Centric 121.66052 Disc Brake Rotor - Rear

Reliable Disc Brake Rotor for Select GM and Isuzu Models

The Centric C-TEK Standard Disc Brake Rotor 121.66052 offers a precise replacement solution for various Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab vehicles. Designed to meet OEM specifications, this vented rotor ensures consistent braking performance for models like the Trailblazer, Envoy, and Ascender.

• Part Number: 121.66052
• Brand: Centric, Brand Line: C-TEK Standard Disc Brake Rotors
• Vented disc brake rotor with smooth surface finish
• Outside diameter: 12.795 inches (325.0 mm)
• Nominal thickness: 0.787 inches (20.0 mm), discard thickness: 0.728 inches (18.5 mm)
• Overall height: 3.346 inches (85.0 mm)
• 6 lug holes with 0.520 inch (13.2 mm) diameter
• Mounting bolt hole circle diameter: 5.0 inches (127.0 mm)
• Center hole diameter: 3.098 inches (78.7 mm)
• Weight approximately 18 lbs (8.18 kgs)
• ABS tone ring not included

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric is engineered to provide dependable, direct-fit replacements that meet or exceed OEM standards. This product line focuses on delivering rotors with precise dimensions and quality materials to ensure proper fitment and consistent braking performance. The 121.66052 rotor exemplifies this approach with its vented design and smooth surface, suitable for a range of GM and Isuzu SUVs and trucks.

Product Details and Specifications

This vented disc brake rotor features a nominal thickness of 0.787 inches (20.0 mm) and a discard thickness of 0.728 inches (18.5 mm), ensuring safe and effective braking until replacement is necessary. The rotor’s outside diameter measures 12.795 inches (325.0 mm), with an overall height of 3.346 inches (85.0 mm). It includes six lug holes sized at 0.520 inches (13.2 mm) diameter arranged on a 5.0-inch (127.0 mm) bolt circle. The center hole diameter is 3.098 inches (78.7 mm). The rotor is designed with straight vanes for efficient heat dissipation and does not include an ABS tone ring or bearings.

Compatible Vehicles and Applications

• Buick Rainier
• Chevrolet Trailblazer, Trailblazer EXT, SSR
• GMC Envoy, Envoy XL, Envoy XUV
• Isuzu Ascender, Bravada
• Oldsmobile models compatible with specified dimensions
• Saab 9-7x

Common Issues Addressed by This Rotor

• Brake pulsation or vibration due to warped rotors
• Reduced braking efficiency from worn or thin rotors
• Overheating caused by insufficient rotor ventilation
• Uneven brake pad wear linked to rotor surface irregularities
• Noise or squealing related to rotor surface condition

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 0.728 inches before installation. Clean the rotor surface to remove any protective coatings or contaminants. Verify proper alignment of the 6 lug holes and mounting bolt circle diameter of 5.0 inches. Since this rotor does not include bearings or an ABS tone ring, reuse existing components or replace separately if necessary. Proper torque specifications should be followed to avoid rotor warping.

Quality Assurance and Warranty

Centric’s C-TEK Standard Disc Brake Rotors are manufactured to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details for part number 121.66052 should be confirmed with the supplier, Centric typically offers coverage against defects in materials and workmanship under normal use conditions.