Stoptech 128.34071R Disc Brake Rotor - Front Right

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotors (Part Number 128.34071R) are engineered for BMW models including the 535i, 545i, 550i, 645Ci, and 650i. Designed to provide consistent braking performance, these rotors feature a vented and cross-drilled surface to enhance heat dissipation and reduce brake fade under demanding conditions.

• Cross-drilled surface for improved heat dissipation
• Vented rotor design with straight vane style for efficient cooling
• Coated vented hat finish to resist corrosion
• Floating disc mounting for better rotor alignment and performance
• Compatible with BMW 535i, 545i, 550i, 645Ci, and 650i models
• Part Number: 128.34071R

Product Line Details: 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 reliable braking under high stress. The cross-drilled surface pattern helps to evacuate gases and debris from the braking surface, while the vented design with straight vanes promotes airflow to maintain optimal rotor temperature. This product line balances durability and performance, making it suitable for both street and light track use on compatible BMW vehicles.

Technical Specifications and Features

These rotors have a nominal thickness of 30.000 mm (1.181 inches) and a discard thickness of 28.400 mm (1.118 inches), ensuring a long service life before replacement is necessary. The overall diameter measures 348.000 mm (13.701 inches), with an overall height of 77.100 mm (3.035 inches). The rotors feature a coated vented hat to resist corrosion and maintain structural integrity. The center hole diameter is 79.000 mm (3.110 inches), and the mounting bolt hole circle diameter is 120.000 mm (4.724 inches) with five stud/lug holes sized at 14.600 mm (0.575 inches). The floating disc mounting design allows for slight movement to reduce stress and improve braking consistency.

Common Applications and Problem Solving

• Reduces brake fade during aggressive driving or heavy braking
• Improves heat dissipation to prevent rotor warping
• Minimizes brake dust and gas buildup on the rotor surface
• Enhances braking response and pedal feel for BMW 535i, 545i, 550i, 645Ci, and 650i
• Provides corrosion resistance with coated vented hats for longer rotor life

Installation Notes and Tips

• Ensure compatibility with your BMW model before installation
• Inspect brake pads and replace if worn to maintain optimal rotor performance
• Torque mounting bolts to manufacturer specifications to avoid rotor distortion
• Check rotor thickness regularly and replace when reaching discard thickness
• Floating rotor design requires proper alignment during installation for best results

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet strict quality standards for durability and performance. The coated vented hat finish provides corrosion resistance, extending the rotor’s service life. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Always refer to the manufacturer’s warranty documentation for complete coverage information.