Centric 121.99091 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.99091

The Centric C-TEK Standard Disc Brake Rotor 121.99091 is engineered for reliable braking performance on Chevrolet Sonic models. Designed as a vented rotor with a smooth surface, it offers consistent heat dissipation and durability for everyday driving conditions.

• Compatible with Chevrolet Sonic vehicles
• Vented disc brake rotor design for improved cooling
• Nominal thickness of 0.945 inches (24.000 mm)
• Discard thickness at 0.827 inches (21.000 mm)
• Overall height of 1.787 inches (45.400 mm)
• Outside diameter measuring 10.079 inches (256.000 mm)
• Floating disc mounting type
• Four stud/lug holes with 0.492 inch (12.500 mm) diameter
• Center hole diameter of 2.362 inches (60.000 mm)
• Mounting bolt hole circle diameter of 100.000 mm (3.937 inches)
• Weight approximately 12.9 lbs (5.86 kgs)
• ABS tone ring not included

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers a balance of quality and value for standard braking applications. This product line focuses on delivering rotors with precise fitment and consistent performance, making it suitable for routine maintenance and replacement on vehicles like the Chevrolet Sonic. The 121.99091 rotor maintains strict manufacturing tolerances to ensure proper fit and function within the braking system.

Detailed Product Description

This Centric disc brake rotor features a vented design that enhances heat dissipation during braking, reducing the risk of brake fade under normal driving conditions. The smooth surface finish supports even pad wear and quiet operation. With a nominal thickness of 0.945 inches and a discard thickness of 0.827 inches, this rotor provides a clear service life indicator to maintain safe braking performance. The floating disc mounting style allows for slight movement to accommodate thermal expansion and improve rotor longevity. The rotor’s dimensions, including a 10.079 inch outside diameter and a 1.787 inch overall height, are engineered to match Chevrolet Sonic specifications precisely.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Chevrolet Sonic models
• Addresses brake pulsation caused by uneven rotor surfaces
• Improves braking consistency by restoring proper rotor thickness
• Reduces noise and vibration associated with damaged rotors
• Supports safe vehicle operation by maintaining correct rotor dimensions

Installation Notes and Tips

• Verify rotor thickness before installation to ensure it meets minimum discard thickness
• Clean rotor surface and hub mounting area to prevent uneven contact
• Use proper torque specifications on mounting bolts to avoid rotor distortion
• Inspect brake pads and replace if worn to optimize braking performance
• Check for compatibility with ABS systems; this rotor does not include an ABS tone ring

Quality Assurance and Warranty

Centric manufactures the C-TEK Standard Disc Brake Rotors to meet or exceed OEM specifications. Each rotor undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details for part number 121.99091 are not provided here, Centric typically offers coverage against defects in materials and workmanship. Consult product documentation or Centric directly for warranty terms.