8K Hybrid Trailer Hub Drum Kit
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.
Part Number: 99-865-58HD-G-KIT 12" x 2" Hybrid Drum 8 Lug on 6.5" • 5/8" Studs
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.
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Bearing Package: Includes 25580 inner bearing and 2475 outer bearing for matching spindle applications.
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Brake Compatibility: Designed for matching 12" x 2" brake applications commonly used in heavy-duty trailer hub drum systems.
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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.
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Check Bearing Numbers: Inner bearing 25580 and outer bearing 2475 should match your existing setup.
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Check Seal Size: This kit includes a 2.25" x 3.38" grease seal, part number 10-225.
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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 |
Verify all measurements, bearing numbers, seal dimensions, drum size, bolt pattern, pilot hole, stud size, cap thread, brake size, and included components before installation. OEM, axle, trailer, or platform references in this listing describe application fitment only unless the product is specifically identified as OEM and verified.
99-865-58HD-G-KIT 8K hybrid trailer hub drum kit, 99-865-58HD hub drum, 8K hybrid hub drum 8x6.5 5/8 studs, Lippert Hybrid L347627 replacement reference hub drum, LCI Lippert hybrid axle hub drum, 12 x 2 trailer brake hub drum 8 lug, 25580 2475 bearing hub drum kit, 10-225 grease seal, 21-35 oil cap, 010-045-00 O-ring, 046-032-00 oil plug, 006-058-00 5/8-18 flange lug nut kit, Kaufman Sure-Trac hybrid axle hub drum
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