7K - 8K Hybrid Trailer Hub Drum 8x6.5 5/8 Studs Kit - Grease Seal
Heavy-duty 12" x 2" hybrid trailer hub drum kit with 8 on 6.5" bolt pattern, 5/8" studs, larger bearing package, grease seal, oil cap, center plug, O-ring, and lug nuts included. Comparable to Lippert Hybrid L347627.
Overview
This 99-865-58HD-G-KIT hybrid hub drum kit is built around a 99-865-58HD hybrid hub drum for heavy-duty trailer axle applications using a 12" x 2" drum, 8 on 6.5" bolt circle, 5/8" wheel studs, and the larger bearing set commonly used on 7K–8K hybrid axle setups. It is commonly used as a replacement reference for Lippert Hybrid L347627-style applications found on many Kaufman, Sure-Trac, and other trailers equipped with matching LCI / Lippert hybrid axle configurations.
R&P Service Insight
Hybrid hub drums are all about matching the spindle, bearing journals, brake size, bolt pattern, and pilot correctly before installation.
- Bearing Package: Includes 25580 inner bearing and 2475 outer bearing for matching spindle applications.
- Brake Compatibility: Designed for matching 12" x 2" brake applications commonly used in heavy-duty trailer hub drum systems.
- Wheel Fit: Verify 8 on 6.5" bolt circle, 5/8"-18 lug hardware, and 4.75" pilot before ordering.
R&P Knowledge Hub
Compatibility: Replacement reference for Lippert Hybrid L347627-style hub drum applications where the bearing set, seal, drum size, stud size, bolt pattern, and pilot match.
Vehicle / System Fit: Commonly used on Kaufman, Sure-Trac, and other heavy-duty trailer applications using matching LCI / Lippert hybrid axle hub drum setups.
Installation Notes: Confirm bearing numbers, grease seal size, cap thread, lug nut thread, wheel pilot, brake size, and drum configuration before installation.
Performance Insight: This hybrid setup pairs a 12" x 2" brake drum format with a larger heavy-duty bearing package for matching axle applications.
Brand & Fitment Note
Selling Brand: R&P Carriages replacement hub drum kit.
Application Reference: Lippert Hybrid L347627, LCI / Lippert, Dexter, Kaufman, and Sure-Trac names are used as compatibility, axle system, or application references only where the measurements, bearing package, brake size, and configuration match.
What This Means: This listing includes one hub drum with bearing set, grease seal, oil cap, O-ring, center plug, and eight 5/8"-18 flange lug nuts.
Before Ordering: Confirm your existing drum size, bearing numbers, seal size, wheel bolt pattern, pilot hole, stud size, cap thread, and brake assembly size before purchasing.
R&P Repair Insight
When replacing a hybrid hub drum, the most important checks are the spindle journal diameters, bearing numbers, brake diameter, bolt pattern, stud size, cap style, and seal dimensions. A drum may share the same wheel pattern but still be incorrect if the bearings, seal, cap, or studs do not match your axle and wheel setup.
- Check Bearing Numbers: Inner bearing 25580 and outer bearing 2475 should match your existing setup.
- Check Seal Size: This kit includes a 2.25" x 3.38" grease seal, part number 10-225.
- Check Cap & Plug: This kit includes Dexter-style 21-35 oil cap, 010-045-00 O-ring, and 046-032-00 center oil plug.
Features
Hybrid Bearing Package
Includes 25580 inner bearing and 2475 outer bearing for matching heavy-duty hybrid hub drum spindle applications.
12" x 2" Brake Drum Format
Built around a 12" x 2" hub drum configuration for compatible heavy-duty trailer brake systems.
5/8" Wheel Stud Hardware
Uses 5/8" wheel studs with an 8 lug, 6.5" bolt circle and includes eight 5/8"-18 flange lug nuts.
Complete BOM-Based Kit
Includes hub drum, bearings, grease seal, oil cap, O-ring, center plug, and lug nuts according to the kit bill of materials.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 99-865-58HD-G-KIT |
| Listing SKU | 99-865-58HD-G-KIT |
| Brand | R&P Carriages replacement kit |
| Product Type | Hybrid trailer hub drum kit |
| Quantity Included | One complete hub drum kit |
| Application | 7K–8K hybrid axle hub drum replacement applications where specifications match |
| Material / Finish | Machined trailer hub drum; finish may vary |
| Key Measurement | 12" x 2" drum, 8 on 6.5" bolt circle, 4.75" pilot |
| Stud / Lug Hardware | 5/8" studs; includes eight 5/8"-18 flange lug nuts |
| Cap Style | 2.875"-12 Dexter-style oil cap with O-ring and center oil plug |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Heavy-duty trailer axle hub drum system |
| Primary Fit | Lippert Hybrid L347627-style replacement applications where all dimensions match |
| Secondary Fit / Common Uses | Kaufman, Sure-Trac, and other trailers using matching LCI / Lippert hybrid axle setups |
| Notes | Works with matching 12" x 2" brakes and matching hybrid spindle bearing journals. Verify all measurements before ordering. |
Detailed Measurements
| Key Dimension | Measurement |
|---|---|
| Drum Size | 12" x 2" |
| Bolt Pattern | 8 lug, 6.5" bolt circle |
| Wheel Stud Size | 5/8" studs; includes 5/8"-18 flange lug nuts |
| Pilot Hole | 4.75" |
| Inner Bearing | 25580 bearing, 1.75" ID; fits 25520 race / 12" drum / big hub applications |
| Outer Bearing | 2475 bearing, 1.25" ID; fits 02420 race / 7200 lb and 8000 lb axle applications |
| Grease Seal | 10-225 grease seal, 2.25" x 3.38" |
| Oil Cap | 21-35 oil cap, Dexter 2.875"-12, 6K–8K and Pre-89 9K reference |
| O-Ring | 010-045-00 O-ring, 2.609" ID x .139" |
| Center Plug | 046-032-00 oil plug for center hole in oil cap |
Included Components
| Quantity | Item |
|---|---|
| 8 | 006-058-00: 5/8"-18 flange wheel lug nuts |
| 1 | 010-045-00: O-ring, 2.609" ID x .139" |
| 1 | 046-032-00: Oil plug / center plug for oil cap |
| 1 | 10-225: Grease seal, 2.25" x 3.38" |
| 1 | 21-35: Dexter-style oil cap, 2.875"-12 |
| 1 | 2475: Bearing, 1.25" ID, fits 02420 race / 7200 lb and 8000 lb axle applications |
| 1 | 25580: Bearing, 1.75" ID, fits 25520 race / 12" drum / big hub applications |
| 1 | 99-865-58HD: Hybrid hub drum, 8000 lb, 8 x 6.5, 5/8" stud configuration |
