Centric 121.45099 Disc Brake Rotor - Front

Reliable Disc Brake Rotor for Mazda 3 and CX-30

The Centric C-TEK Standard Disc Brake Rotor 121.45099 is engineered to meet the braking demands of Mazda 3 and CX-30 models. Designed with precision, this vented rotor offers consistent performance and durability for everyday driving conditions.

• Compatible with Mazda 3 and Mazda CX-30 vehicles
• Part number 121.45099 for exact fitment
• Vented disc design with 50 broken vanes for improved heat dissipation
• Nominal thickness of 0.984 inches (25.000 mm) and discard thickness of 0.906 inches (23.000 mm)
• Overall height of 1.830 inches (46.500 mm) and outside diameter of 11.610 inches (294.900 mm)
• Floating disc mounting with a center hole diameter of 2.673 inches (67.900 mm)
• 5 stud/lug holes with a diameter of 0.511 inches (13.000 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 is designed to provide reliable, OEM-quality replacement rotors that meet or exceed factory specifications. This product line focuses on delivering rotors with precise dimensions and vented designs to ensure proper heat management and braking performance. The 121.45099 rotor is part of this line, offering a vented rotor with broken vane style to maintain optimal cooling for Mazda 3 and CX-30 vehicles.

Product Details and Specifications

This disc brake rotor features a vented design with 50 broken vanes, which enhances airflow and heat dissipation during braking. The rotor’s nominal thickness is 0.984 inches (25.000 mm), with a discard thickness of 0.906 inches (23.000 mm), indicating when the rotor should be replaced to maintain safe braking performance. The overall height measures 1.830 inches (46.500 mm), and the outside diameter is 11.610 inches (294.900 mm), ensuring a precise fit for the specified Mazda models. The rotor mounts using a floating disc mounting system and includes a center hole diameter of 2.673 inches (67.900 mm) and a mounting bolt hole circle diameter of 4.511 inches (114.600 mm). It has 5 stud/lug holes with a diameter of 0.511 inches (13.000 mm), matching factory specifications. The smooth surface type promotes even brake pad wear and consistent stopping power.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Mazda 3 and CX-30
• Addresses brake pulsation caused by uneven rotor surfaces
• Improves heat dissipation to reduce brake fade during extended use
• Restores proper rotor thickness for safe braking performance
• Eliminates noise and vibration related to damaged rotors

Installation Notes and Tips

Ensure the rotor surface is clean and free of rust or debris before installation. Verify the rotor thickness is above the discard thickness specification of 0.906 inches (23.000 mm) to maintain safety standards. Use proper torque specifications for mounting bolts and inspect related brake components such as pads and calipers during replacement. This rotor does not include bearings or an ABS tone ring, so confirm compatibility with your vehicle’s braking system.

Quality Assurance and Warranty

Centric’s C-TEK Standard Disc Brake Rotors are manufactured to meet OEM standards for fit, form, and function. While specific warranty details are not provided here, Centric products typically come with a limited warranty against defects in materials and workmanship. Always consult product documentation or the manufacturer for complete warranty information.