Dynamite Friction 644-31114 Disc Brake Rotor - Rear

Overview of Dynamite Friction DFC GEOSPEC Coated Rotor

The Dynamite Friction DFC GEOSPEC Coated Rotor - Dimpled and Slotted (part number 644-31114) is engineered for precision braking performance. Designed specifically for select BMW models, this vented disc brake rotor offers reliable heat dissipation and consistent stopping power.

• Compatible with multiple BMW models including 230i, 328i, 335i, 340i, 428i, 430i, 435i, 440i, ActiveHybrid 3, and M240i variants
• Vented rotor design with a 345 mm outside diameter for improved cooling
• Dimpled and slotted surface enhances brake pad bite and reduces brake fade
• Nominal thickness of 24 mm with a discard thickness of 22.4 mm for safe rotor replacement
• Five bolt holes with a 16.6 mm diameter and 75 mm inside diameter for secure fitment
• Height of 66.2 mm ensures proper alignment with calipers and brake components

Detailed Product Description

This disc brake rotor from Dynamite Friction is part of the DFC GEOSPEC Coated Rotor - Dimpled and Slotted line, designed to meet the demands of BMW vehicles requiring precise braking control. The vented rotor construction allows for efficient heat dissipation during braking, reducing the risk of warping under high temperatures. The dimpled and slotted surface pattern improves pad contact and helps evacuate gases and debris, contributing to consistent brake performance. With a 345 mm outside diameter and a 24 mm nominal thickness, this rotor maintains structural integrity and durability over time. The five bolt holes with a 16.6 mm diameter and 75 mm inside diameter ensure a secure and exact fit on compatible BMW models.

Compatible BMW Models and Applications

• BMW 230i and 230i xDrive
• BMW 328i
• BMW 330i xDrive
• BMW 335i and 335i xDrive
• BMW 340i and 340i xDrive
• BMW 428i, 428i Gran Coupe, and 428i xDrive
• BMW 430i and 430i xDrive
• BMW 435i, 435i Gran Coupe, 435i xDrive, and 435i xDrive Gran Coupe
• BMW 440i, 440i Gran Coupe, 440i xDrive, and 440i xDrive Gran Coupe
• BMW ActiveHybrid 3
• BMW M240i and M240i xDrive

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup during aggressive driving
• Uneven brake pad wear due to rotor surface imperfections
• Warped rotors resulting in vibration or pulsation during braking
• Reduced braking efficiency from glazed or contaminated rotors
• Corrosion and rust buildup on rotor surfaces affecting performance

Installation Notes and Tips

• Ensure rotor discard thickness of 22.4 mm is not exceeded before replacement
• Clean mounting surface and hub to prevent rotor runout
• Torque bolts to manufacturer specifications for secure fitment
• Inspect brake pads and calipers during installation for optimal performance
• Perform a bed-in procedure after installation to maximize rotor and pad contact

Quality Assurance and Warranty

Dynamite Friction manufactures the DFC GEOSPEC Coated Rotor - Dimpled and Slotted to meet strict quality standards for durability and performance. This rotor is coated to resist corrosion and extend service life. While specific warranty details are not provided, Dynamite Friction products typically adhere to industry standards for material and workmanship reliability.