Stoptech 128.44139R Disc Brake Rotor - Front Right

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotors (Part Number 128.44139R) are engineered for Lexus GS300 and IS250 models, providing reliable braking performance with enhanced heat dissipation. These rotors feature a vented design and cross-drilled surface to improve cooling and reduce brake fade under demanding conditions.

• Compatible with Lexus GS300 and IS250
• Part Number: 128.44139R
• Cross-drilled surface for improved heat dissipation
• Vented rotor design for enhanced cooling
• Coated hat finish to resist corrosion
• Floating disc mounting for better thermal expansion
• Overall diameter: 295.8 mm (11.646 inches)
• Nominal thickness: 32.0 mm (1.260 inches)
• Discard thickness: 30.0 mm (1.181 inches)
• 5 lug holes with 114.3 mm bolt circle diameter

Detailed Product Description

The StopTech Sport Cross-Drilled Disc Brake Rotors are designed specifically for Lexus GS300 and IS250 vehicles, ensuring precise fitment and optimal braking performance. These rotors feature a vented construction with straight vanes that promote efficient airflow, helping to maintain lower operating temperatures during heavy braking. The cross-drilled surface pattern aids in dissipating heat and gases generated during braking, reducing the risk of brake fade and improving pedal feel.

The rotor's hat is coated to provide corrosion resistance, extending the service life of the component. With a floating disc mounting design, the rotor can accommodate thermal expansion and contraction, minimizing the risk of warping. The rotor measures 295.8 mm in outside diameter and has a nominal thickness of 32.0 mm, with a discard thickness of 30.0 mm, ensuring it meets OEM specifications for safe operation.

About StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotors line is engineered for drivers seeking improved braking performance through enhanced heat management and durability. This product line incorporates cross-drilled surfaces and vented rotor designs to optimize cooling and reduce brake fade. The rotors are coated for corrosion resistance and designed with floating mounting to accommodate thermal stresses, making them suitable for performance-oriented applications on compatible vehicles like the Lexus GS300 and IS250.

Common Applications and Problem Solving

• Reduces brake fade during aggressive driving or towing
• Improves heat dissipation to prevent rotor warping
• Enhances braking response and pedal feel
• Resists corrosion for longer rotor life
• Maintains OEM fitment and safety standards for Lexus GS300 and IS250

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (30.0 mm) before installation
• Verify compatibility with Lexus GS300 and IS250 models
• Use proper torque specifications for 5-lug mounting with 114.3 mm bolt circle diameter
• Inspect brake pads and calipers during rotor replacement
• Follow manufacturer guidelines for bedding-in new rotors

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 rotors undergo rigorous quality control to ensure durability and consistent performance. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Refer to StopTech or authorized distributors for exact warranty terms.