Centric 121.66055 Disc Brake Rotor - Rear

Reliable Disc Brake Rotor for Chevrolet and GMC Trucks

The Centric C-TEK Standard Disc Brake Rotor 121.66055 is engineered for dependable braking performance on heavy-duty trucks. Designed specifically for Chevrolet and GMC models, this vented rotor ensures consistent heat dissipation and durability under demanding conditions.

• Compatible with Chevrolet Silverado 1500, Silverado 1500 HD, Sierra 1500 HD, Suburban 2500, and Yukon XL 2500
• Vented disc design with straight vane style for improved cooling
• Nominal thickness of 1.146 inches (29.1 mm) and discard thickness of 1.043 inches (26.5 mm)
• Overall height of 3.378 inches (85.8 mm) and outside diameter of 12.992 inches (330 mm)
• Eight stud/lug holes with 0.65 inch (16.5 mm) diameter for secure mounting
• Center hole diameter of 4.614 inches (117.2 mm) and mounting bolt hole circle diameter of 6.5 inches (165.1 mm)
• Solid smooth surface type without ABS tone ring included
• Weight approximately 23 lbs (10.45 kgs)

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 replacement rotors. These rotors are designed to meet or exceed OEM specifications, providing reliable braking performance for heavy-duty trucks like the Chevrolet Silverado 1500 HD and GMC Sierra 1500 HD. The vented rotor design helps maintain optimal operating temperatures, reducing the risk of brake fade during extended use.

Product Details and Specifications

This Centric disc brake rotor features a vented design with straight vanes to enhance airflow and heat dissipation. The rotor's nominal thickness is 1.146 inches (29.1 mm), with a discard thickness of 1.043 inches (26.5 mm), indicating when replacement is necessary. The overall height measures 3.378 inches (85.8 mm), and the outside diameter is 12.992 inches (330 mm), ensuring proper fitment on specified Chevrolet and GMC models. The rotor mounts using eight lug holes, each 0.65 inches (16.5 mm) in diameter, arranged on a 6.5-inch (165.1 mm) bolt circle diameter. This part does not include an ABS tone ring or bearings and features a smooth surface type for consistent pad contact.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Addressing reduced braking efficiency due to rotor thickness below discard limits
• Resolving overheating issues with vented rotor design for better heat management
• Eliminating noise and vibration caused by uneven rotor surfaces
• Ensuring proper fitment and secure mounting on Chevrolet Silverado 1500 and GMC Sierra 1500 HD models

Installation Notes and Tips

• Verify rotor thickness before installation to ensure it meets nominal specifications
• Clean rotor surface and hub mounting area to prevent uneven wear
• Use proper torque specifications on lug nuts 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 maintain optimal braking performance

Quality Assurance and Warranty

Centric 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 121.66055 ensures compatibility with Chevrolet Silverado 1500, Silverado 1500 HD, Sierra 1500 HD, Suburban 2500, and Yukon XL 2500 models, supporting reliable braking performance.