Dynamite Friction 900-31097A Disc Brake Rotor - Front

Reliable Performance for BMW Disc Brake Systems

The Dynamite Friction DFC Hi-Carbon Alloy GEOMET Coated Rotor (Part Number 900-31097A) is engineered to provide consistent braking performance for select BMW models. Designed specifically for vehicles like the BMW 535d, 535i, and 640i series, this vented disc brake rotor ensures effective heat dissipation and durability under demanding driving conditions.

Key Features of the DFC Hi-Carbon Alloy GEOMET Coated Rotor

• Nominal thickness of 30 mm with a discard thickness of 28.4 mm for reliable wear limits
• Vented rotor design enhances cooling and reduces brake fade
• Outside diameter measures 348 mm, compatible with specific BMW brake assemblies
• Five bolt holes with a diameter of 16.6 mm for secure mounting
• Height of 66.5 mm and inside diameter of 75 mm tailored for precise fitment

About the DFC Hi-Carbon Alloy GEOMET Coated Rotor Line

The DFC Hi-Carbon Alloy GEOMET Coated Rotor line by Dynamite Friction focuses on combining high-carbon alloy materials with a GEOMET coating to improve rotor longevity and corrosion resistance. This coating helps protect the rotor surface from rust and environmental damage, maintaining braking efficiency over time. The high-carbon alloy construction contributes to enhanced thermal stability and wear resistance, making it suitable for BMW models requiring reliable disc brake rotors.

Product Description and Specifications

This disc brake rotor is designed as a vented type, which allows air to flow between the rotor surfaces, improving heat dissipation during braking. The rotor’s 348 mm outside diameter and 75 mm inside diameter ensure compatibility with the brake system of BMW 535d, 535i, 640i, and related xDrive and Gran Coupe variants. The five bolt holes, each 16.6 mm in diameter, provide a secure fitment to the wheel hub. With a nominal thickness of 30 mm and a discard thickness of 28.4 mm, this rotor meets wear specifications to maintain safe braking performance.

Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 535d and 640i models
• Improves heat management to reduce brake fade during extended use
• Addresses rotor corrosion issues with GEOMET coating
• Restores braking precision and pedal feel in vented rotor applications
• Compatible with both standard and xDrive versions of specified BMW models

Installation Notes and Tips

Ensure the rotor surface and hub mounting area are clean and free of debris before installation. Verify the rotor thickness is within the discard limits to maintain safety standards. Use proper torque specifications for the five bolt holes to secure the rotor firmly. It is recommended to inspect brake pads and related hardware during rotor replacement to ensure optimal braking system performance.

Quality Assurance and Warranty

Dynamite Friction manufactures the 900-31097A rotor to meet OEM standards for fit and function on compatible BMW models. The GEOMET coating provides additional corrosion resistance, contributing to the rotor’s durability. Warranty details should be confirmed with the product documentation or supplier, as they may vary.