12" x 2" Electric Trailer Brake Assembly Pair – 5 Bolt – 5.2K–7K Axles
A clean, complete brake refresh for one axle. This pair includes one left-hand and one right-hand 12" x 2" electric backing plate assembly so you can service both sides together with less guesswork and more confidence.
Overview
This 12RVEB-1P pair is built for trailers using 12" x 2" electric drum brakes on a standard 5-bolt brake flange. You get one left-hand and one right-hand complete backing plate assembly for one axle, making this a smart choice for brake service when worn shoes, tired magnets, and old internal hardware are all due at the same time.
Product Video
Watch the brake assembly closer before you buy. This video gives you a clearer look at the one-pair configuration for single-axle brake service.
Need the 2-Pair Set Instead?
If you are servicing both axles on a tandem-axle trailer, the larger 4-plate version may be the better buy. It gives you two left-hand and two right-hand assemblies in one matched package so you can refresh the full trailer brake setup at the same time.
The related 2 Pair listing is the right move when one pair is not enough and you want the complete two-axle version of this same brake family.
R&P Service Insight
Brake wear usually does not happen in isolation. By the time shoes are worn down, the magnet and internal spring hardware are often at or near the same service point. That is why complete backing plate assemblies remain one of the most practical ways to refresh trailer braking on a working axle.
- One-Axle Service: This pair gives you the left and right side needed to service one axle correctly.
- Cleaner Repair Path: Replacing complete assemblies can be more straightforward than piecing together mixed old and new internals.
- Balanced Brake Work: Servicing both sides together helps support more even response across the axle.
R&P Knowledge Hub
Compatibility: Typically used on trailers with 5,200 lb, 6,000 lb, and 7,000 lb axles equipped with 12" x 2" electric drum brakes and a standard 5-bolt mounting flange.
Wheel / System Fit: This brake size is commonly associated with 14-1/2", 15", 16", and 16-1/2" wheel applications using standard hub-and-drum electric brake setups.
Installation Notes: Before ordering, verify brake dimensions, axle rating, flange pattern, wheel size, and trailer wiring condition. A correct 12" x 2" callout matters more than appearance alone.
Performance Insight: Electric brakes work by energizing the magnet through the brake controller, which engages the drum and activates the shoes through the internal lever system. Replacing the backing plate assembly restores the core wear items together.
R&P Repair Insight
Customers most often get tripped up on three things: ordering the wrong brake size, overlooking flange count, or forgetting that a proper one-axle set needs both a left-hand and a right-hand assembly. Confirm those three points first and the rest of the purchase becomes much easier.
- Check 1: Confirm the trailer uses 12" x 2" electric drum brakes.
- Check 2: Verify the axle has a standard 5-bolt brake flange.
- Check 3: Make sure you need one left-hand and one right-hand assembly for a single axle service.
Features
Complete Pair for One Axle
Includes one left-hand and one right-hand backing plate assembly so both sides of one axle can be serviced together.
12" x 2" Brake Size
Built for trailers using the common 12" diameter by 2" wide electric drum brake format found on many 5.2K to 7K axle applications.
Standard 5-Bolt Flange Fit
Designed around the standard 5-bolt mounting pattern used by many 12" x 2" electric brake axle setups.
Complete Backing Plate Assemblies
Includes the core brake components already assembled on the plates, including shoes, springs, magnet, and internal hardware.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 12RVEB-1P |
| Product Type | Electric trailer brake backing plate assembly pair |
| Brake Size | 12" diameter x 2" wide |
| Brake Type | Electric drum brake |
| Axle Class | 5,200 lb / 6,000 lb / 7,000 lb |
| Mounting Pattern | 5-bolt brake flange |
| Orientation | One right-hand and one left-hand assembly |
| Included Core Components | Shoes, springs, magnet, and internal hardware as part of the complete assemblies |
Fitment / Application
| Category | Details |
|---|---|
| Typical Axles | 5,200 lb, 6,000 lb, and 7,000 lb trailer axles using 12" x 2" electric drum brakes |
| Primary Fit | Standard 5-bolt brake flange applications |
| Common Wheel Sizes | 14-1/2", 15", 16", and 16-1/2" wheel applications commonly paired with this brake size |
| Primary Use Case | Brake service for one trailer axle where both left and right assemblies need replacement |
| Best Alternative | Need to service both axles? Use the linked 2-Pair listing instead. |
| Notes | Verify measurements, brake size, axle class, flange pattern, and overall compatibility before installation. |
Included Components
| Quantity | Item |
|---|---|
| 1 | Left-hand 12" x 2" electric brake backing plate assembly |
| 1 | Right-hand 12" x 2" electric brake backing plate assembly |
| Included in assemblies | Brake shoes |
| Included in assemblies | Brake springs |
| Included in assemblies | Brake magnets and internal assembly hardware |
