Dynamite Friction 631-31088R Disc Brake Rotor - Rear Right

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31088R) is engineered for BMW 125i and 128i models. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW 125i and 128i models
• Vented disc brake rotor with drilled and slotted surface
• Nominal thickness of 20 mm and discard thickness of 18.4 mm
• Overall diameter of 300 mm and height of 76.2 mm
• Zinc silver hat finish with rust-resistant coating
• 5 bolt holes with 14.5 mm diameter and 120 mm bolt circle diameter
• Directional brake surface for optimized braking efficiency

Product Line Details: DFC Brake Rotor - Drilled and Slotted - Silver

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that combine drilled holes and slots to improve water and gas evacuation during braking. This design helps maintain consistent brake pad contact and reduces brake fade under demanding conditions. The zinc silver hat finish provides corrosion resistance, extending rotor life, especially in environments prone to rust.

Technical Specifications and Features

This disc brake rotor is vented to allow better airflow and heat dissipation, which is critical for maintaining braking performance during extended use. The rotor’s nominal thickness is 20 mm, with a discard thickness of 18.4 mm, indicating when replacement is necessary. The rotor measures 300 mm in outside diameter and 76.2 mm in overall height, fitting precisely on BMW 125i and 128i models. The 5 bolt holes, each 14.5 mm in diameter, are arranged on a 120 mm bolt circle diameter, ensuring proper fitment. The directional slotted and drilled surface enhances braking by channeling away debris and heat, while the zinc silver hat finish with rust-resistant coating protects against corrosion.

Applications and Problem Solving

• Improves braking performance for BMW 125i and 128i vehicles
• Reduces brake fade during high-temperature conditions
• Helps prevent rust and corrosion on the rotor surface
• Enhances water and gas evacuation for consistent brake pad contact
• Maintains structural integrity with vented design for heat dissipation

Installation Notes and Tips

Ensure the rotor is installed on compatible BMW 125i or 128i models matching the 5-lug, 120 mm bolt circle pattern. Verify the rotor thickness before installation; replace if below the discard thickness of 18.4 mm. Clean the rotor surface to remove any protective coatings or debris before mounting. Proper torque specifications should be followed for the 14.5 mm bolt holes to ensure secure fitment and optimal performance.

Quality Assurance

Dynamite Friction manufactures the 631-31088R rotor to meet OEM standards for fit and function. The rust-resistant zinc silver hat finish extends rotor life by protecting against corrosion. While no specific warranty information is provided, the product is designed to maintain consistent braking performance and durability when installed and maintained according to manufacturer guidelines.