Centric 121.66040 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.66040

The Centric C-TEK Standard Disc Brake Rotor 121.66040 is engineered for reliable braking performance on select GM trucks and SUVs. Designed to meet OEM specifications, this vented rotor provides consistent stopping power for vehicles like the Chevrolet Silverado 1500 and GMC Sierra 1500.

• Part Number: 121.66040
• Vented disc brake rotor with smooth surface
• Outside diameter: 12.008 inches (305.0 mm)
• Nominal thickness: 1.146 inches (29.1 mm)
• Discard thickness: 1.071 inches (27.2 mm)
• Overall height: 2.291 inches (58.2 mm)
• Floating disc mounting type with straight vane style
• 6 lug holes with 0.646 inch (16.4 mm) diameter
• Center hole diameter: 3.098 inches (78.7 mm)
• Mounting bolt hole circle diameter: 5.5 inches (139.7 mm)
• Weight approximately 19.75 lbs (8.98 kgs)
• ABS tone ring not included
• Bearings not included

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers rotors manufactured to meet or exceed OEM standards for fit, form, and function. This product line focuses on providing dependable, direct replacement rotors with smooth surfaces and vented designs to optimize heat dissipation. The 121.66040 rotor is part of this line, ensuring compatibility and performance for GM vehicles requiring vented rotors with floating disc mounting.

Detailed Product Description

This Centric disc brake rotor features a vented design with straight vanes to enhance cooling during braking, reducing the risk of brake fade. The smooth surface finish supports even pad wear and consistent braking feel. With a nominal thickness of 1.146 inches and a discard thickness of 1.071 inches, this rotor maintains structural integrity and safety throughout its service life. The floating disc mounting allows for slight movement to accommodate thermal expansion and improve rotor longevity. The rotor is designed with six lug holes and a mounting bolt hole circle diameter of 5.5 inches, matching factory specifications for proper fitment on compatible vehicles.

Compatible Vehicles and Applications

• Cadillac Escalade, Escalade ESV, Escalade EXT
• Chevrolet Astro, Avalanche 1500, Express 1500, Express 2500, Silverado 1500, Silverado 1500 Classic, Silverado 1500 HD, Suburban 1500, Tahoe
• GMC Sierra 1500, Sierra 1500 Classic, Sierra 1500 HD, Yukon, Yukon XL 1500, Safari, Savana 1500, Savana 2500

Common Issues Addressed by This Rotor

• Brake rotor warping causing vibration during braking
• Excessive brake noise due to uneven rotor surface
• Reduced braking performance from worn or thin rotors
• Overheating and brake fade on heavy-duty GM trucks and SUVs
• Uneven pad wear caused by rotor surface imperfections

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (1.071 inches) before installation
• Clean rotor surface to remove any protective coating before mounting
• Check compatibility with vehicle make and model, including lug pattern and center hole diameter
• Use proper torque specifications on lug nuts to avoid rotor distortion
• Inspect brake pads and replace if worn to ensure optimal rotor performance

Quality Assurance and Warranty

Centric manufactures the C-TEK Standard Disc Brake Rotors to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details for part number 121.66040 are not provided here, Centric typically offers limited warranties covering defects in materials and workmanship. It is recommended to consult the product packaging or Centric's official documentation for exact warranty terms.