Stoptech 128.45085L Disc Brake Rotor - Rear Left

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotor 128.45085L is engineered for Mazda 6 vehicles requiring reliable braking performance. Designed with precision, this solid rotor features a cross-drilled surface to enhance heat dissipation and maintain consistent stopping power under demanding conditions.

• Compatible with Mazda 6 models
• Part number: 128.45085L
• Solid disc brake rotor with cross-drilled surface
• Coated hat finish for corrosion resistance
• Overall diameter: 277.5 mm (10.925 inches)
• Nominal thickness: 10.0 mm (0.394 inches)
• Discard thickness: 8.0 mm (0.315 inches)
• Floating disc mounting design
• 5 lug holes with 114.3 mm bolt circle diameter

Detailed Product Features and Specifications

This StopTech rotor is a solid type with a cross-drilled surface pattern that improves ventilation and helps reduce brake fade by allowing heat and gases to escape more efficiently. The rotor’s coated hat finish provides added protection against rust and corrosion, extending the service life of the component. With an overall height of 39.5 mm (1.555 inches) and a center hole diameter of 68.1 mm (2.681 inches), it is designed to fit precisely on Mazda 6 brake assemblies. The rotor includes five stud/lug holes, each 13.3 mm (0.524 inches) in diameter, arranged on a 114.3 mm (4.5 inches) bolt circle diameter, ensuring secure mounting. The floating disc mounting design allows for slight movement to reduce stress and improve braking consistency.

About StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotors line focuses on delivering enhanced braking performance through improved heat dissipation and durability. Cross-drilled rotors like the 128.45085L are designed to maintain consistent brake feel and reduce the risk of brake fade during spirited driving or heavy braking scenarios. This product line is suitable for drivers seeking a balance between everyday usability and performance-oriented braking upgrades.

Common Applications and Problem Solving

• Replaces worn or warped rotors on Mazda 6 models
• Addresses brake fade caused by excessive heat buildup
• Improves braking response and pedal feel
• Reduces corrosion-related rotor damage with coated hat finish
• Eliminates vibration and noise from uneven rotor surfaces

Installation Notes and Tips

• Ensure compatibility with Mazda 6 brake system before installation
• Check rotor thickness and discard limits during replacement
• Use proper torque specifications for lug nuts on the 5-lug pattern
• Inspect brake pads and hardware for wear when installing new rotors
• Perform a bed-in procedure after installation to optimize rotor and pad contact

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet strict quality standards for durability and performance. The 128.45085L rotor undergoes rigorous testing to ensure dimensional accuracy and material integrity. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.