Dynamite Friction 900-31183D Disc Brake Rotor - Front Right

Overview of Dynamite Friction DFC Hi-Carbon Alloy GEOMET Coated Rotor

The Dynamite Friction DFC Hi-Carbon Alloy GEOMET Coated Rotor (part number 900-31183D) is engineered for reliable braking performance on select BMW and Mini models. Designed with a vented, directional disc surface and a rust-resistant Geomet grey coating, this rotor supports consistent stopping power and durability.

• Nominal thickness: 30 mm with discard thickness at 28.4 mm
• Vented disc design for improved heat dissipation
• Directional smooth surface for optimized braking contact
• Rust-resistant Geomet grey coating on the hat finish
• 5 bolt holes with 16.7 mm diameter and 112 mm bolt circle diameter
• Outside diameter of 360 mm and height of 45.7 mm
• Center hole diameter of 67 mm for precise fitment

Product Line Details: DFC Hi-Carbon Alloy GEOMET Coated Rotor

This rotor is part of the DFC Hi-Carbon Alloy GEOMET Coated Rotor line by Dynamite Friction, which focuses on high-carbon alloy construction combined with a GEOMET coating. The high-carbon alloy enhances rotor strength and wear resistance, while the GEOMET coating provides corrosion protection, extending rotor life. This combination is designed to maintain braking efficiency and rotor integrity under demanding conditions.

Technical Description and Fitment

The 900-31183D rotor features a vented design that helps dissipate heat generated during braking, reducing the risk of brake fade. Its directional smooth surface ensures consistent pad contact and braking performance. The rotor’s plain disc finish and Geomet grey hat finish contribute to corrosion resistance, important for vehicles exposed to moisture and road salts. With 5 bolt holes and a 112 mm bolt circle diameter, this rotor is compatible with specific BMW and Mini models including the BMW 228i xDrive Gran Coupe, M235i xDrive Gran Coupe, X2, and Mini Cooper, Cooper Clubman, and Cooper Countryman.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Upgrading corroded rotors to improve braking reliability
• Addressing rotor thickness below discard limits (28.4 mm)
• Improving heat dissipation to reduce brake fade on performance vehicles
• Ensuring proper fitment for BMW 228i xDrive Gran Coupe and Mini Cooper models

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 28.4 mm before installation. Verify bolt hole alignment with the 5-lug, 112 mm bolt circle diameter pattern. Clean the hub surface and rotor mounting area to prevent runout. Use proper torque specifications for the 16.7 mm bolt holes to secure the rotor. The directional brake surface requires correct orientation during installation to maintain braking efficiency.

Quality Assurance

Dynamite Friction manufactures the 900-31183D rotor to meet OEM specifications for fit and function. The high-carbon alloy construction combined with the GEOMET coating provides durability and corrosion resistance. While no specific warranty information is provided, this rotor is designed to maintain consistent braking performance for the compatible BMW and Mini models listed.