Centric 121.66076 Disc Brake Rotor - Front

Reliable Disc Brake Rotor for Buick, Chevrolet, and GMC Models

The Centric C-TEK Standard Disc Brake Rotor 121.66076 is engineered to meet the braking demands of select Buick, Chevrolet, and GMC vehicles. Designed for durability and consistent performance, this vented rotor ensures effective heat dissipation and smooth braking for models like the Acadia, Blazer, Enclave, Equinox EV, and Traverse.

• Vented disc brake rotor with straight vane design for improved cooling
• Nominal thickness of 1.181 inches (30.000 mm) and discard thickness of 1.063 inches (27.000 mm)
• Overall height of 2.039 inches (51.800 mm) and outside diameter of 12.638 inches (321.000 mm)
• Floating disc mounting with 6 stud/lug holes sized 0.622 inches (15.800 mm)
• Compatible with ABS systems (ABS tone ring not included)
• Center hole diameter of 2.654 inches (67.400 mm) and mounting bolt hole circle diameter of 4.724 inches (120.000 mm)
• Solid smooth surface type for consistent pad contact
• Weight approximately 22.3 lbs (10.12 kgs)

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers reliable replacement rotors designed to meet or exceed OEM specifications. This product line focuses on providing rotors with precise fitment and consistent braking performance, making it suitable for daily driving conditions. The 121.66076 rotor is part of this line, delivering a vented design with straight vanes to optimize heat dissipation and maintain rotor integrity under normal operating temperatures.

Technical Details and Specifications

This Centric rotor features a vented design with 39 straight vanes, which enhances airflow and cooling during braking. The rotor’s nominal thickness is 1.181 inches (30.000 mm), with a discard thickness of 1.063 inches (27.000 mm), indicating when replacement is necessary to maintain safe braking performance. The overall height measures 2.039 inches (51.800 mm), and the outside diameter is 12.638 inches (321.000 mm), ensuring compatibility with the specified vehicle models. The rotor mounts using a floating disc mounting system and includes 6 stud/lug holes with a diameter of 0.622 inches (15.800 mm). The center hole diameter is 2.654 inches (67.400 mm), and the mounting bolt hole circle diameter is 4.724 inches (120.000 mm). The rotor surface is smooth, providing consistent pad contact and braking feel.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Addressing rotor thickness below manufacturer discard limits
• Improving heat dissipation to reduce brake fade during extended use
• Restoring braking performance on Buick Acadia, Chevrolet Blazer, GMC Enclave, Equinox EV, and Traverse
• Ensuring proper fitment with 6-lug wheel configurations

Installation Notes and Tips

Ensure the rotor surface is clean and free of rust or debris before installation. Verify the rotor thickness to confirm it meets or exceeds the nominal thickness specification. Use proper torque specifications for mounting bolts and inspect related brake components such as pads and calipers during installation. This rotor does not include bearings or an ABS tone ring, so verify compatibility with your vehicle’s braking system. Proper bedding-in of new rotors and pads is recommended to achieve optimal braking performance.

Quality Assurance and Warranty

Centric’s C-TEK Standard Disc Brake Rotors are manufactured to meet OEM standards for fit, form, and function. While specific warranty details are not provided here, Centric typically offers coverage against defects in materials and workmanship. Using part number 121.66076 ensures you receive a rotor designed specifically for Buick, Chevrolet, and GMC models including the Acadia, Blazer, Enclave, Equinox EV, and Traverse.