt Pattern: 5 x 4.5" is the standard for 3500# axles (measures 4.5" from center of one stud to the back of the third stud).
- Flange: Verify the 4-hole square plate is present on your axle tube.
Features
Self-Adjusting Design
Brakes automatically adjust to the proper clearance during forward travel, ensuring peak performance.
Complete Hub Assembly
Drums come with bearing races pre-pressed for a faster, cleaner installation process.
EZ Lube Compatible
Includes EZ Lube dust caps, allowing for easy greasing without removing the hub.
Full Hardware Kit
Includes all necessary 7/16" mounting nuts and 1/2-20 lug nuts for the wheels.
Specifications
| Specification | Detail |
|---|---|
| Axle Rating | 3500 lbs. |
| Brake Size | 10" x 2.25" |
| Bolt Pattern | 5 on 4.5" |
| Brake Type | Electric Self-Adjusting |
| Flange Pattern | 4-Bolt (2-7/8" Spacing) |
| Stud Size | 1/2"-20 |
| Axle Tube Compatibility | 2-3/8" OD |
Fitment / Application
| Category | Details |
|---|---|
| Axle Brands | Dexter, AL-KO, AXIS, Quality, Lippert |
| Axle Types | Spring or Torsion |
| Spindle Style | Standard or EZ Lube |
| Notes | Does not fit 2000# axles (1-5/8" tube) or 5200#+ axles (2.75" tube). |
Included Components (One Axle Kit)
| Quantity | Item |
|---|---|
| 2 | 10" x 2.25" Backing Plates (1 Left, 1 Right) - Self-Adjusting |
| 2 | 10" Brake Drums (5 on 4.5") with Pressed Races |
| 2 | L44649 Outer Bearings |
| 2 | L68149 Inner Bearings |
| 2 | 1.7" 10-19 Grease Seals |
| 2 | EZ Lube Dust Caps |
| 10 | 1/2-20 Matching Lug Nuts |
| 8 | 7/16" Backing Plate Mounting Nuts |
