Dynamite Friction 830-31112L Disc Brake Rotor - Front Left

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31112L) is engineered for BMW models including the 335i, 340i, 435i, 440i, and ActiveHybrid 3 series. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Nominal thickness: 30 mm with a discard thickness of 28.4 mm
• Vented rotor design for improved cooling
• Directional slotted and drilled surface for debris removal and heat management
• Plain disc finish with Geospec silver grey hat finish
• Rust resistant coating to extend rotor life
• 5 bolt holes with 16.5 mm diameter and 120 mm bolt circle diameter
• Overall diameter of 370 mm and height approximately 73.3 mm

Detailed Product Description

The DFC Geoperformance Rotor - Drilled and Slotted by Dynamite Friction is designed specifically for select BMW vehicles such as the 335i, 340i, 435i, 440i, and ActiveHybrid 3 models. This rotor features a vented construction that helps dissipate heat more effectively during braking, reducing the risk of brake fade under demanding conditions. The directional slotted and drilled surface improves water and gas evacuation, maintaining consistent braking performance in wet or high-temperature environments.

The rotor’s nominal thickness is 30 mm, with a discard thickness of 28.4 mm, ensuring a durable lifespan while maintaining safety standards. The plain disc finish combined with a Geospec silver grey hat finish provides corrosion resistance and a clean appearance. Additionally, the rust resistant coating further protects the rotor from environmental damage, extending its service life.

DFC Geoperformance Rotor - Drilled and Slotted Product Line

The DFC Geoperformance Rotor - Drilled and Slotted line by Dynamite Friction focuses on delivering rotors with enhanced thermal management and surface design. The drilled and slotted features are engineered to improve braking response and reduce heat buildup, making this product line suitable for performance-oriented driving and daily use on compatible BMW models.

Applications and Problem Solving

• Reduces brake fade during aggressive or repeated braking
• Improves water and debris evacuation for consistent braking in wet conditions
• Minimizes rotor warping through enhanced heat dissipation
• Protects against rust and corrosion with specialized coatings
• Maintains braking performance on BMW 335i, 340i, 435i, 440i, and ActiveHybrid 3 vehicles

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 28.4 mm before installation. The rotor features a 5-lug bolt pattern with 16.5 mm diameter holes and a 120 mm bolt circle diameter, compatible with specified BMW models. Proper torque specifications should be followed when mounting to avoid rotor distortion. It is recommended to inspect brake pads and calipers during installation for optimal performance.

Quality Assurance

Dynamite Friction manufactures the 830-31112L rotor to meet OEM standards for fitment and performance on BMW vehicles. The rust resistant coating and vented design contribute to durability and consistent braking. Warranty information is available through Dynamite Friction and should be confirmed at the point of purchase.