Stoptech 128.34048R Disc Brake Rotor - Front Right

Overview of StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotor 128.34048R is engineered for BMW models including the 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4. Designed to enhance braking performance, this vented rotor features a cross-drilled surface for improved heat dissipation and consistent stopping power.

• Cross-drilled surface for enhanced cooling and brake fade resistance
• Vented rotor design with straight vane style for efficient heat management
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for improved rotor alignment and reduced stress
• Compatible with BMW 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4 models
• Part number 128.34048R ensures precise fitment and quality

StopTech Sport Cross-Drilled Disc Brake Rotors Product Line

The StopTech Sport Cross-Drilled Disc Brake Rotors line is designed to provide enhanced braking performance through advanced rotor surface technology. The cross-drilled pattern improves ventilation and heat dissipation, which helps maintain consistent brake pad contact and reduces the risk of brake fade during demanding driving conditions. This product line is ideal for drivers seeking reliable, performance-oriented rotors that maintain durability and fitment accuracy.

Technical Specifications and Features

This disc brake rotor features a nominal thickness of 0.866 inches (22.000 mm) and a discard thickness of 0.803 inches (20.400 mm), ensuring a long service life before replacement is necessary. The rotor has an outside diameter of 11.811 inches (300.000 mm) and an overall height of 2.028 inches (51.500 mm). It includes a 5-lug stud pattern with a mounting bolt hole circle diameter of 120.000 mm (4.724 inches) and stud/lug hole diameters of 0.575 inches (14.600 mm). The rotor is vented with straight vanes to optimize airflow and cooling. The hat is coated to resist corrosion, and the rotor weighs approximately 15.14 lbs (6.88 kgs). This rotor does not include ABS tone rings or bearings.

Applications and Problem Solving

• Improves brake cooling to reduce fade during spirited driving or heavy braking
• Helps maintain consistent braking performance under high thermal stress
• Reduces rotor warping and extends rotor lifespan with vented design
• Prevents corrosion on the rotor hat with a durable coated finish
• Ensures precise fitment and compatibility with specific BMW models for safe operation

Installation Notes and Tips

• Verify compatibility with your BMW model (323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, Z4) before installation
• Inspect brake pads and calipers for wear and replace if necessary during rotor installation
• Ensure proper torque specifications on mounting bolts to avoid rotor misalignment
• Check rotor thickness and discard limits regularly to maintain optimal braking performance
• Professional installation is recommended for safety and performance assurance

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet strict quality standards for durability and performance. The coated hat finish provides corrosion resistance to extend rotor life. While specific warranty details are not provided here, StopTech products typically come with manufacturer-backed warranties covering defects in materials and workmanship. Always consult the product documentation or manufacturer for exact warranty terms.