Raybestos 9812R Disc Brake Rotor - Front

Overview of Raybestos R-Line 9812R Disc Brake Rotor

The Raybestos R-Line 9812R disc brake rotor is engineered for reliable braking performance on select BMW models. Designed specifically for the BMW 535i, 535is, and 635CSi, this vented rotor meets precise specifications to maintain optimal stopping power and durability.

• Vented disc brake rotor for improved heat dissipation
• Overall height: 3.005 inches (76.350 mm)
• Outside diameter: 11.090 inches (281.700 mm)
• Nominal thickness: 0.975 inches (24.750 mm)
• Discard thickness: 0.945 inches (24.000 mm)
• Five mounting bolt holes with 120 mm bolt circle diameter
• Center hole diameter: 3.113 inches (79.050 mm)
• Conventional rotor type compatible with drum-in-hat setups

Raybestos R-Line Product Line Details

The R-Line by Raybestos focuses on delivering rotors that balance performance and durability for daily driving and light performance applications. This line emphasizes precise fitment and consistent manufacturing standards, making the 9812R rotor a suitable replacement part for BMW vehicles requiring vented rotors with conventional mounting configurations.

Technical Description and Specifications

The 9812R rotor features a vented design that enhances cooling during braking, reducing the risk of brake fade under normal driving conditions. With a nominal thickness of 0.975 inches and a discard thickness of 0.945 inches, this rotor provides a clear service life indicator to ensure safe replacement intervals. The rotor’s 11.090-inch outside diameter and 3.005-inch overall height are engineered to match the original equipment specifications for the BMW 535i, 535is, and 635CSi models. The five mounting bolt holes with a 120 mm bolt circle diameter and a center hole diameter of 3.113 inches ensure proper alignment and secure installation.

Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 535i, 535is, and 635CSi
• Addresses brake noise and vibration issues caused by uneven rotor surfaces
• Improves braking consistency by restoring proper rotor thickness
• Helps prevent brake fade through vented rotor design
• Compatible with conventional drum-in-hat brake systems

Installation Notes and Tips

When installing the Raybestos R-Line 9812R rotor, ensure the mounting surface is clean and free of debris to maintain proper rotor seating. Verify that the rotor thickness is above the discard thickness before installation. Use a calibrated torque wrench to tighten the five mounting bolts to the manufacturer’s specifications. It is recommended to replace brake pads simultaneously to ensure optimal braking performance and rotor longevity.

Quality Assurance and Warranty

Raybestos R-Line rotors are manufactured to meet or exceed OEM standards for fit, form, and function. Each rotor undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details are not provided here, Raybestos typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.