Dynamite Friction 631-54139R Disc Brake Rotor - Front Right

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-54139R) is engineered for reliable braking performance on Ford and Mazda trucks. Designed specifically for models like the Ford Ranger and Mazda B-series trucks, this rotor combines vented construction with a directional, drilled and slotted surface to enhance heat dissipation and braking consistency.

• Compatible with Ford Ranger, Mazda B2300, B3000, and B4000 models
• Part number 631-54139R for precise fitment
• Vented disc brake rotor with drilled and slotted surface
• Nominal thickness of 26.1 mm and discard thickness of 24.5 mm
• Rust-resistant zinc silver hat finish with plain disc finish
• Directional brake surface for optimized performance
• Five bolt holes with 1/2-20 diameter and 114.3 mm bolt circle diameter
• Overall height and height both 108 mm, outside diameter 261 mm

Product Line Details: DFC Brake Rotor - Drilled and Slotted - Silver

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that feature a vented design combined with drilled and slotted surfaces. This configuration helps improve heat dissipation and reduces brake fade under demanding conditions. The zinc silver hat finish provides corrosion resistance, extending rotor life. This product line is tailored for drivers seeking a balance between performance and durability in their braking components.

Technical Description and Specifications

This disc brake rotor is vented to allow better airflow, which helps maintain optimal operating temperatures during braking. The drilled and slotted surface design aids in removing brake dust, gases, and water from the rotor surface, improving pad contact and braking efficiency. The rotor has a nominal thickness of 26.1 mm and a discard thickness of 24.5 mm, indicating when replacement is necessary. The rotor’s hat is coated with a rust-resistant zinc silver finish, while the disc surface is plain, providing a clean and functional appearance. The rotor features five bolt holes with a 1/2-20 diameter and a bolt circle diameter of 114.3 mm, matching the stud/lug hole circle diameter for secure mounting. The overall height and height are both 108 mm, with an outside diameter of 261 mm and a center hole diameter of 63.6 mm, ensuring proper fitment on compatible vehicles.

Applications and Problem Solving

• Replacement rotor for worn or warped brake rotors on Ford Ranger and Mazda B-series trucks
• Improves braking performance by reducing heat buildup and brake fade
• Helps eliminate brake noise and vibration caused by uneven rotor surfaces
• Resists rust and corrosion to extend rotor service life
• Maintains consistent braking under wet or dusty conditions due to drilled and slotted design

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 24.5 mm before installation. Clean the hub surface and mounting area to prevent runout and ensure proper rotor seating. Use the correct torque specifications for the 1/2-20 bolts and verify the rotor’s directional orientation matches the vehicle’s rotation. It is recommended to replace brake pads when installing new rotors to maintain optimal braking performance.

Quality Assurance

Dynamite Friction manufactures this rotor to meet or exceed OEM specifications for fit, form, and function. The rust-resistant zinc silver coating helps protect against corrosion, contributing to longer rotor life. While no specific warranty information is provided, the product is designed for durability and consistent braking performance on compatible Ford and Mazda trucks.