Raybestos 781766R Disc Brake Rotor - Front

Overview of Raybestos R-Line Disc Brake Rotor 781766R

The Raybestos R-Line Disc Brake Rotor 781766R is engineered for reliable braking performance on Ram ProMaster vehicles. Designed specifically for Ram ProMaster 1500, 2500, 3500, and ProMaster Rapid models, this vented rotor meets precise specifications to maintain optimal stopping power and durability.

• Compatible with Ram ProMaster 1500, 2500, 3500, and ProMaster Rapid
• Part number 781766R for exact fitment
• Vented disc brake rotor with smooth surface finish
• Nominal thickness of 1.260 inches (32.000 mm) and discard thickness of 1.181 inches (30.000 mm)
• Overall height of 1.141 inches (29.000 mm) and outside diameter of 11.811 inches (300.000 mm)
• Five mounting bolt holes with 0.694 inch (17.650 mm) diameter
• Center hole diameter of 3.150 inches (80.000 mm) for proper hub alignment

Detailed Specifications and Features

This Raybestos R-Line rotor is a vented, conventional type designed to dissipate heat efficiently during braking, reducing the risk of brake fade. The smooth surface type ensures consistent pad contact and wear. With a nominal thickness of 1.260 inches (32.000 mm) and a discard thickness of 1.181 inches (30.000 mm), this rotor maintains structural integrity and safety throughout its service life. The rotor’s outside diameter measures 11.811 inches (300.000 mm), and it features five mounting bolt holes arranged on a 5.110 inch (129.800 mm) bolt circle diameter, ensuring compatibility with the specified Ram ProMaster models. The center hole diameter of 3.150 inches (80.000 mm) allows for precise hub fitment, critical for maintaining wheel balance and brake performance.

About the Raybestos R-Line Product Line

The R-Line by Raybestos is a product line focused on delivering reliable, OEM-quality brake components for commercial and passenger vehicles. This line emphasizes durability and consistent performance, making it suitable for demanding applications such as those encountered by Ram ProMaster vans. The 781766R rotor exemplifies the R-Line’s commitment to meeting exacting standards for fit, form, and function.

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 and vibration issues linked to uneven rotor surfaces
• Upgrading to vented rotors for improved heat dissipation in heavy-duty use
• Ensuring proper fitment on Ram ProMaster 1500, 2500, 3500, and ProMaster Rapid models

Installation Notes and Tips

When installing the Raybestos R-Line 781766R rotor, ensure the mounting surface and hub are clean and free of rust or debris to maintain proper rotor alignment. Torque the five mounting bolts to manufacturer specifications to avoid rotor warping. It is recommended to replace brake pads simultaneously to ensure even wear and optimal braking performance. Verify rotor thickness before installation to confirm it meets or exceeds the nominal thickness of 1.260 inches (32.000 mm).

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 781766R should be confirmed with the supplier, Raybestos typically offers coverage against defects in materials and workmanship. This ensures confidence in the rotor’s performance on Ram ProMaster vehicles.