Hybrid Brake Drum - 12" x 2" - 8 on 6.5" - 9/16" Studs - 8K Bearing Size
Hybrid 12" x 2" brake drum for many trailer applications using Lippert L347627-style hybrid axle setups, combining standard 12" x 2" brake compatibility with larger 8,000 lb bearing-capacity components.
Overview
This 12" x 2" hybrid brake drum fits many trailers using Lippert L347627-style hybrid axles, including Kaufman, Sure-Trac, and similar trailer models when the measurements match. It is designed to work with standard 12" x 2" brake assemblies while using larger bearings associated with 8,000 lb bearing-capacity setups.
R&P Service Insight
Hybrid drums require closer verification than a standard 6K or 7K drum because the brake size and bearing package do not always follow the same axle-rating category.
- Brake Size: Confirm your trailer uses 12" x 2" electric brake assemblies.
- Bearing Package: Verify 25580 inner bearing and 02475 outer bearing before ordering.
- Wheel Fit: Match the 8 on 6.5" bolt pattern, 9/16" studs, and 4.75" pilot diameter.
R&P Knowledge Hub
Compatibility: Common replacement reference for Lippert L347627 hybrid brake drum applications.
Vehicle / System Fit: Used on many trailers with hybrid axle setups, including Kaufman, Sure-Trac, and similar models where dimensions match.
Installation Notes: Bearings, oil seal, oil cap, plug, O-ring, and lug nuts are not included unless otherwise stated.
Performance Insight: This hybrid setup allows standard 12" x 2" brake compatibility while using larger 8K-capacity bearing components.
Brand & Fitment Note
Selling Brand: R&P Carriages
Application Reference: Common replacement reference for Lippert part L347627 hybrid brake drum applications.
What This Means: This listing is for one hybrid brake drum only. Bearing and cap components must be matched to your existing axle setup.
Before Ordering: Verify brake size, pilot diameter, wheel stud size, bolt pattern, bearing numbers, and seal dimensions before installation.
R&P Repair Insight
When replacing a hybrid brake drum, do not rely on axle rating alone. A trailer may use 12" x 2" brakes while still requiring the larger bearing combination associated with this 8K hybrid drum.
- Check the Old Drum: Confirm the original drum cross-reference or casting/application details when available.
- Check the Bearings: Match 25580 inner and 02475 outer bearing requirements.
- Check the Seal: Confirm the 3.38" x 2.25" oil seal requirement before reassembly.
Features
Hybrid Drum Configuration
Designed for trailers using 12" x 2" brakes with larger 8,000 lb bearing-capacity components.
8 Lug Wheel Pattern
Uses an 8 on 6.5" bolt circle with 9/16" wheel studs and a 4.75" pilot diameter.
Lippert Reference Fit
Commonly used as a replacement reference for Lippert L347627 hybrid brake drum applications.
Trailer Application
Fits many hybrid axle trailer setups found on Kaufman, Sure-Trac, and similar trailers when measurements match.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 99-865-916HD |
| Listing SKU | 99-865-916HD |
| Selling Brand | R&P Carriages |
| Reference Part | Lippert L347627 |
| Product Type | Hybrid brake drum |
| Quantity Included | 1 brake drum |
| Application | Hybrid axle trailer brake drum applications |
| Axle Rating Reference | 8,000 lb bearing size |
| Key Measurement | 12" x 2" drum size |
| Material / Finish | Black Cast Iron |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Trailer hybrid axle brake drum systems |
| Primary Fit | Lippert L347627-style hybrid drum applications |
| Secondary Fit / Common Uses | Many Kaufman, Sure-Trac, and similar trailer models using matching hybrid axle dimensions |
| Notes | Confirm brake size, pilot diameter, bearing numbers, seal size, bolt pattern, and stud size before ordering. |
Detailed Measurements
| Key Dimension | Measurement |
|---|---|
| Drum Size | 12" x 2" |
| Stud Size | 9/16" |
| Bolt Pattern | 8 on 6.5" |
| Pilot Diameter | 4.75" |
| Inner Bearing Requirement | 25580 - 1.75" - not included |
| Outer Bearing Requirement | 02475 - 1.25" - not included |
| Oil Seal Requirement | 3.38" x 2.25" - not included |
| Oil Cap Reference | 277223 or K71-038-00 - not included |
Included Components
| Quantity | Item |
|---|---|
| 1 | 12" x 2" hybrid brake drum - SKU 99-865-916HD |
| Not Included | Inner bearing 25580, outer bearing 02475, oil seal 3.38" x 2.25", oil cap / plug / O-ring set 277223 or K71-038-00, and 8 lug nuts for 9/16" studs |
Uses - Not Included
| Component | Reference / Measurement |
|---|---|
| Inner Bearing | 25580 - 1.75" |
| Outer Bearing | 02475 - 1.25" |
| Oil Seal | 3.38" x 2.25" |
| Oil Cap / Plug / O-Ring Set | 277223 or K71-038-00 |
| Lug Nuts | 8 lug nuts for 9/16" studs |
