Stoptech 128.34133R Disc Brake Rotor - Rear Right

Overview of StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotors (Part Number 128.34133R) are engineered for BMW models including the 535i, 550i, 640i, 650i, and 740i series. These rotors provide reliable braking performance with a vented, cross-drilled design to enhance heat dissipation and maintain consistent stopping power.

• Cross-drilled surface for improved heat dissipation and reduced brake fade
• Vented rotor design to optimize cooling during heavy braking
• Coated hat finish to resist corrosion and extend rotor life
• Compatible with BMW 535i, 535i GT, 550i, 640i Gran Coupe, 650i xDrive, 740Li xDrive, and other specified models
• Part Number 128.34133R ensures precise fitment and performance

Product Line Details: StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotors line focuses on delivering enhanced braking efficiency through advanced rotor surface technology. The cross-drilled pattern improves ventilation and water dispersion, which is critical for maintaining brake performance under demanding conditions. This product line is designed to meet the needs of performance-oriented drivers who require consistent braking on BMW vehicles such as the 535i and 650i series.

Technical Specifications and Features

This disc brake rotor features a nominal thickness of 0.937 inches (23.8 mm) and a discard thickness of 0.882 inches (22.4 mm), ensuring durability and serviceability. The rotor has an overall height of 2.720 inches (69.1 mm) and an outside diameter of 13.583 inches (345 mm), matching OEM dimensions for proper fitment. The vented rotor design enhances cooling efficiency, while the floating/dih disc mounting and a single miscellaneous hole support optimal rotor stability. The rotor includes five stud/lug holes with a diameter of 0.654 inches (16.6 mm) and a mounting bolt hole circle diameter of 120 mm (4.724 inches). The hat finish is coated to protect against corrosion, and the rotor weighs approximately 19.3 lbs (8.77 kg). Note that this rotor does not include ABS tone rings or bearings.

Applications and Problem Solving

• Compatible with BMW 535i, 535i GT, 550i, 640i Gran Coupe, 650i xDrive, 740Li xDrive, and related models
• Addresses brake fade caused by excessive heat during spirited driving or towing
• Reduces rotor warping and cracking through improved heat dissipation
• Helps maintain consistent brake pedal feel and stopping power
• Prevents corrosion-related rotor damage with coated hat finish

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (0.882 inches) before installation
• Verify compatibility with vehicle model and part number 128.34133R
• Use proper torque specifications for mounting bolts on the 120 mm bolt circle
• Inspect brake pads and calipers for wear during rotor replacement
• Clean rotor surface before installation to remove any protective coatings or debris

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The coated hat finish provides corrosion resistance to extend rotor life. While specific warranty details are not provided here, StopTech products typically come with a limited warranty covering defects in materials and workmanship. It is recommended to consult the product documentation or manufacturer for exact warranty terms.