Raybestos 781138R Disc Brake Rotor - Rear

Reliable Disc Brake Rotor for Ram ProMaster Vehicles

The Raybestos R-Line 781138R disc brake rotor is engineered for dependable braking performance on Ram ProMaster 1500, 2500, 3500, and ProMaster Rapid models. Designed to meet OEM specifications, this vented rotor ensures consistent heat dissipation and smooth braking under various driving conditions.

• Compatible with Ram ProMaster 1500, 2500, 3500, and ProMaster Rapid
• Part number 781138R for precise fitment
• Vented disc brake rotor design for improved cooling
• Overall height of 3.150 inches (80.000 mm)
• Outside diameter of 11.803 inches (299.800 mm)
• Nominal thickness of 0.866 inches (22.000 mm) with discard thickness at 0.748 inches (19.000 mm)
• Five mounting bolt holes with a 5.118 inch (130.000 mm) bolt circle diameter
• Smooth surface type for consistent pad contact
• Center hole diameter of 3.110 inches (79.000 mm)

About the Raybestos R-Line Brake Rotor

The R-Line by Raybestos is a product line focused on delivering reliable, OEM-quality brake components designed for professional and commercial vehicle applications. This line emphasizes durability and consistent performance, making it suitable for heavy-duty vehicles like the Ram ProMaster series. The 781138R rotor maintains strict manufacturing tolerances to ensure proper fit and function within the braking system.

Technical Specifications and Features

This conventional vented rotor features a smooth surface type that promotes even brake pad wear and effective braking response. The vented design allows for enhanced heat dissipation, reducing the risk of brake fade during extended use. With an outside diameter of 299.8 mm and a nominal thickness of 22 mm, the rotor meets the necessary dimensions for proper fitment on Ram ProMaster 1500, 2500, 3500, and ProMaster Rapid models. The five mounting bolt holes and stud/lug hole quantity ensure secure installation aligned with factory specifications.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Addressing reduced braking efficiency due to rotor thickness below discard limits
• Resolving noise or vibration issues linked to uneven rotor surfaces
• Upgrading to a vented rotor for improved heat management in commercial use
• Ensuring proper rotor fitment for Ram ProMaster brake system maintenance

Installation Notes and Tips

When installing the Raybestos R-Line 781138R rotor, ensure the mounting surface is clean and free of debris to prevent uneven rotor seating. Verify that the rotor thickness is within nominal specifications before installation. Use the correct torque specifications for the five mounting bolts to maintain secure attachment. It is recommended to inspect brake pads and replace them if worn to optimize braking performance with the new rotor.

Quality Assurance and Warranty

Raybestos R-Line rotors are manufactured to meet or exceed OEM standards, providing consistent quality and durability. While specific warranty details for part number 781138R are not provided here, Raybestos products typically come with a limited warranty against defects in materials and workmanship. For exact warranty terms, consult the product documentation or manufacturer.