13″ Brake Rotor for 8000 LB (8K) Trailer Axles
We offers three professional heavy-duty 13-inch Dacromet (GAL-DEX) vented brake disc specifications specially engineered for 8000 LB (8K) trailer axles, covering full mainstream 8K trailer hub and wheel matching demands. The three complete models include: 2/R-133-8D (5/8" stud slip-on rotor), 2/H-133-8D-916 (9/16"hub-integrated rotor assembly), and 2/H-133-8D (hub-integrated rotor assembly). Built to commercial-grade towing standards, these high-load brake discs deliver supreme stopping power, exceptional thermal stability, and long-lasting salt-corrosion resistance for heavy equipment trailers, flatbed trailers, large cargo trailers, and offshore marine trailers.
Featured with a large 13-inch vented cooling structure, this 8K-rated brake disc adopts an optimized internal ventilation channel design. It greatly accelerates air circulation and high-temperature heat dissipation during frequent braking and heavy-load long-distance towing. This structure effectively eliminates brake fade, thermal expansion, and rotor warping caused by continuous high-intensity braking, maintaining consistent, firm, and predictable braking feedback even under maximum 8000 lb axle load and mountainous route conditions. It significantly enhances driving stability and towing safety for heavy-duty trailer operations.
All 8K brake discs are finished with premium GAL-DEX (Dacromet) anti-corrosion coating, the most cost-effective protective solution for harsh marine and roadside environments. The high-adhesion coating can withstand 400–500 hours of standard salt spray testing before excessive rust formation, comprehensively protecting the rotor surface from saltwater corrosion, road salt, humidity, and oxidation. Compared with ordinary painted and galvanized rotors, it avoids coating peeling, surface rust, and premature wear, greatly extending service life and reducing long-term maintenance and replacement costs for coastal and high-salt working scenarios.
This heavy-duty 13" brake disc series features three precise factory-calibrated specifications to fit all 8K axle configurations, with unified high-load structural design and differentiated mounting parameters. All three versions adopt 13-inch vented structure and premium GAL-DEX coating, with detailed size specs as below: Standard 8 on 6.5" bolt circle diameter, available in two stud sizes: 5/8" diameter wheel studs and 9/16" diameter wheel studs, covering both thick and thin stud 8K hub systems. Strict dimensional tolerance control ensures excellent rotational balance, effectively suppressing high-speed vibration and braking jitter, delivering smooth, quiet, and stable braking performance. All models support direct slip-on installation without cutting, drilling, or modification, perfectly fitting mainstream 8K trailer axle hub systems for fast OEM replacement and brake system upgrades.
Constructed with high-strength heat-treated steel and one-piece integral forging technology, this 8K brake disc boasts superior rigidity, impact resistance, and thermal deformation resistance. It can steadily withstand long-term heavy-load braking and high-temperature working conditions without friction attenuation or structural failure, providing durable, sensitive, and uniform heavy-duty braking force for commercial transportation, engineering equipment hauling, and heavy marine trailer applications.
Key Features
- Three Complete 8K Rotor Specifications: Full lineup includes 2/R-133-8D (5/8" stud standalone rotor), 2/R-133-8D-916 (9/16" stud standalone rotor), and 2/H-133-8D (hub-integrated assembly), covering all mainstream 8K trailer hub matching scenarios
- Heavy-Duty 8K Load Rating: Exclusively engineered for 8000 LB trailer axles, ideal for heavy-load commercial trailers, flatbeds, equipment trailers, and large marine trailers
- 13-Inch Vented Cooling System: Large optimized vented structure provides efficient heat dissipation, prevents brake fade and thermal warping under continuous heavy braking
- Premium GAL-DEX Corrosion Protection: Dacromet coating resists rust over 400–500 hours of salt spray testing, perfect for saltwater, coastal, and humid harsh environments
- Precision Differentiated Mounting Specs: Unified 8 on 6.5" bolt circle design; two stud options: 5/8" wheel studs and 9/16" wheel studs, compatible with 16"+ trailer wheels and all mainstream 8K axle hub assemblies
- High-Strength Integral Construction: Heat-treated solid steel structure ensures outstanding rigidity, anti-wear and anti-deformation performance for long-term heavy-duty use
- Direct Slip-On Installation: Factory precision sizing enables tool-free modification, fast and seamless OEM replacement
- Stable & Safe Braking: Excellent rotational balance eliminates high-speed vibration and jitter, ensuring smooth and reliable heavy-load braking performance
Frequently Asked Questions (FAQ)
Q1: What axle weight does this brake disc support?
A1: This 13-inch vented rotor is professionally rated for8000 LB (8K) trailer axles, designed exclusively for heavy-load trailer braking system matching and upgrade.
Q2: What bolt pattern and stud size does this 8K rotor use?
A2: This 8K rotor series features a unified 8 on 6.5" bolt circle diameter, with two optional stud sizes to cover all 8K hub standards: 5/8" diameter wheel studs and 9/16" diameter wheel studs, compatible with all mainstream 8K trailer hub assemblies and 16-inch and larger trailer wheels.
Q3: Why choose vented rotor for 8K heavy-load trailers?
A3: Heavy 8K load generates massive heat during braking. The professional vented structure accelerates rapid heat dissipation, effectively avoiding brake fade, thermal deformation and rotor warping, maintaining stable braking power for long-distance and frequent heavy towing.
Q4: How effective is the Dacromet coating for marine use?
A4: The premium GAL-DEX (Dacromet) coating withstands 400–500 hours of salt spray exposure before excessive rust forms, providing superior saltwater corrosion resistance, greatly extending rotor lifespan for coastal and marine trailer applications.
Q5: What is the difference between 2/R-133-8D and 2/H-133-8D?
A5: The series includes three professional 8K rotor specifications with clear functional positioning. 2/R-133-8D: standalone slip-on rotor with 5/8" studs, suitable for standard thick-stud 8K hub replacement; 2/R-133-8D-916: standalone slip-on rotor with 9/16" studs, designed for thin-stud 8K hub matching; 2/H-133-8D: complete hub-integrated rotor assembly (5/8" standard stud), for full brake system overhaul and new trailer assembly. All three models share identical 13-inch size, 8K load rating, Dacromet coating and 8 on 6.5" bolt circle.
Q6: Does this 8K brake disc require modification during installation?
A6: No modification is required. All dimensions are factory-calibrated to OEM standards, supporting direct slip-on installation for fast, convenient, and accurate replacement of old or worn 8K trailer brake discs.
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