12″ Brake Rotor for 5200–6000 LB Trailer Axles
We provides two premium 12-inch Dacromet (GAL-DEX) vented brake disc options for heavy-duty trailer upgrades: 2/R-12" and 2/H-12". Both models are professionally engineered to fit 5,200–6,000 lb trailer axles, delivering upgraded heavy-duty braking performance for mid-to-large load trailer systems. Designed and precision-machined to meet commercial trailer safety standards, these Dacromet-coated rotors serve as ideal OEM replacements and performance upgrades for marine, equipment, cargo, and flatbed trailers that require stronger load capacity, stable braking output, and long-term corrosion resistance.
Built with a robust one-piece integral structure and advanced vented cooling design, this 12" brake disc effectively solves heat accumulation issues during frequent braking and high-load towing. The internal vented channel structure accelerates rapid air circulation and heat dissipation, significantly reducing brake fade, thermal deformation, and overheating failure under continuous braking conditions. Compared with solid rotors, it maintains consistent braking friction and stable pedal feedback during long-distance hauling and mountain road driving, greatly improving overall towing safety.
Finished with high-grade Dacromet (GAL-DEX) anti-corrosion coating, this brake disc provides excellent defense against rust, oxidation, road salt, rainwater, and coastal salt spray. In professional salt spray testing, the coating resists excessive rust formation for 400–500 hours, far exceeding ordinary spray-painted and galvanized finishes. The uniform and adhesive coating also prevents surface peeling and wear, extending the rotor service life and lowering long-term maintenance and replacement costs perfectly for humid, coastal, and harsh outdoor working environments.
Featuring industry-standard precision dimensional calibration, this 12" brake disc adopts a 6 on 5.5" bolt circle with 1/2" diameter wheel studs, fully compatible with mainstream 5.2K–6K trailer axle hub assemblies. Strict dimensional tolerance control ensures excellent rotational balance, effectively suppressing high-speed vibration and braking jitter, achieving smooth, quiet, and reliable braking performance. The slip-on installation design enables direct replacement without extra cutting, drilling, or modification, greatly simplifying installation and system upgrade procedures.
Specially optimized for 5200 lb to 6000 lb high-capacity trailer axles, this heavy-duty brake disc adopts high-strength heat-treated steel material, featuring outstanding rigidity, impact resistance, and wear resistance. It resists thermal expansion, deformation, and friction attenuation under heavy-load and high-temperature working conditions, providing durable, sensitive, and uniform braking force for daily transportation, commercial towing, and engineering equipment trailers.
Key Features
- Two Available 12" Dacromet Rotor Models: Comes in two versions for 5200–6000 LB axles – 2/R-12" (standalone slip-on rotor) and 2/H-12" (hub-integrated rotor assembly), covering replacement and full assembly upgrade needs.
- Heavy-Duty Capacity Matching: Exclusively designed for 5200–6000 LB trailer axles, suitable for mid and large-load commercial trailer braking system upgrades and replacements
- 12-Inch Vented Cooling Structure: Professional vented design accelerates heat dissipation, eliminates brake fade, and maintains stable braking performance under continuous high-load operation
- Premium Dacromet Anti-Corrosion Coating: GAL-DEX coating withstands 400–500 hours of salt spray testing, excellent rust and saltwater corrosion resistance for coastal and wet environments
- Precision Standard Mounting Specs: Features a 6 on 5.5" bolt circle with 1/2" diameter wheel studs, fully compatible with mainstream 5.2K-6K axle hub assemblies for universal fitment
- High-Strength Durable Construction: Heat-treated integral steel structure, anti-deformation and anti-wear, stable braking output for long-term heavy-duty use
- Wide Application Scenarios: Ideal for equipment trailers, cargo trailers, marine trailers, flatbed trailers and other heavy-duty trailer models
Frequently Asked Questions (FAQ)
Q1: What axle weight range does this 12″ brake disc fit?
A1: This brake disc is precisely engineered for 5,200 lb to 6,000 lb trailer axles, perfectly matching mid-to-high load capacity trailer hub and brake assembly systems.
Q2: What bolt pattern does this rotor adopt?
A2: It features precise standard mounting specs of 6 on 5.5" bolt circle paired with 1/2-inch wheel studs, compliant with mainstream 5.2K–6K trailer axle mounting standards for universal compatibility and seamless installation.
Q3: What are the benefits of the vented rotor design?
A3: The vented structure greatly improves heat dissipation efficiency during braking, effectively avoiding brake fade, thermal deformation and high-temperature failure caused by long-time or frequent braking, keeping braking force stable and consistent.
Q4: How durable is the Dacromet coating?
A4: The high-quality GAL-DEX (Dacromet) coating can resist excessive rust for 400–500 hours in standard salt spray tests, providing superior anti-corrosion performance for saltwater, coastal and humid working conditions, and significantly reducing maintenance frequency.
Q5: Does this rotor require professional modification during installation?
A5: No modification is needed. This is a direct slip-on replacement rotor with strictly calibrated standard dimensions, enabling fast and convenient installation to replace old or damaged discs perfectly.
Q6: What is the difference between 2/R-12" and 2/H-12" 12-inch brake discs?
A6: Both rotors share identical 12-inch vented structure, Dacromet anti-corrosion coating, and 6 on 5.5" / 1/2" stud mounting specs for 5200–6000 LB axles. The core difference lies in structure and usage: 2/R-12" is a standalone slip-on rotor, designed for direct rotor-only replacement to match existing good-condition hubs;2/H-12" is a complete hub-integrated rotor assembly, ideal for full axle brake system overhaul, new trailer assembly, or replacing worn hub and rotor as a whole.
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