Raybestos 580044R Disc Brake Rotor - Rear

Overview of Raybestos R-Line 580044R Disc Brake Rotor

The Raybestos R-Line 580044R disc brake rotor is engineered for reliable braking performance on select Buick, Oldsmobile, and Pontiac vehicles. Designed as a vented, drum-in-hat type rotor, it offers consistent heat dissipation and durability for models like the Buick Rendezvous and Pontiac Montana.

• Vented disc brake rotor with drum-in-hat design
• Outside diameter: 11.430 inches (290.3 mm)
• Nominal thickness: 0.435 inches (11.05 mm)
• Discard thickness: 0.354 inches (9.0 mm)
• Overall height: 1.790 inches (45.45 mm)
• Mounting bolt hole quantity: 5 with 115 mm bolt circle diameter
• Center hole diameter: 2.782 inches (70.65 mm)
• Compatible with Buick Aztek, Montana, Rendezvous, Oldsmobile Silhouette, and Pontiac Montana

Detailed Product Description

The Raybestos R-Line 580044R rotor is a vented disc brake rotor featuring a drum-in-hat design, which integrates a parking brake drum within the rotor assembly. This design is common in many GM vehicles, including the Buick Aztek and Oldsmobile Silhouette. The rotor measures 11.430 inches in outside diameter and has a nominal thickness of 0.435 inches, ensuring adequate material for effective braking and longevity. The discard thickness is 0.354 inches, indicating the minimum thickness before replacement is necessary. The rotor’s overall height is 1.790 inches, and it mounts using five bolt holes arranged on a 115 mm bolt circle diameter, matching the factory specifications for the listed vehicles.

About the Raybestos R-Line Product Line

The R-Line by Raybestos is designed to meet the demands of everyday driving with a focus on durability and consistent braking performance. This product line offers rotors that maintain OEM fitment and function, making them suitable replacements for vehicles requiring vented, drum-in-hat rotors like the 580044R. The R-Line rotors are engineered to provide reliable stopping power while supporting integrated parking brake systems.

Common Applications and Issues Addressed

• Replacement for worn or warped rotors causing brake pulsation
• Restores braking efficiency on Buick Rendezvous and Pontiac Montana models
• Addresses noise and vibration issues related to rotor wear
• Supports proper parking brake function with drum-in-hat design
• Prevents brake fade due to improved heat dissipation from vented rotor design

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (0.354 inches) before installation
• Clean mounting surface and hub to prevent runout and vibration
• Torque mounting bolts to manufacturer specifications for 5-lug, 115 mm bolt circle
• Inspect brake pads and hardware for wear during rotor replacement
• Verify compatibility with vehicle make and model before installation

Quality Assurance and Warranty

Raybestos R-Line rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The 580044R rotor undergoes rigorous quality control to ensure consistent performance and durability. While specific warranty details may vary, Raybestos typically offers limited warranties covering defects in materials and workmanship. Consult product documentation for exact warranty terms.