Stoptech 128.66045L Disc Brake Rotor - Rear Left

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotor 128.66045L is 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, this rotor offers enhanced heat dissipation and consistent stopping power.

• Cross-drilled 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 thickness of 1.181 inches (30.000 mm) with discard thickness at 1.122 inches (28.500 mm)
• Outside diameter of 12.980 inches (329.700 mm) and overall height of 3.760 inches (95.500 mm)

Detailed Product Description

This StopTech Sport Cross-Drilled Disc Brake Rotor (part number 128.66045L) is specifically designed for use on a range of GM vehicles including the Cadillac Escalade, Chevrolet Tahoe, GMC Sierra 1500, and others. The rotor features a vented design with straight vanes that promote airflow to reduce heat buildup during braking. The cross-drilled surface helps to evacuate gases and water, improving brake pad contact and reducing fade under demanding conditions.

The rotor’s coated hat finish provides corrosion resistance, which is essential for maintaining performance and appearance over time. With a 6-lug hole pattern and a mounting bolt hole circle diameter of 5.5 inches (139.700 mm), this rotor fits securely on compatible hubs. The center hole diameter measures 3.094 inches (78.600 mm), ensuring proper alignment during installation.

About StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotors line is designed to offer enhanced braking performance for trucks and SUVs that require reliable heat management and durability. Cross-drilled rotors in this line improve cooling efficiency and help maintain consistent brake pad contact, which is critical for vehicles like the GMC Yukon XL 1500 and Chevrolet Suburban 1500 that often carry heavy loads or tow trailers.

Common Applications and Problem Solving

• Reduces brake fade during extended or heavy braking
• Improves heat dissipation to prevent rotor warping
• Minimizes water and gas buildup on rotor surface for consistent braking
• Addresses corrosion issues with coated hat finish
• Compatible with ABS systems that do not require tone rings

Installation Notes and Tips

• Ensure rotor discard thickness of 1.122 inches (28.500 mm) is not exceeded before replacement
• Verify 6-lug wheel compatibility and bolt circle diameter of 5.5 inches (139.700 mm)
• Clean mounting surfaces and check hub for damage before installation
• Torque lug nuts to manufacturer specifications to avoid rotor distortion
• Brake pads should be inspected and replaced if worn to optimize rotor performance

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. Each rotor undergoes strict quality control to ensure durability and performance. While specific warranty details may vary, StopTech products typically include a limited warranty against defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.