Raybestos 681938R Disc Brake Rotor - Rear

Overview of Raybestos R-Line Disc Brake Rotor 681938R

The Raybestos R-Line Disc Brake Rotor 681938R is engineered for reliable braking performance on Ford Mustang models. Designed as a solid, conventional rotor, it offers precise fitment and consistent stopping power tailored to your vehicle's specifications.

• Compatible with Ford Mustang vehicles
• Part number 681938R for exact replacement
• Solid disc brake rotor with smooth surface finish
• Overall diameter of 320 mm (12.598 inches)
• Mounting bolt hole quantity: 5 with 114.3 mm bolt circle diameter
• Nominal thickness of 11.3 mm (0.445 inches) and discard thickness of 9.9 mm (0.390 inches)
• Center hole diameter of 71 mm (2.795 inches)
• Overall height of 41.5 mm (1.634 inches)

Detailed Product Description

This Raybestos R-Line disc brake rotor (part number 681938R) is a solid rotor designed for conventional mounting on Ford Mustang models. The rotor features a smooth surface type that ensures consistent pad contact and braking efficiency. With an outside diameter of 320 mm and a nominal thickness of 11.3 mm, this rotor meets the precise dimensions required for proper fitment and performance. The mounting bolt hole pattern includes five holes spaced on a 114.3 mm bolt circle diameter, matching the Mustang’s factory specifications. The center hole diameter of 71 mm allows for accurate centering on the hub, reducing vibration and promoting even wear.

Raybestos R-Line Product Line

The R-Line by Raybestos is a product line focused on delivering reliable, OEM-quality brake components designed to meet or exceed factory specifications. This line emphasizes durability and consistent performance, making it suitable for drivers seeking dependable replacement parts for their Ford Mustang. The 681938R rotor exemplifies the R-Line’s commitment to quality and fitment accuracy.

Common Applications and Issues Addressed

• Replacement for worn or warped rotors causing brake pulsation
• Restores braking performance affected by rotor thickness below discard limits
• Eliminates noise and vibration from uneven rotor surfaces
• Addresses rotor damage from corrosion or scoring
• Ensures proper fitment for Ford Mustang brake systems requiring 5-bolt mounting

Installation Notes and Tips

• Verify rotor thickness before installation; discard thickness is 9.9 mm
• Ensure mounting surface and hub are clean to prevent runout
• Torque mounting bolts to manufacturer specifications for secure fitment
• Inspect brake pads and replace if worn to maintain optimal braking
• Perform a bed-in procedure after installation for best braking performance

Quality Assurance and Warranty

Raybestos R-Line rotors are manufactured to meet strict quality standards, ensuring consistent dimensions and material integrity. While specific warranty details for part number 681938R should be confirmed with the supplier, Raybestos typically offers coverage against defects in materials and workmanship. This rotor is designed to provide reliable service life when installed and maintained according to vehicle manufacturer guidelines.