Centric 121.66081 Disc Brake Rotor - Rear

Reliable Disc Brake Rotor for Cadillac, Chevrolet, and GMC

The Centric C-TEK Standard Disc Brake Rotor 121.66081 is engineered to provide consistent braking performance for select Cadillac, Chevrolet, and GMC models. Designed with precision, this vented rotor ensures effective heat dissipation and durability for vehicles like the Escalade, Sierra 1500, Silverado 1500, Tahoe, and Yukon.

• Vented disc brake rotor with smooth surface for balanced braking
• Nominal thickness of 0.787 inches (20.000 mm) and discard thickness of 0.709 inches (18.000 mm)
• Overall height of 2.079 inches (52.800 mm) for proper fitment
• Outside diameter measures 13.583 inches (345.000 mm)
• Floating disc mounting with 6 lug holes, 0.626 inches (15.900 mm) diameter each
• Center hole diameter of 3.094 inches (78.600 mm) and mounting bolt hole circle diameter of 5.500 inches (139.700 mm)
• OEM vane count of 57 with straight vane style for efficient cooling
• Weight approximately 18.55 lbs (8.42 kgs)

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers rotors designed to meet or exceed OEM specifications for standard braking applications. This product line focuses on delivering reliable performance and durability with features such as vented construction and smooth surfaces to ensure consistent pad contact and heat management. The 121.66081 rotor is part of this line, providing a direct replacement solution for various full-size trucks and SUVs.

Technical Details and Specifications

This Centric rotor features a vented design with 57 straight vanes, which enhances airflow and heat dissipation during braking. The smooth surface type ensures even pad wear and quiet operation. The floating disc mounting style allows for slight movement to reduce stress and improve rotor longevity. With a center hole diameter of 3.094 inches and a mounting bolt hole circle diameter of 5.500 inches, this rotor is engineered for precise fitment on compatible vehicles. The rotor’s overall height and thickness specifications align with OEM standards to maintain proper brake system geometry.

Compatible Vehicles and Applications

• Cadillac Escalade and Escalade ESV
• Chevrolet Sierra 1500 and Sierra 1500 Limited
• Chevrolet Silverado 1500 and Silverado 1500 LTD
• Chevrolet Tahoe
• GMC Yukon and Yukon XL

This rotor is designed to replace worn or damaged rotors on these models, restoring braking efficiency and safety.

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (0.709 inches) before installation
• Check compatibility with vehicle’s ABS system; this rotor does not include an ABS tone ring
• Use proper torque specifications for the 6 lug nuts (0.626 inch diameter holes)
• Inspect brake pads and calipers during rotor replacement for optimal performance
• Clean rotor surface before installation to remove any protective coatings

Quality Assurance and Warranty

Centric manufactures the C-TEK Standard Disc Brake Rotors to meet strict quality standards, ensuring durability and consistent braking performance. While specific warranty details for part number 121.66081 are not provided here, Centric typically offers limited warranties covering defects in materials and workmanship. Refer to Centric’s official documentation for complete warranty information.