Dynamite Friction 631-31138R Disc Brake Rotor - Rear Right

Overview of the DFC Brake Rotor for BMW X5

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31138R) is engineered specifically for BMW X5 models. This vented disc brake rotor combines drilled and slotted surface features to enhance braking performance and heat dissipation under demanding conditions.

• Compatible with BMW X5 vehicles
• Part number 631-31138R for precise identification
• Vented rotor design for improved cooling
• Directional drilled and slotted surface for enhanced brake pad bite and debris removal
• Rust resistant zinc silver hat finish
• Nominal thickness of 20 mm with discard thickness at 18.4 mm
• 5 bolt holes with 16.6 mm diameter and 120 mm bolt circle diameter
• Overall diameter of 324 mm and height of 80.1 mm

Details on the DFC Brake Rotor - Drilled and Slotted - Silver Line

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that feature a combination of drilled holes and slots on the braking surface. This design improves water and gas evacuation during braking, reducing brake fade and maintaining consistent stopping power. The zinc silver coating on the rotor hat provides corrosion resistance, extending the rotor's service life. This product line is tailored for drivers seeking reliable performance with enhanced rotor durability.

Technical Specifications and Features

This disc brake rotor is vented, allowing air to flow between the rotor surfaces to dissipate heat more effectively during braking. The rotor’s directional surface is both drilled and slotted, which helps maintain clean contact between the brake pad and rotor by channeling away dust, gases, and moisture. The rotor measures 324 mm in outside diameter and 80.1 mm in height, with a center hole diameter of 75 mm. It features five bolt holes, each 16.6 mm in diameter, arranged on a 120 mm bolt circle diameter, ensuring proper fitment on the BMW X5 hub assembly. The nominal thickness is 20 mm, with a discard thickness of 18.4 mm, indicating when the rotor should be replaced to maintain safe braking performance.

Applications and Problem Solving

• Replacement rotor for worn or warped BMW X5 brake rotors
• Improves heat dissipation to reduce brake fade during heavy braking
• Helps maintain consistent braking performance in wet or dusty conditions
• Addresses rotor corrosion issues with rust resistant coating
• Enhances brake pad contact and reduces noise through slotted and drilled design

Installation Notes and Tips

Ensure the rotor surface is clean and free of any protective coatings before installation. Verify the rotor thickness is above the discard thickness of 18.4 mm before mounting. Use proper torque specifications for the 5 lug bolts with 16.6 mm diameter holes on a 120 mm bolt circle. It is recommended to replace brake pads when installing new rotors to ensure optimal braking performance. Directional rotors must be installed following the indicated rotation direction for correct operation.

Quality Assurance

Dynamite Friction manufactures the 631-31138R rotor to meet OEM specifications for the BMW X5. The rust resistant zinc silver coating on the rotor hat enhances durability against corrosion. While no specific warranty information is provided, this rotor is designed to maintain consistent braking performance and structural integrity under normal operating conditions.