Stoptech 128.33138R Disc Brake Rotor - Front Right

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotors (Part Number 128.33138R) are engineered for Audi and Porsche vehicles, including models like the Audi A5, A6, A6 Quattro, A7 Quattro, and Porsche Macan, Q5, S4, and S5. These rotors provide reliable braking performance with a vented, cross-drilled design to enhance heat dissipation and reduce brake fade.

• Cross-drilled surface for improved heat dissipation and water evacuation
• Vented rotor design with pillar-style vanes for efficient cooling
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better thermal expansion management
• Compatible with 5-lug wheel setups with 112 mm bolt circle diameter
• Nominal thickness of 30.000 mm and discard thickness of 28.000 mm
• Outside diameter of 345 mm (13.583 inches) for precise fitment
• Weight approximately 25.5 lbs (11.56 kgs) per rotor

About StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotors line is designed to meet the demands of performance-oriented drivers who require consistent braking under aggressive conditions. The cross-drilled pattern helps to reduce heat buildup and improve wet-weather braking by allowing gases and moisture to escape. The vented design with pillar vanes enhances airflow, maintaining rotor temperature within optimal ranges. This product line balances durability and performance, making it suitable for both street and light track use on compatible Audi and Porsche models.

Technical Details and Fitment

These rotors feature a floating disc mounting system that accommodates thermal expansion, reducing the risk of warping during heavy braking. The coated hat finish protects against rust and corrosion, preserving the rotor’s structural integrity. With a center hole diameter of 68 mm (2.677 inches) and a 5-lug bolt pattern with a 112 mm (4.409 inches) bolt circle diameter, these rotors are designed specifically for select Audi and Porsche vehicles, including the Audi A5, A6, A6 Quattro, A7 Quattro, and Porsche Macan, Q5, S4, and S5. The nominal thickness of 30 mm and discard thickness of 28 mm ensure long service life and safe replacement intervals.

Common Applications and Problem Solving

• Reduces brake fade during aggressive driving or towing
• Improves braking performance in wet or humid conditions
• Minimizes rotor warping caused by heat buildup
• Prevents corrosion on rotor hats for extended durability
• Ensures consistent pedal feel and stopping power on compatible Audi and Porsche models

Installation Notes and Tips

• Verify compatibility with your vehicle’s make, model, and year before installation
• Inspect brake pads and replace if worn to ensure optimal rotor performance
• Follow manufacturer torque specifications for mounting bolts
• Ensure rotors are clean and free of oil or debris before installation
• Bleed brake system after installation to maintain proper hydraulic pressure

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet strict quality standards for performance and durability. Each rotor undergoes rigorous testing to ensure dimensional accuracy and material integrity. While specific warranty details may vary, StopTech products typically include coverage against manufacturing defects. Consult product documentation or the manufacturer for exact warranty terms related to part number 128.33138R.