Centric 121.45090 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.45090

The Centric C-TEK Standard Disc Brake Rotor 121.45090 is engineered for reliable braking performance on select Fiat and Mazda vehicles. Designed specifically for models like the Fiat 124 Spider and Mazda MX-5 Miata, this vented rotor offers consistent heat dissipation and smooth braking response.

• Compatible with Fiat 124 Spider, Mazda MX-5, and MX-5 Miata
• Vented disc brake rotor with pillar vane style for enhanced cooling
• Nominal thickness of 0.866 inches (22.000 mm) and discard thickness of 0.787 inches (20.000 mm)
• Overall height of 1.732 inches (44.000 mm) and outside diameter of 11.024 inches (280.000 mm)
• Floating disc mounting with 4 stud/lug holes, 0.516 inches (13.100 mm) diameter each
• Smooth surface type without ABS tone ring included

Details on C-TEK Standard Disc Brake Rotors

The C-TEK Standard Disc Brake Rotors line by Centric is designed to meet or exceed OEM specifications for standard replacement rotors. This product line focuses on delivering dependable braking performance with precise fitment and consistent quality. The 121.45090 rotor features a vented design with pillar-style vanes, which improves airflow and heat dissipation during braking. This helps maintain rotor integrity and reduces the risk of brake fade under normal driving conditions.

Technical Specifications and Features

This rotor has a nominal thickness of 0.866 inches (22.000 mm) and a discard thickness of 0.787 inches (20.000 mm), ensuring it meets safety standards for replacement parts. The overall height measures 1.732 inches (44.000 mm), and the outside diameter is 11.024 inches (280.000 mm), matching the exact dimensions required for proper fitment on compatible vehicles. The rotor uses a floating disc mounting system and includes 4 stud/lug holes with a diameter of 0.516 inches (13.100 mm). The center hole diameter is 2.165 inches (55.000 mm), and the mounting bolt hole circle diameter is 3.937 inches (100.000 mm). The rotor weighs approximately 13.3 lbs (6.04 kgs), balancing durability and weight for optimal performance.

Applications and Problem Solving

• Replacement for worn or warped rotors on Fiat 124 Spider and Mazda MX-5 Miata
• Addresses brake pulsation and vibration issues caused by uneven rotor surfaces
• Improves heat dissipation to reduce brake fade during extended use
• Restores proper rotor thickness to maintain safe braking distances
• Compatible with vehicles lacking ABS tone ring requirements

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness before installation
• Clean rotor surface to remove any protective coatings or debris
• Verify correct rotor orientation with floating disc mounting system
• Torque lug nuts to manufacturer specifications for secure fitment
• Inspect brake pads and calipers during rotor replacement for optimal system performance

Quality Assurance and Warranty

Centric manufactures the C-TEK Standard Disc Brake Rotors to meet strict quality control standards, ensuring consistent performance and durability. While specific warranty details for part number 121.45090 are not provided here, Centric typically offers limited warranties covering defects in materials and workmanship. Users should consult product documentation or Centric directly for warranty terms related to this rotor.