Centric 121.66018 Disc Brake Rotor - Front or Rear

Reliable Disc Brake Rotor for Chevrolet and GMC Trucks

The Centric C-TEK Standard Disc Brake Rotor 121.66018 is engineered for dependable braking performance on Chevrolet P30 and GMC P3500 models. Designed to meet OEM specifications, this vented rotor ensures consistent heat dissipation and smooth braking under demanding conditions.

• Compatible with Chevrolet P30 and GMC P3500
• Part number 121.66018 for precise fitment
• Vented disc design with straight vane style for improved cooling
• Nominal thickness of 1.535 inches (39.000 mm) and discard thickness of 1.465 inches (37.210 mm)
• Overall height of 4.378 inches (111.200 mm) and outside diameter of 13.740 inches (349.000 mm)
• 10 mounting bolt holes with a bolt circle diameter of 7.248 inches (184.100 mm)
• Smooth surface type for consistent pad contact

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers rotors manufactured to meet or exceed OEM standards, providing reliable braking performance for a variety of vehicle applications. This product line focuses on delivering rotors with precise dimensions and quality materials, ensuring compatibility and durability for vehicles like the Chevrolet P30 and GMC P3500. The 121.66018 rotor is part of this line, featuring vented construction and a smooth surface to maintain effective braking and heat management.

Product Details and Specifications

This disc brake rotor features a vented design with straight vanes that promote efficient airflow to reduce heat buildup during braking. The rotor's nominal thickness is 1.535 inches (39.000 mm), with a discard thickness of 1.465 inches (37.210 mm), indicating when replacement is necessary to maintain safe braking performance. The overall height measures 4.378 inches (111.200 mm), and the outside diameter is 13.740 inches (349.000 mm), ensuring proper fitment on the specified truck models. It includes 10 mounting bolt holes with a diameter of 0.669 inches (17.000 mm) arranged on a bolt circle diameter of 7.248 inches (184.100 mm). The center hole diameter is 5.504 inches (139.800 mm), and the rotor mounts behind the hub. This rotor does not include an ABS tone ring or bearings.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Restores braking efficiency on Chevrolet P30 and GMC P3500 trucks
• Addresses rotor thickness below discard limits to maintain safety
• Improves heat dissipation to reduce brake fade during heavy use
• Ensures proper fitment with 10-bolt mounting for secure installation

Installation Notes and Tips

• Verify rotor thickness before installation to ensure it meets nominal specifications
• Clean mounting surfaces to prevent uneven rotor seating
• Torque mounting bolts to manufacturer specifications for safety
• Check for compatibility with existing brake pads and hardware
• Inspect hub and wheel bearings during installation as bearings are not included

Quality Assurance and Warranty

Centric's C-TEK Standard Disc Brake Rotors are manufactured to meet OEM quality standards, ensuring reliable performance and durability. While specific warranty details for part number 121.66018 are not provided here, Centric typically offers coverage against defects in materials and workmanship. Always consult product documentation or manufacturer resources for complete warranty information.