Stoptech 127.34072R Disc Brake Rotor - Rear Right

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.34072R) are engineered for BMW models including the 535i, 545i, 550i, 645Ci, and 650i. Designed to enhance braking performance, these rotors feature a vented, slotted, and cross-drilled surface to improve heat dissipation and maintain consistent stopping power under demanding conditions.

• Cross-drilled and slotted surface for improved heat dissipation and debris removal
• Vented rotor design with straight vane style for enhanced cooling
• Coated vented hat finish to resist corrosion
• Precision fit with 5 lug holes and 120 mm bolt circle diameter
• Nominal outside diameter of 345 mm (13.583 inches) and overall height of 63.2 mm (2.488 inches)

Detailed Product Features and Specifications

This StopTech rotor is a vented disc brake rotor with a solid construction designed to fit specific BMW models such as the 535i, 545i, 550i, 645Ci, and 650i. The rotor features a cross-drilled and slotted surface type that helps reduce brake fade by allowing gases and dust to escape, improving pad bite and overall braking consistency. The vented design with straight vanes promotes airflow through the rotor, aiding in heat dissipation during heavy braking.

The rotor’s nominal thickness is 24.0 mm (0.945 inches) with a discard thickness of 22.4 mm (0.882 inches), ensuring durability and longevity. The coated hat finish provides corrosion resistance, maintaining the rotor’s structural integrity over time. The rotor includes 5 stud/lug holes with a diameter of 14.5 mm (0.571 inches) and a mounting bolt hole circle diameter of 120 mm (4.724 inches), ensuring a precise fit for the specified BMW models.

About StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to offer enhanced braking performance for sport and performance vehicles. This product line focuses on improving heat management and brake pad contact through cross-drilled holes and slots, which help maintain consistent braking under aggressive driving conditions. The vented rotor design further supports cooling, making these rotors suitable for both street and light track use on compatible BMW models.

Common Applications and Problem Solving

• Reduces brake fade during high-performance or spirited driving
• Improves brake pad cleaning and debris removal for consistent contact
• Enhances heat dissipation to prevent rotor warping
• Addresses corrosion issues with coated vented hat finish
• Provides reliable fitment for BMW 535i, 545i, 550i, 645Ci, and 650i models

Installation Notes and Tips

• Ensure rotor discard thickness (22.4 mm) is not exceeded before installation
• Verify compatibility with vehicle lug pattern: 5 lug holes, 120 mm bolt circle diameter
• Use proper torque specifications for mounting bolts to avoid rotor damage
• Inspect brake pads and calipers during installation for optimal performance
• Clean rotor surface before installation to remove any protective coatings or residues

Quality Assurance and Warranty

StopTech disc brake rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The coated vented hat finish helps resist corrosion, extending rotor life. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Always consult the product documentation or manufacturer for exact warranty terms.