Centric 121.66001 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.66001

The Centric C-TEK Standard Disc Brake Rotor 121.66001 is engineered for reliable braking performance on Chevrolet and GMC heavy-duty trucks. Designed specifically for models like the Chevrolet C30, C3500, GMC G30, P30, and R3500, this vented rotor ensures consistent heat dissipation and durability under demanding conditions.

• Compatible with Chevrolet C30, C3500, GMC G30, P30, P3500, R30, and R3500 models
• Part number 121.66001 for precise identification
• Vented disc brake rotor with smooth surface finish
• Nominal thickness of 1.535 inches (38.990 mm) and discard thickness of 1.465 inches (37.210 mm)
• Outside diameter of 12.508 inches (317.700 mm) for proper fitment
• Eight stud/lug holes with 0.563 inch (14.3 mm) thread diameter
• Mounting bolt hole circle diameter of 6.5 inches (165.100 mm)
• Overall height of 7.677 inches (195.000 mm)
• Straight vane style for effective cooling
• Does not include ABS tone ring or bearings

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 heavy-duty applications. These rotors are designed to meet or exceed OEM specifications, providing consistent braking performance and durability. The 121.66001 rotor features a vented design to improve heat dissipation, which helps maintain braking efficiency during extended use on Chevrolet and GMC trucks.

Technical Details and Specifications

This disc brake rotor has a nominal thickness of 1.535 inches (38.990 mm) and a discard thickness of 1.465 inches (37.210 mm), ensuring it meets safety standards for replacement. The rotor’s outside diameter measures 12.508 inches (317.700 mm), and it features eight stud holes with a thread diameter of 0.563 inches (14.3 mm). The mounting bolt hole circle diameter is 6.5 inches (165.100 mm), and the rotor’s overall height is 7.677 inches (195.000 mm). The smooth surface finish and straight vane style contribute to effective heat dissipation and reduced brake fade. Note that this rotor does not include an ABS tone ring or bearings, so these components must be sourced separately if required.

Applications and Problem Solving

• Replacement for worn or warped rotors on Chevrolet C30, C3500, GMC G30, P30, and R3500 trucks
• Addresses brake pulsation caused by uneven rotor thickness
• Improves braking performance by restoring proper rotor thickness and surface condition
• Helps reduce brake fade during heavy-duty or extended braking
• Suitable for vehicles experiencing rotor overheating or cracking

Installation Notes and Tips

• Verify compatibility with your specific Chevrolet or GMC model before installation
• Inspect hub and mounting surfaces for cleanliness and damage prior to rotor installation
• Ensure proper torque specifications are followed for mounting bolts
• Replace brake pads when installing new rotors to optimize braking performance
• Check for ABS tone ring and bearing requirements as this rotor does not include these components

Quality Assurance and Warranty

Centric manufactures the C-TEK Standard Disc Brake Rotors 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 are not provided here, Centric typically offers coverage against defects in materials and workmanship. Consult product documentation or Centric directly for warranty terms related to part number 121.66001.