Raybestos 981776R Disc Brake Rotor - Front

Overview of Raybestos R-Line Disc Brake Rotor 981776R

The Raybestos R-Line Disc Brake Rotor 981776R is engineered for reliable braking performance on select Mercedes-Benz models. Designed specifically for the CLA250 and GLA250, this vented rotor meets precise specifications to maintain optimal stopping power and vehicle safety.

• Compatible with Mercedes-Benz CLA250 and GLA250 models
• Vented disc brake rotor for improved heat dissipation
• Overall height: 2.012 inches (51.100 mm)
• Outside diameter: 12.598 inches (320.000 mm)
• Mounting bolt hole quantity: 5 with 4.409 inches (112.000 mm) bolt circle diameter
• Nominal thickness: 1.180 inches (29.950 mm)
• Discard thickness: 1.100 inches (27.950 mm)
• Conventional rotor type with drum-in-hat design

Raybestos R-Line Product Line Details

The R-Line by Raybestos is a product line focused on delivering dependable brake components that meet or exceed OEM specifications. This line emphasizes precision manufacturing and consistent material quality, making it suitable for drivers seeking reliable replacement parts. The 981776R rotor exemplifies the R-Line’s commitment to fitment accuracy and performance for Mercedes-Benz vehicles.

Technical Description and Specifications

This disc brake rotor features a vented design to enhance cooling during braking, reducing the risk of brake fade under demanding conditions. The rotor’s overall height measures 2.012 inches (51.100 mm), with an outside diameter of 12.598 inches (320.000 mm), ensuring proper fitment and compatibility with the braking system of the Mercedes-Benz CLA250 and GLA250. It includes five mounting bolt holes arranged on a 4.409-inch (112.000 mm) bolt circle diameter, matching factory specifications. The nominal thickness of 1.180 inches (29.950 mm) provides sufficient material for durability, while the discard thickness of 1.100 inches (27.950 mm) indicates the minimum safe thickness before replacement is necessary. This rotor is a conventional type with a drum-in-hat design, suitable for the specified vehicle models.

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 issues related to uneven rotor surfaces
• Improving heat dissipation to prevent brake fade during extended use
• Ensuring proper fitment and alignment for Mercedes-Benz CLA250 and GLA250 brake systems

Installation Notes and Tips

When installing the Raybestos R-Line 981776R rotor, ensure the vehicle is securely lifted and the wheel assembly is removed. Clean the hub surface to remove rust or debris before mounting the rotor. Verify the rotor’s orientation and bolt hole alignment with the vehicle’s hub. Torque the mounting bolts to manufacturer specifications to avoid warping. It is recommended to replace brake pads simultaneously to maintain optimal braking performance.

Quality Assurance and Warranty

Raybestos R-Line rotors are manufactured to meet stringent quality standards, ensuring consistent performance and durability. The 981776R rotor undergoes rigorous testing to comply with OEM fitment and material requirements. While specific warranty details are not provided here, Raybestos typically offers limited warranties covering defects in material and workmanship. Consult product documentation or authorized sources for exact warranty terms.