Centric 121.45003 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.45003

The Centric C-TEK Standard Disc Brake Rotor 121.45003 is engineered for reliable braking performance on Mazda RX-7 models. Designed as a vented rotor with a smooth surface, it offers consistent heat dissipation and stable stopping power under normal driving conditions.

• Compatible with Mazda RX-7 vehicles
• Vented disc brake rotor design for improved cooling
• Nominal thickness of 0.709 inches (18.000 mm)
• Discard thickness of 0.669 inches (17.000 mm)
• Outside diameter of 8.957 inches (227.500 mm)
• Overall height of 3.957 inches (100.500 mm)
• 4 stud/lug hole quantity with 1.500 bolt thread pitch
• Smooth surface type for consistent pad contact
• Weight approximately 14 lbs (6.360 kgs)

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric focuses on providing dependable, OE-quality replacement rotors. This product line emphasizes precise fitment and consistent performance, making it suitable for routine maintenance and brake system repairs. The 121.45003 rotor maintains the original equipment specifications for the Mazda RX-7, ensuring proper fit and function without requiring modifications.

Detailed Product Description and Specifications

This Centric disc brake rotor features a vented design with straight vanes to enhance airflow and heat dissipation during braking. The smooth surface finish promotes even brake pad wear and reduces noise. With a nominal thickness of 0.709 inches (18.000 mm) and a discard thickness of 0.669 inches (17.000 mm), this rotor meets the necessary safety standards for replacement. The rotor’s outside diameter measures 8.957 inches (227.500 mm), and it has an overall height of 3.957 inches (100.500 mm). It mounts using 4 lug holes with a bolt thread pitch of 1.500, and the center hole diameter is 2.335 inches (59.300 mm). This rotor does not include an ABS tone ring or bearings, so those components must be sourced separately if needed.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Mazda RX-7
• Addresses brake pulsation caused by uneven rotor surfaces
• Restores proper rotor thickness for safe braking performance
• Improves heat dissipation to reduce brake fade during normal driving
• Eliminates noise and vibration from damaged or scored rotors

Installation Notes and Tips

Ensure the rotor thickness is measured before installation to confirm it meets or exceeds the discard thickness of 0.669 inches (17.000 mm). Clean the rotor surface and hub mounting area to remove rust or debris for proper fitment. Use the correct torque specifications for the 4 mounting bolts with a 1.500 thread pitch. Since this rotor does not include bearings or seals, verify those components are in good condition or replace as necessary. Proper bedding-in of new rotors and pads is recommended to optimize braking performance.

Quality Assurance and Warranty

Centric’s C-TEK Standard Disc Brake Rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. Each rotor undergoes quality control inspections to ensure dimensional accuracy and material integrity. While specific warranty details for part number 121.45003 should be confirmed with the distributor, Centric typically offers limited warranties covering defects in materials and workmanship.