Centric 121.99039 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.99039

The Centric C-TEK Standard Disc Brake Rotor 121.99039 is engineered to provide reliable braking performance for a range of vehicles. Designed as a vented, floating disc brake rotor, it offers consistent heat dissipation and durability for everyday driving conditions.

• Vented rotor design for improved heat dissipation
• Floating disc mounting for enhanced rotor alignment
• Overall diameter of 10.228 inches (259.8 mm)
• Nominal thickness of 0.866 inches (22.0 mm) with discard thickness at 0.780 inches (19.8 mm)
• Smooth surface type for consistent pad contact
• Four stud/lug holes with 0.531 inch (13.5 mm) diameter
• Center hole diameter of 2.402 inches (61.0 mm)
• Mounting bolt hole circle diameter of 3.937 inches (100.0 mm)
• Weight approximately 12.7 lbs (5.77 kgs)
• ABS tone ring not included

Details on C-TEK Standard Disc Brake Rotors Product Line

The C-TEK Standard Disc Brake Rotors line by Centric focuses on delivering dependable, OE-quality replacement rotors. This product line emphasizes precise fitment and consistent performance, making it suitable for drivers seeking a direct replacement rotor that meets factory specifications. The 121.99039 rotor exemplifies this approach with its vented design and floating mounting, which help maintain braking efficiency and rotor longevity.

Technical Specifications and Features

This disc brake rotor features a vented design that enhances cooling by allowing air to flow between the rotor surfaces, reducing the risk of brake fade during extended use. The floating disc mounting system helps accommodate slight misalignments and thermal expansion, contributing to smoother braking operation. With a smooth surface type, the rotor ensures even pad wear and reliable stopping power. The rotor’s dimensions, including a 10.228-inch outside diameter and a nominal thickness of 0.866 inches, align with specific vehicle requirements to maintain proper brake system function.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Addressing rotor thickness below discard limits to restore braking safety
• Improving heat dissipation in vehicles experiencing brake fade
• Resolving uneven pad wear due to rotor surface irregularities
• Upgrading to a vented rotor for enhanced thermal management

Installation Notes and Tips

Ensure the rotor mounting surface and hub are clean and free of debris before installation. Verify the rotor thickness is within nominal specifications and above discard thickness limits. Use proper torque specifications for mounting bolts to avoid rotor warping. Since this rotor does not include bearings or an ABS tone ring, confirm compatibility with your vehicle’s brake system components. It is recommended to replace brake pads simultaneously to ensure optimal braking performance.

Quality Assurance and Warranty

Centric provides quality-tested rotors manufactured to meet or exceed OEM standards. The C-TEK Standard Disc Brake Rotors line undergoes rigorous inspection to ensure dimensional accuracy and material integrity. While specific warranty details for part number 121.99039 should be confirmed with the vehicle manufacturer or distributor, Centric typically offers limited warranties covering defects in materials and workmanship.