Stoptech 127.45078R Disc Brake Rotor - Front Right

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.45078R) are engineered for Mazda 3 vehicles requiring reliable and efficient braking performance. These rotors feature a vented design with cross-drilled and slotted surfaces to enhance heat dissipation and maintain consistent stopping power under demanding conditions.

• Compatible with Mazda 3 models
• Vented disc brake rotor design for improved cooling
• Cross-drilled and slotted surface for enhanced brake pad bite and debris removal
• Coated hat finish to resist corrosion
• Floating disc mounting for better rotor alignment and reduced warping
• Overall diameter: 320 mm (12.598 inches)
• Nominal thickness: 25.000 mm (0.984 inches)
• Discard thickness: 23.000 mm (0.906 inches)
• 5 lug holes with 114.3 mm bolt circle diameter
• Weight approximately 9.56 kg (21.03 lbs)

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to provide enhanced braking performance through improved heat management and pad bite. The combination of cross-drilled holes and precision slots helps to evacuate gases, dust, and water from the rotor surface, reducing brake fade and maintaining consistent pedal feel. The vented rotor design further aids in heat dissipation, making these rotors suitable for spirited driving and daily use on Mazda 3 vehicles.

Technical Specifications and Features

This disc brake rotor features a vented construction with straight vane style to optimize airflow and cooling. The rotor’s overall height measures 48.5 mm (1.909 inches), and it includes a coated hat finish to protect against corrosion and extend service life. The center hole diameter is 72 mm (2.835 inches), and the rotor mounts using a floating disc system to reduce stress and improve durability. It is designed with 5 lug holes, each 13.8 mm (0.543 inches) in diameter, arranged on a 114.3 mm (4.5 inches) bolt circle diameter.

Applications and Problem Solving

• Reduces brake fade during aggressive or repeated braking
• Improves heat dissipation to prevent rotor warping
• Enhances brake pad bite and responsiveness
• Helps remove brake dust and debris for cleaner braking surfaces
• Resists corrosion with coated hat finish for longer rotor life

Installation Notes and Tips

Ensure compatibility with Mazda 3 models before installation. Verify rotor thickness and discard thickness to confirm rotor condition if replacing. Use proper torque specifications for the 5 lug bolts on the 114.3 mm bolt circle. The floating disc mounting requires careful alignment to avoid uneven wear. It is recommended to replace brake pads when installing new rotors to ensure optimal performance.

Quality Assurance and Warranty

StopTech 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 against manufacturing defects. Consult product documentation or manufacturer resources for exact warranty terms.