Centric 121.66077 Disc Brake Rotor - Rear

Overview of Centric C-TEK Standard Disc Brake Rotor 121.66077

The Centric C-TEK Standard Disc Brake Rotor 121.66077 is engineered for reliable braking performance on heavy-duty Chevrolet and GMC trucks. Designed specifically for models like the Silverado 2500 HD and Sierra 3500 HD, this vented rotor ensures consistent heat dissipation and durability under demanding conditions.

• Vented disc brake rotor with smooth surface finish
• Outside diameter of 360 mm (14.173 inches) for precise fitment
• Nominal thickness of 34.1 mm (1.343 inches) with discard thickness at 32.5 mm (1.280 inches)
• Eight lug holes with 16.2 mm (0.638 inches) diameter for secure mounting
• Compatible with Chevrolet Silverado 2500, 3500 and GMC Sierra 2500 HD, 3500 HD, and Suburban 3500 HD

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers a balance of quality and value for heavy-duty truck applications. These rotors feature vented designs with straight vanes to optimize cooling and reduce brake fade. The smooth surface type supports even pad wear and consistent braking performance, making them suitable for demanding Chevrolet and GMC truck models requiring dependable stopping power.

Detailed Product Description and Specifications

This Centric rotor (part number 121.66077) is a vented disc brake rotor with an overall height of 119.2 mm (4.693 inches) and a center hole diameter of 127 mm (5 inches). It includes eight stud/lug holes arranged on a 180 mm (7.087 inches) bolt circle diameter, ensuring compatibility with specified Chevrolet and GMC heavy-duty trucks. The rotor’s nominal drum diameter is 226.24 mm (8.907 inches), and it weighs approximately 16.9 kg (37.25 lbs). The floating disc mounting design and two miscellaneous holes contribute to proper alignment and heat dissipation. This rotor does not include an ABS tone ring or bearings.

Applications and Common Issues Addressed

• Replacement for worn or warped rotors on Chevrolet Silverado 2500 HD and 3500 HD
• Restores braking efficiency on GMC Sierra 2500 HD and Suburban 3500 HD
• Solves issues related to brake noise and vibration caused by rotor surface irregularities
• Addresses rotor thickness below discard limits to maintain safe braking
• Improves heat dissipation to reduce brake fade during heavy towing or hauling

Installation Notes and Tips

• Verify rotor thickness before installation; discard thickness is 32.5 mm (1.280 inches)
• Ensure mounting surfaces are clean and free of debris for proper fitment
• Torque lug nuts to manufacturer specifications to avoid rotor warping
• Check compatibility with vehicle ABS system as this rotor does not include an ABS tone ring
• Inspect brake pads and replace if worn to ensure optimal rotor performance

Quality Assurance and Warranty

Centric’s C-TEK Standard Disc Brake Rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. While specific warranty details for part number 121.66077 should be confirmed with the supplier, Centric typically offers coverage against defects in materials and workmanship to ensure long-term reliability for Chevrolet and GMC heavy-duty truck owners.