Centric 121.66056 Disc Brake Rotor - Front

Reliable Disc Brake Rotor for Chevrolet, GMC, and Isuzu Models

The Centric C-TEK Standard Disc Brake Rotor 121.66056 is engineered to provide consistent braking performance for select Chevrolet, GMC, and Isuzu vehicles. Designed specifically for models like the Chevrolet Colorado and GMC Canyon, this rotor meets precise specifications to ensure proper fit and function.

• Compatible with Chevrolet Colorado, GMC Canyon, Isuzu i-280, i-290, i-350, and i-370
• Part number 121.66056 for accurate identification
• Vented rotor design for improved heat dissipation
• Overall diameter of 280 mm (11.024 inches) and nominal thickness of 26.9 mm (1.059 inches)
• Six mounting bolt holes with a 112 mm (4.409 inches) bolt circle diameter
• Smooth surface type for consistent pad contact
• Center hole diameter of 92.1 mm (3.626 inches) for precise hub fitment

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers rotors designed to meet or exceed OEM specifications for standard braking applications. This product line focuses on delivering reliable performance with vented rotor construction to help manage heat buildup during braking. The 121.66056 rotor is part of this line, providing a balance of durability and consistent braking for compatible Chevrolet, GMC, and Isuzu trucks.

Technical Specifications and Features

This vented disc brake rotor features a nominal thickness of 26.9 mm (1.059 inches) and a discard thickness of 25.6 mm (1.008 inches), ensuring a long service life before replacement is necessary. The rotor’s overall height measures 39.9 mm (1.571 inches), and it weighs approximately 15 lbs (6.82 kg), contributing to vehicle stability and braking efficiency. The rotor mounts behind the hub with six bolt holes, each 12 mm in diameter, arranged on a 112 mm bolt circle diameter. The vane style is straight, which aids in effective heat dissipation during braking cycles. 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
• Addressing reduced braking efficiency due to rotor thickness below discard limits
• Eliminating noise and vibration from uneven rotor surfaces
• Restoring proper rotor dimensions for safe braking on Chevrolet Colorado and GMC Canyon models
• Upgrading to a vented rotor design for improved heat management in daily driving conditions

Installation Notes and Tips

• Ensure rotor thickness is measured before installation to confirm discard limits
• Clean mounting surfaces and hub area to prevent rotor runout
• Torque mounting bolts to manufacturer specifications for secure fitment
• Inspect brake pads and replace if worn to maintain optimal rotor contact
• Check for compatibility with vehicle ABS systems as this rotor does not include an ABS tone ring

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 are not provided here, Centric typically offers coverage against defects in materials and workmanship. Refer to Centric’s official documentation for complete warranty information.