Dynamite Friction 830-31106L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31106L) is engineered for BMW models including the 535i, 550i, 640i, 650i, and 7 Series variants. This vented disc brake rotor combines drilled and slotted surface technology with a rust-resistant coating to enhance braking performance and durability.

• Disc type: Vented, drilled and slotted surface
• Nominal thickness: 23.8 mm; discard thickness: 22.4 mm
• Outside diameter: 345 mm; overall height: 69.1 mm
• Hat finish: Geospec silver grey with rust-resistant coating
• Bolt hole quantity: 5; bolt circle diameter: 120 mm
• Directional brake surface design for optimized heat dissipation

Detailed Product Features and Specifications

This Dynamite Friction rotor features a vented design that improves heat dissipation during braking, reducing the risk of brake fade under demanding conditions. The drilled and slotted surface enhances water and debris evacuation, maintaining consistent braking performance. The rotor’s nominal thickness of 23.8 mm ensures structural integrity, while the discard thickness of 22.4 mm indicates the minimum safe thickness for replacement. The hat is finished in Geospec silver grey and treated with a rust-resistant coating to protect against corrosion and extend service life.

The rotor is designed with a directional brake surface, which optimizes airflow and cooling. It includes five bolt holes with a 16.6 mm diameter and a bolt circle diameter of 120 mm, matching the specifications required for various BMW models such as the 535i GT xDrive, 640i Gran Coupe, and 740Li xDrive.

DFC Geoperformance Rotor - Drilled and Slotted Product Line

The DFC Geoperformance Rotor - Drilled and Slotted line by Dynamite Friction focuses on delivering rotors that balance performance and durability. This product line incorporates advanced surface treatments and vented rotor designs to improve braking efficiency and heat management. The drilled and slotted features help maintain clean contact surfaces between the rotor and brake pads, which is critical for consistent stopping power in BMW vehicles.

Applications and Problem Solving

• Reduces brake fade during high-performance or extended braking
• Improves water and debris clearance for wet weather braking
• Minimizes rotor warping through enhanced heat dissipation
• Protects against rust and corrosion for longer rotor life
• Maintains consistent braking performance on BMW 535i, 550i, 640i, 650i, and 7 Series models

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 22.4 mm before installation. The rotor is directional; install it according to the rotation direction indicated on the surface to maximize performance. Verify bolt hole alignment with the vehicle’s hub using the 120 mm bolt circle diameter and 16.6 mm bolt hole diameter. Clean the rotor surface before installation to remove any protective coatings or residues.

Quality Assurance and Warranty

Dynamite Friction manufactures this rotor to meet OEM specifications for fitment and performance on compatible BMW models. The rust-resistant coating adds durability against environmental factors. Warranty details are provided by the manufacturer and should be confirmed at the time of purchase.