10K Trailer Axle Hub & Drum Kit
Hub-Centric 10,000 lb Hub & Drum Kit for Electric or Hydraulic Brakes
Complete hub-centric hub and drum kit for specific 10,000 lb axle brake applications using electric or hydraulic brakes. Built around a 12-1/4" x 3-1/2" brake configuration with an 8 on 6.5" bolt pattern and 4.88" hub pilot bore.
Part Number: 99-86510-568270-KIT 10,000 lb Axle Applications 8 on 6.5" · 4.88" Pilot
Key Measurements & Specs
| Specification | Detail |
| Part Number / SKU | 99-86510-568270-KIT |
| Product Type | Hub-centric hub and drum kit |
| Axle Rating | 10,000 lb |
| Drum Size | 12-1/4" diameter x 3-1/2" shoe width |
| Bolt Pattern | 8 on 6.5" |
| Hub Pilot Bore | 4.88" |
| Stud Size | 5/8"-18 TPI |
| Quantity Included | Kit |
Fitment / Application
| Category | Details |
| Trailer / System | Specific 10,000 lb trailer axle brake applications |
| Brake Compatibility | Electric or hydraulic brake systems using 12-1/4" x 3-1/2" brakes |
| Mounting Style | Hub-centric / hub-piloted wheel mounting |
| Reference Numbers | Dexter K71-481-09 · AL-KO 568270 |
| Fitment Method | Verify bearing numbers, seal number, brake size, bolt pattern, stud size, and 4.88" hub pilot bore before ordering. |
Top Features
| Feature | Buyer Benefit |
| Hub-Centric Design | Designed for hub-piloted wheel mounting where the wheel centers on the hub pilot. |
| 10K Brake Application | Built for specific 10,000 lb axle setups using 12-1/4" x 3-1/2" brake assemblies. |
| Complete Wear-Component Kit | Includes the hub/drum assembly plus bearings, seal, oil cap components, and armature plate. |
| Common Reference Numbers | Useful for cross-checking against Dexter K71-481-09 and AL-KO 568270 application references. |
Overview
This listing is for a complete hub-centric hub and drum kit designed for specific 10,000 lb axle brake applications using either electric or hydraulic brakes. The kit includes the hub/drum assembly along with the primary wear components required for installation on compatible spindles.
R&P Service Insight
Large-capacity trailer hub and drum assemblies must be matched by dimensions, not by axle rating alone. Before installation, confirm every critical fitment point against the hub being replaced.
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Hub Pilot: This kit uses a 4.88" pilot bore for hub-centric wheel mounting.
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Brake Match: Confirm the brake drum is being used with 12-1/4" x 3-1/2" brake assemblies.
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Spindle Match: Verify the inner bearing, outer bearing, and seal numbers before ordering.
R&P Knowledge Hub
Compatibility: This kit is intended for compatible 10,000 lb hub-centric axle and brake configurations where the listed measurements match the original hub/drum assembly.
Vehicle / System Fit: Trailer axle hub and drum applications using electric or hydraulic brakes with a 12-1/4" drum diameter and 3-1/2" brake shoe width.
Installation Notes: Verify spindle bearing sizes, seal size, brake dimensions, bolt pattern, stud size, and hub pilot bore before installation.
Performance Insight: Hub-centric wheel mounting centers the wheel on the hub pilot rather than relying only on the wheel studs for centering.
Brand & Fitment Note
Selling Brand: R&P Carriages curated service kit
Application Reference: Dexter K71-481-09 and AL-KO 568270 are provided as manufacturer reference numbers for application comparison.
What This Means: This listing is for a hub-centric 10,000 lb hub and drum kit, not a guaranteed OEM-branded item unless specifically stated and verified.
Before Ordering: Always verify bearing numbers, seal number, brake size, bolt pattern, stud size, hub pilot bore, and included components before installation.
R&P Repair Insight
Many fitment issues on heavy trailer hubs come from confusing hub-centric and lug-centric wheel mounting or assuming all 8-lug hub/drums interchange. Confirm the hub pilot and internal wear components before replacing the hub/drum.
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Pilot Bore Check: This hub pilot bore is 4.88". Confirm your wheel and original hub match this measurement.
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Bearing Check: This kit includes 28580 inner and 25580 outer bearings.
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Seal Check: This kit includes 91030 seal. Confirm your spindle and original seal match before installation.
Features
Hub-Centric 10K Hub/Drum Assembly
Designed for specific 10,000 lb axle applications where a hub-piloted 4.88" pilot bore is required.
Electric or Hydraulic Brake Compatibility
Used with compatible electric or hydraulic brake systems requiring a 12-1/4" drum and 3-1/2" brake shoe width.
8 on 6.5" Bolt Pattern
Configured with 8 wheel studs using 5/8"-18 threads and an 8 on 6.5" wheel bolt pattern.
Common Casting References
Casting numbers are commonly marked 7290 or 7170 for identification and comparison.
Included Components
| Component | Detail |
| Hub/Drum Assembly | Hub-centric 10,000 lb hub and drum assembly |
| Inner Bearing | 28580 |
| Outer Bearing | 25580 |
| Seal | 91030 |
| Oil Cap | 021-219-00 |
| Oil Cap O-Ring | 010-258-00 |
| Oil Cap Plug | 085-017-00 |
| Armature Plate | Included |
Fitment Advisory: This is a hub-centric hub and drum kit intended for specific 10,000 lb axle and brake configurations. Most 8,000 lb and larger trailer axle hub/drum assemblies are hub-centric, not lug-centric. This hub pilot bore is 4.88". Always verify spindle bearing sizes, seal size, brake dimensions, bolt pattern, stud size, and hub pilot bore before installation.
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