Stoptech 127.66045R Disc Brake Rotor - Rear Right

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.66045R) are engineered for reliable braking performance on select GM trucks and SUVs. Designed to meet the demands of vehicles like the Chevrolet Silverado 1500 and Cadillac Escalade, these rotors offer enhanced heat dissipation and consistent stopping power.

• Cross-drilled and slotted surface for improved heat and gas dissipation
• Vented rotor design with straight vane style for efficient cooling
• Coated hat finish to resist corrosion and extend rotor life
• Compatible with 6-lug wheel configurations and 5.5-inch bolt circle diameter
• Nominal outside diameter of 12.98 inches (329.7 mm) and overall height of 3.76 inches (95.5 mm)

Product Line Details

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line focuses on performance-oriented rotors that combine cross-drilled holes and precision slots. This design helps reduce brake fade by improving airflow and removing debris from the pad surface. The vented rotor construction with straight vanes further enhances cooling efficiency, making this product line suitable for heavy-duty applications and vehicles requiring consistent braking under load.

Technical Specifications and Features

These disc brake rotors feature a nominal thickness of 1.181 inches (30.0 mm) and a discard thickness of 1.122 inches (28.5 mm), ensuring durability and safety margins for wear. The rotors do not include ABS tone rings or bearings, and are designed for floating/dih disc mounting. The center hole diameter measures 3.094 inches (78.6 mm), and the rotor weighs approximately 20.25 lbs (9.2 kg). The stud/lug hole diameter is 0.65 inches (16.5 mm), with six holes arranged on a 5.5-inch (139.7 mm) bolt circle diameter.

Compatible Vehicles and Applications

• Cadillac Escalade, Escalade ESV, Escalade EXT
• Chevrolet Avalanche 1500, Silverado 1500, Suburban 1500, Tahoe
• GMC Sierra 1500, Yukon, Yukon XL 1500, Express 1500, Savana 1500

This rotor is designed specifically for these GM models, ensuring proper fitment and optimal braking performance.

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup during heavy braking
• Uneven pad wear due to poor rotor surface design
• Corrosion and rust on rotor hats reducing lifespan
• Reduced braking efficiency from gas and dust accumulation on pads
• Overheating in vented rotors leading to warping or cracking

Installation Notes and Tips

• Verify rotor thickness before installation to ensure it meets minimum discard thickness
• Ensure compatibility with vehicle’s lug pattern and bolt circle diameter
• Clean rotor surface before mounting to remove any protective coatings or debris
• Use proper torque specifications on lug nuts to avoid rotor warping
• Check for ABS tone ring requirements as this rotor does not include one

Quality Assurance and Warranty

StopTech rotors are manufactured to meet or exceed OEM specifications for durability and performance. The coated hat finish provides corrosion resistance to extend service life. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Always consult the manufacturer or authorized distributor for exact warranty terms.