Stoptech 227.44129R Disc Brake Rotor - Front Right

StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 227.44129R) are engineered for Toyota 4Runner, FJ Cruiser, and Tacoma models. Designed to enhance braking performance, these rotors feature a vented, slotted, and cross-drilled surface to improve heat dissipation and reduce brake fade under demanding conditions.

• Cross-drilled and slotted rotor surface for improved cooling and debris removal
• Vented rotor design to enhance heat dissipation
• Floating disc mounting for better rotor alignment and reduced warping
• Compatible with Toyota 4Runner, FJ Cruiser, and Tacoma models
• Nominal thickness of 1.102 inches (28.000 mm) with discard thickness at 1.024 inches (26.000 mm)
• Overall rotor diameter of 12.559 inches (319.000 mm)
• 6 stud/lug hole configuration with 0.571 inch (14.500 mm) diameter holes
• Weight approximately 18.5 lbs (8.41 kgs)

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

The StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to provide a balance between performance and durability. Featuring a vented rotor design combined with cross-drilled and slotted surfaces, this product line aims to improve braking consistency by reducing heat buildup and evacuating gases and debris. The floating disc mounting system helps maintain rotor alignment, which is critical for preventing uneven wear and rotor warping over time.

Technical Specifications and Features

This disc brake rotor has a nominal thickness of 1.102 inches (28.000 mm) and a discard thickness of 1.024 inches (26.000 mm), ensuring a long service life before replacement is necessary. The rotor’s overall height measures 2.657 inches (67.500 mm), and it features a 12.559 inch (319.000 mm) outside diameter, making it compatible with specific Toyota models. The rotor includes six stud/lug holes with a diameter of 0.571 inches (14.500 mm) and a mounting bolt hole circle diameter of 5.500 inches (139.700 mm). The vane style is straight, which supports efficient airflow and cooling during braking.

Applications and Problem Solving

• Improves braking performance on Toyota 4Runner, FJ Cruiser, and Tacoma vehicles
• Reduces brake fade during heavy or repeated braking
• Helps prevent rotor warping caused by excessive heat
• Enhances debris and gas evacuation to maintain consistent brake pad contact
• Supports safe and reliable braking under off-road or towing conditions

Installation Notes and Tips

Installation of the StopTech Select Sport Cross-Drilled & Slotted Disc Brake Rotors (227.44129R) requires proper torque specifications for the 6 lug nuts and careful alignment of the floating disc mounting system. Ensure the rotor surface is clean and free of contaminants before installation. It is recommended to inspect brake pads and hardware during rotor replacement to maintain optimal braking performance. ABS tone ring and bearings are not included with this rotor and should be reused or replaced separately if necessary.

Quality Assurance and Warranty

StopTech rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The materials and design focus on durability and consistent braking performance. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Always refer to the manufacturer’s warranty documentation for complete terms and conditions.