Centric 121.66083 Disc Brake Rotor - Rear

Rear Disc Brake Rotor for Heavy-Duty Dual Rear Wheel Trucks

Centric C-TEK Standard Disc Brake Rotor 121.66083 is a rear vented rotor built for heavy-duty braking applications. It is listed for 2020-2024 Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD dual rear wheel models, giving buyers a direct-fit option for rear brake service on these trucks.

C-TEK Standard Rotor Features

• Centric C-TEK Standard Disc Brake Rotors line for everyday service and value-focused repairs
• Rear position rotor for Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD DRW applications
• Vented rotor design with smooth surface type
• Outside diameter: 13.976 in. / 355.000 mm
• Nominal thickness: 1.575 in. / 40.000 mm
• Discard thickness: 1.516 in. / 38.500 mm
• 8 lug holes with 7.087 in. / 180.000 mm bolt circle diameter
• Center hole diameter: 5.669 in. / 144.000 mm
• OEM vane count: 47 with straight vane style
• ABS tone ring not included; bearings not included

Product Details

Centric Part Number 121.66083 is a rear disc brake rotor engineered for heavy-duty dual rear wheel trucks that need consistent braking performance and service life. The rotor uses a vented construction, smooth friction surface, and straight vane layout to support heat management in demanding stop-and-go and load-carrying conditions. This rotor is listed for 2020-2021 Chevrolet Silverado 3500 HD, rear, heavy duty dual rear wheels, and 2020-2021 GMC Sierra 3500 HD, rear, heavy duty dual rear wheels, plus 2022-2024 Chevrolet Silverado 3500 HD and 2022-2024 GMC Sierra 3500 HD rear DRW applications. This part cross-references Carlson 41359 for the same application.

What This Rotor Helps Address

• Rear brake pulsation from worn or below-spec rotor thickness
• Reduced braking consistency on heavy-duty DRW trucks
• Heat buildup during repeated stops and towing use
• Rotor replacement needs during brake pad service
• Fitment-specific rear brake repair on Silverado 3500 HD and Sierra 3500 HD models

Installation Notes and Tips

Verify rotor dimensions, hub fit, and lug pattern before installation. Clean the hub mounting surface thoroughly to help prevent runout-related brake noise or pedal vibration. Replace pads and inspect calipers, slides, and wheel bearings during rotor service to complete the repair correctly. Confirm rear dual rear wheel fitment for your exact model year before ordering Centric 121.66083.

Quality Assurance

Centric positions the C-TEK Standard Disc Brake Rotors line as a practical replacement choice for broad service use, balancing performance, service life, and value. The 121.66083 rotor follows the listed OE-style dimensions and application data for 2020-2024 Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD rear brake service.