Raybestos 780139 Specialty Truck Rear Disc Brake Rotor

The Raybestos 780139 is a Specialty Truck disc brake rotor designed specifically for heavy-duty truck applications. This drum-in-hat style rear brake rotor is engineered to deliver dependable stopping power for medium-duty vehicles and provides superior performance in noise-prone applications.

Key Specifications:

• Outside Diameter: 13.855 inches (351.9mm)
• Nominal Thickness: 1.185 inches (30.1mm)
• Discard Thickness: 1.118 inches (28.4mm)
• Bolt Pattern: 8 x 6.5 inches (8 x 165.1mm)
• Center Hole Diameter: 4.843 inches (123mm)
• Rotor Construction: Vented, drum-in-hat configuration

Features and Benefits:

• Application-specific iron metallurgy for extended service life
• Vehicle-specific cooling vane configurations for optimal heat dissipation
• Precision-machined to meet or exceed OE fit, form, and function
• Non-directional ground finish for installation-ready convenience
• SAE-compliant standards for strength and durability
• Engineered to reduce noise and vibration
• Corrosion-resistant construction

Part of the Raybestos Specialty Truck & Medium Duty line, this rotor is specifically built for Class 1-8 truck applications. It features tight lateral runout tolerances and minimal thickness variation to ensure consistent, predictable braking performance. OEM part number cross-references include Chrysler 05083728AA, 5083728AA, 52010144AA, and Brembo 09.B655.10.