Centric 121.66009 Disc Brake Rotor - Front

Reliable Disc Brake Rotor for Cadillac, Chevrolet, and GMC Vehicles

The Centric C-TEK Standard Disc Brake Rotor 121.66009 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, Tahoe, and Yukon.

• Part Number: 121.66009
• Brand Line: C-TEK Standard Disc Brake Rotors
• Vented disc brake rotor with straight vane design
• Outside diameter: 11.606 inches (294.8 mm)
• Nominal thickness: 1.287 inches (32.7 mm)
• Discard thickness: 1.215 inches (30.86 mm)
• Overall height: 2.622 inches (66.6 mm)
• Center hole diameter: 3.098 inches (78.7 mm)
• Mounting bolt hole circle diameter: 5.5 inches (139.7 mm)
• 6 stud/lug holes with 0.61 inch (15.5 mm) diameter
• Floating disc mounting type
• Weight: 16 lbs (7.27 kgs)
• Smooth surface type without ABS tone ring

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 performance, making it suitable for a range of trucks and SUVs including the Chevrolet K1500, K2500, and Cadillac Escalade. The 121.66009 rotor features a vented design with straight vanes to optimize cooling and reduce brake fade during extended use.

Product Details and Specifications

This Centric disc brake rotor is vented with straight vanes, which helps maintain optimal operating temperatures by allowing air to flow through the rotor. The rotor’s nominal thickness of 1.287 inches (32.7 mm) and discard thickness of 1.215 inches (30.86 mm) provide clear service limits for safe operation. The overall height of 2.622 inches (66.6 mm) and outside diameter of 11.606 inches (294.8 mm) ensure proper fitment on compatible vehicles. The rotor mounts using a floating disc mounting system and includes six stud holes with a 5.5-inch bolt circle diameter, matching factory specifications for secure installation.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Cadillac Escalade and Chevrolet Tahoe
• Restores braking performance on GMC Yukon and Chevrolet K1500 Suburban
• Addresses brake pulsation and noise caused by uneven rotor surfaces
• Improves heat dissipation to reduce brake fade during towing or heavy loads
• Suitable for vehicles experiencing rotor thickness below discard limits

Installation Notes and Tips

• Verify rotor thickness before installation to ensure it meets minimum discard thickness
• Clean rotor surface and hub mounting area to prevent uneven contact
• Use proper torque specifications for lug nuts to avoid rotor warping
• Check compatibility with vehicle ABS system; 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 OEM standards for fit, form, and function. Each rotor undergoes rigorous quality control to ensure durability and consistent braking performance. While specific warranty details for part number 121.66009 should be confirmed with the distributor, Centric typically offers a limited warranty against defects in materials and workmanship.