Dynamite Friction 830-31075L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31075L) is engineered for BMW models including the 525xi, 528i xDrive, 528xi, 530xi, and 535i xDrive. This vented disc brake rotor combines drilled and slotted surface features to enhance braking performance and heat dissipation.

• Compatible with BMW 525xi, 528i xDrive, 528xi, 530xi, and 535i xDrive
• Part number 830-31075L
• Vented disc brake rotor with drilled and slotted surface
• Directional brake surface design for optimized performance
• Rust resistant coating for extended durability
• Geospec silver grey hat finish
• Overall diameter of 320 mm and height of 86.1 mm
• Nominal thickness of 19.9 mm with discard thickness at 18.4 mm
• 5 bolt holes with 14.8 mm diameter and 120 mm bolt circle diameter

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 surface is both drilled and slotted, which helps to evacuate gases, dust, and water, maintaining consistent braking performance. The directional brake surface ensures proper rotation alignment for optimal efficiency. The rotor’s nominal thickness is 19.9 mm, with a discard thickness of 18.4 mm, indicating when replacement is necessary to maintain safety and performance. The rotor’s hat is finished in Geospec silver grey, providing corrosion resistance along with a rust resistant coating applied to the entire rotor surface. The rotor measures 320 mm in outside diameter and 86.1 mm in height, with a center hole diameter of 75 mm. It features 5 bolt holes with a diameter of 14.8 mm and a bolt circle diameter of 120 mm, matching the specifications required for the listed BMW models.

About the DFC Geoperformance Rotor - Drilled and Slotted Line

The DFC Geoperformance Rotor - Drilled and Slotted product line by Dynamite Friction is designed to offer enhanced braking performance through advanced rotor surface technology. The drilled and slotted design improves heat dissipation and debris removal, which is critical for maintaining brake efficiency in both everyday driving and more demanding conditions. This line is engineered to meet the precise fitment and performance requirements of specific vehicle models, including various BMW xDrive and xi variants.

Applications and Problem Solving

• Improves braking response and reduces brake fade during high-stress driving
• Helps prevent rotor warping caused by excessive heat buildup
• Reduces brake dust accumulation on pads and wheels
• Maintains consistent braking performance in wet or humid conditions
• Extends rotor lifespan with rust resistant coating and durable finish

Installation Notes and Tips

Ensure the rotor is installed with the directional surface oriented correctly according to the vehicle’s rotation direction. Verify that the bolt hole pattern (5 holes, 14.8 mm diameter, 120 mm bolt circle) matches the vehicle hub. Check rotor thickness before installation; replace if below the discard thickness of 18.4 mm. Properly torque all lug nuts to manufacturer specifications to avoid rotor damage or uneven wear.

Quality Assurance and Warranty

Dynamite Friction manufactures the 830-31075L rotor to meet strict quality standards, including rust resistant coatings and precise machining tolerances. While specific warranty details are not provided, Dynamite Friction products typically adhere to industry standards for durability and performance. Always consult the vehicle manufacturer’s guidelines and Dynamite Friction’s warranty policy for coverage information.