Stoptech 127.39034R 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 127.39034R) are engineered for Volvo XC90 models requiring reliable braking performance. These vented rotors feature a slotted and drilled surface designed to improve heat dissipation and maintain consistent stopping power under demanding conditions.

• Cross-drilled and slotted rotor surface for enhanced cooling and debris removal
• Vented design with pillar-style vanes to reduce brake fade
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for improved rotor alignment and performance
• Compatible with Volvo XC90 models requiring 335.5 mm outside diameter rotors

Detailed Product Features and Specifications

This StopTech rotor has a nominal thickness of 30.0 mm (1.181 inches) and a discard thickness of 27.0 mm (1.063 inches), ensuring a durable lifespan before replacement is necessary. The rotor’s overall height measures 51.2 mm (2.016 inches), with a center hole diameter of 68.0 mm (2.677 inches) and a mounting bolt hole circle diameter of 108.0 mm (4.252 inches). It includes five stud/lug holes with a diameter of 16.8 mm (0.661 inches), matching the Volvo XC90’s factory specifications. The rotor weighs approximately 25 lbs (11.36 kg), balancing strength and weight for optimal braking response.

About the StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Line

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to provide enhanced braking performance through improved heat management and surface friction. 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. This product line is suitable for drivers seeking reliable, performance-oriented rotors that meet or exceed OEM fitment standards.

Common Applications and Problem Solving

• Reduces brake fade during extended or aggressive driving
• Improves wet weather braking by channeling water away from the rotor surface
• Minimizes brake dust buildup for cleaner braking components
• Helps maintain consistent brake pedal feel under heavy use
• Prevents rotor warping through enhanced heat dissipation

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (27.0 mm) before installation
• Verify compatibility with Volvo XC90 brake system and mounting specifications
• Use proper torque settings on lug nuts to avoid rotor distortion
• Inspect brake pads for wear and replace if necessary to optimize rotor performance
• Clean rotor surface before installation to remove any protective coatings or debris

Quality Assurance and Warranty

StopTech disc brake rotors are manufactured to meet strict quality standards, ensuring durability and consistent performance. The rotors feature a corrosion-resistant coated hat finish to extend service 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.