Stoptech 128.66057L Disc Brake Rotor - Front Left

Overview of StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotor 128.66057L is engineered for reliable braking performance on select Cadillac, Chevrolet, and GMC trucks and SUVs. Designed to meet the demands of vehicles like the Chevrolet Silverado 1500 and GMC Sierra 1500, this rotor offers enhanced heat dissipation and consistent stopping power.

• Cross-drilled surface for improved heat dissipation and reduced brake fade
• Vented rotor design to maintain optimal operating temperatures
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better rotor alignment and reduced stress
• Compatible with 6-lug wheel configurations and specific bolt patterns

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

The StopTech Sport Cross-Drilled Disc Brake Rotors line focuses on performance-oriented rotors featuring cross-drilled surfaces and vented designs. These rotors are engineered to provide improved cooling and consistent braking under demanding conditions. The 128.66057L rotor benefits from this design philosophy, offering a coated hat finish and floating disc mounting to enhance durability and fitment on vehicles such as the Cadillac Escalade and GMC Yukon XL.

Technical Specifications and Features

This disc brake rotor has a nominal thickness of 1.181 inches (30.000 mm) and a discard thickness of 1.102 inches (28.000 mm), ensuring a clear service life indicator. The rotor’s outside diameter measures 12.992 inches (330.000 mm), with an overall height of 2.165 inches (55.000 mm). It features a vented design with straight vanes to optimize airflow and cooling. The rotor includes six stud/lug holes with a diameter of 0.633 inches (16.080 mm) and a mounting bolt hole circle diameter of 5.531 inches (140.500 mm). The center hole diameter is 3.091 inches (78.500 mm), and the hat ID measures 6.980 inches (177.300 mm). Weighing approximately 25.5 lbs (11.59 kgs), this rotor balances durability and performance without added weight. Note that this rotor does not include ABS tone rings or bearings.

Compatible Vehicles and Applications

This StopTech rotor 128.66057L is compatible with a range of full-size trucks and SUVs, including:

• Cadillac Escalade, Escalade ESV, Escalade EXT, and XTS
• Chevrolet Avalanche, Silverado 1500 (including Classic and LD), Suburban 1500, Tahoe, and Express 1500
• GMC Sierra 1500 (Classic and Limited), Yukon, Yukon XL, Yukon XL 1500, Savana 1500, and Cheyenne

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup during towing or heavy braking
• Uneven rotor wear leading to vibration or noise during braking
• Corrosion and rust on rotor hats reducing service life
• Insufficient cooling in stock rotors under demanding driving conditions
• Fitment challenges on 6-lug wheel setups requiring precise bolt pattern matching

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness before installation
• Verify compatibility with vehicle make, model, and year prior to purchase
• Use proper torque specifications on mounting bolts to avoid rotor warping
• Inspect brake pads and calipers for wear when replacing rotors
• Clean rotor surface with brake cleaner before installation to remove any protective coatings

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The coated hat finish provides corrosion resistance to extend rotor 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 product documentation or manufacturer for exact warranty terms.