Centric 121.42105 Disc Brake Rotor - Rear

Overview of Centric C-TEK Standard Disc Brake Rotor 121.42105

The Centric C-TEK Standard Disc Brake Rotor 121.42105 is engineered for reliable braking performance on select Infiniti models. Designed as a vented rotor with a smooth surface, it provides consistent heat dissipation and stable stopping power for vehicles like the Infiniti Q50 and FX50.

• Vented disc brake rotor for improved cooling
• Nominal thickness of 0.787 inches (20.000 mm)
• Discard thickness at 0.709 inches (18.000 mm)
• Overall height of 2.441 inches (62.000 mm)
• Outside diameter of 13.780 inches (350.000 mm)
• 5 lug holes with 0.504 inch (12.800 mm) diameter
• Center hole diameter of 2.677 inches (68.000 mm)
• Mounting bolt hole circle diameter of 4.500 inches (114.300 mm)
• Weight approximately 20.5 lbs (9.32 kgs)
• ABS tone ring not included
• Straight vane style for effective airflow

Product Line Details: C-TEK Standard Disc Brake Rotors

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 providing reliable, direct replacement rotors with consistent dimensions and quality materials. The 121.42105 rotor maintains the precise fit and performance characteristics required for Infiniti vehicles, ensuring compatibility and dependable braking without additional modifications.

Technical Description and Fitment

This vented disc brake rotor features a smooth surface finish and straight vane design to optimize heat dissipation during braking. The rotor’s nominal thickness of 0.787 inches (20.000 mm) and discard thickness of 0.709 inches (18.000 mm) define its service limits, helping maintain safe braking performance. With an outside diameter of 13.780 inches (350.000 mm) and an overall height of 2.441 inches (62.000 mm), it fits specific Infiniti models including FX50, M35h, M37, M56, Q50, Q60, Q70, Q70L, and QX70. The rotor mounts using five lug holes spaced on a 4.500 inch (114.300 mm) bolt circle diameter, with a center hole diameter of 2.677 inches (68.000 mm).

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Restores braking performance on Infiniti Q50 and Q60 models
• Addresses rotor thickness below discard limits to maintain safety
• Improves heat dissipation to reduce brake fade during heavy use
• Compatible with vehicles experiencing uneven rotor wear or noise

Installation Notes and Tips

Ensure the rotor surface is clean and free of debris before installation. Verify the rotor thickness is within nominal specifications and above discard thickness. Use proper torque specifications for lug nuts and mounting bolts to avoid rotor warping. This rotor does not include bearings or an ABS tone ring, so confirm compatibility with your vehicle’s braking system. It is recommended to replace brake pads simultaneously for optimal 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 quality control inspections to ensure dimensional accuracy and material integrity. While specific warranty details are not provided here, Centric typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or Centric directly for warranty terms related to part number 121.42105.