Dynamite Friction 830-31151L Disc Brake Rotor - Front Left

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31151L) is engineered for BMW X3 and X4 models. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW X3 and X4 models
• Directional slotted and drilled surface for improved brake pad bite and cooling
• Vented rotor design to reduce heat buildup
• Rust resistant coating for extended durability
• Plain disc finish with Geospec silver grey hat finish
• 5 bolt holes with 16.65 mm diameter and 120 mm bolt circle diameter
• Nominal thickness of 28 mm and discard thickness of 26.4 mm
• Overall height and rotor height of 73.5 mm
• Outside diameter of 328 mm for precise fitment

Detailed Product Description

The DFC Geoperformance Rotor - Drilled and Slotted by Dynamite Friction is designed specifically for BMW X3 and X4 vehicles requiring reliable braking components. The rotor’s vented construction helps dissipate heat more effectively during braking, reducing the risk of brake fade under demanding conditions. The directional surface pattern combines drilled holes and slots to improve water and debris evacuation, enhancing braking consistency in wet or dusty environments.

With a nominal thickness of 28 mm and a discard thickness of 26.4 mm, this rotor maintains structural integrity throughout its service life. The rotor’s 328 mm outside diameter and 75 mm center hole diameter ensure proper alignment and fitment. The rust resistant coating and Geospec silver grey hat finish provide corrosion protection and a clean appearance.

DFC Geoperformance Rotor - Drilled and Slotted Product Line

The DFC Geoperformance Rotor - Drilled and Slotted line focuses on performance-oriented rotors that balance durability and heat management. This product line features vented rotors with directional drilled and slotted surfaces, designed to optimize braking efficiency and pad life. The 830-31151L rotor exemplifies these characteristics, tailored for BMW X3 and X4 applications.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on BMW X3 and X4
• Improves braking performance in wet or high-heat conditions
• Reduces brake fade during extended or aggressive driving
• Helps prevent rust and corrosion on braking surfaces
• Restores proper rotor thickness and surface condition for safe braking

Installation Notes and Tips

Ensure the rotor is compatible with your specific BMW X3 or X4 model year before installation. Clean the hub surface thoroughly to prevent runout and ensure proper rotor seating. Use the correct torque specifications for the 5 lug bolts with 16.65 mm diameter and 120 mm bolt circle diameter. Inspect brake pads for wear and replace if necessary to maintain optimal braking performance.

Quality Assurance

Dynamite Friction manufactures the 830-31151L rotor to meet OEM specifications for fit and function. The rust resistant coating and precision machining contribute to long service life. While no specific warranty information is provided, Dynamite Friction products are generally produced under strict quality control standards to ensure reliability and safety.