Raybestos 980428R Disc Brake Rotor - Rear

Overview of Raybestos R-Line Disc Brake Rotor 980428R

The Raybestos R-Line Disc Brake Rotor 980428R is engineered for reliable braking performance on select Mercedes-Benz models. Designed as a solid, drum-in-hat type rotor, it meets precise specifications to ensure compatibility and durability for vehicles like the GL320, ML350, and R500.

• Solid disc brake rotor with drum-in-hat design
• Outside diameter: 12.992 inches (330.000 mm)
• Nominal thickness: 0.551 inches (14.000 mm)
• Discard thickness: 0.449 inches (11.400 mm)
• Overall height: 2.480 inches (63.000 mm)
• Mounting bolt hole quantity: 5 with 4.409 inches (112.000 mm) bolt circle diameter
• Center hole diameter: 2.638 inches (67.000 mm)
• Compatible with multiple Mercedes-Benz models including GL320, ML320, ML350, ML450, ML500, ML550, R320, R350, and R500

Detailed Product Description

The Raybestos R-Line 980428R disc brake rotor is a solid rotor featuring a drum-in-hat design, which integrates the parking brake drum within the rotor itself. This design is common in many Mercedes-Benz SUVs and crossovers, providing a compact and efficient braking solution. The rotor measures 12.992 inches in outside diameter and has a nominal thickness of 0.551 inches, with a discard thickness of 0.449 inches, indicating when replacement is necessary to maintain safe braking performance. The overall height of 2.480 inches ensures proper fitment within the brake assembly. The rotor includes five mounting bolt holes arranged on a 4.409-inch bolt circle diameter, matching the factory specifications for the listed Mercedes-Benz models.

Raybestos R-Line Product Line Information

The R-Line by Raybestos is designed to offer dependable, OE-quality brake components that meet or exceed original equipment specifications. This product line focuses on providing rotors that deliver consistent performance and durability, making it suitable for drivers who require reliable braking on their Mercedes-Benz GL and ML series vehicles. The 980428R rotor exemplifies the R-Line’s commitment to precision fit and function.

Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation or noise
• Restores proper braking performance on Mercedes-Benz GL320, ML350, and related models
• Addresses rotor thickness below discard limits to maintain safety
• Solves issues related to uneven brake pad wear due to rotor surface irregularities
• Compatible with vehicles requiring a drum-in-hat rotor design for integrated parking brake function

Installation Notes and Tips

• Verify rotor dimensions and bolt pattern match vehicle specifications before installation
• Inspect brake pads and replace if worn to ensure optimal rotor performance
• Clean rotor surface to remove any protective coatings or debris prior to installation
• Torque mounting bolts to manufacturer specifications to avoid rotor warping
• Check parking brake adjustment after installation due to drum-in-hat design

Quality Assurance and Warranty

Raybestos R-Line rotors are manufactured to meet strict quality standards, ensuring consistent thickness and dimensional accuracy. While specific warranty details for part number 980428R should be confirmed with the supplier, Raybestos typically offers limited warranties covering defects in materials and workmanship. This rotor is designed to provide reliable braking performance when installed and maintained according to vehicle manufacturer guidelines.