Centric 121.34052 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.34052

The Centric C-TEK Standard Disc Brake Rotor 121.34052 is engineered for reliable braking performance on select BMW models. Designed as a vented rotor with a smooth surface, it provides consistent heat dissipation and stable stopping power for vehicles like the BMW 320i, 330Ci, 330i, 330xi, and Z4.

• Compatible with BMW 320i, 330Ci, 330i, 330xi, and Z4 models
• Part number 121.34052 for precise identification
• Vented disc brake rotor design for improved cooling
• Overall diameter of 12.795 inches (325 mm) and overall height of 2.075 inches (52.7 mm)
• Nominal thickness of 0.984 inches (25 mm) with discard thickness at 0.921 inches (23.4 mm)
• Floating disc mounting with straight vane style for efficient airflow
• Five stud/lug holes with a 4.724 inch (120 mm) bolt circle diameter
• Center hole diameter of 3.110 inches (79 mm) for proper hub fitment
• Weight approximately 20.32 lbs (9.24 kgs)
• ABS tone ring not included; bearings 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 everyday driving conditions. This product line focuses on delivering rotors that meet or exceed OEM specifications, ensuring proper fit and function. The 121.34052 rotor exemplifies this approach with its vented design and smooth surface, providing dependable braking performance for BMW vehicles without additional features like ABS tone rings or bearings.

Technical Details and Specifications

This vented disc brake rotor features a smooth surface type that promotes even pad wear and consistent braking feel. The rotor’s nominal thickness is 0.984 inches (25 mm), with a discard thickness of 0.921 inches (23.4 mm), indicating when replacement is necessary to maintain safety. The overall height measures 2.075 inches (52.7 mm), and the outside diameter is 12.795 inches (325 mm), matching the OEM dimensions for the specified BMW models. The floating disc mounting and straight vane style enhance heat dissipation during braking, reducing the risk of rotor warping under normal driving conditions.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 320i, 330Ci, 330i, 330xi, and Z4
• Addresses brake pulsation caused by uneven rotor surfaces
• Restores proper rotor thickness to maintain braking efficiency
• Improves heat dissipation to reduce brake fade during extended use
• Ensures correct fitment with OEM bolt pattern and center hole dimensions

Installation Notes and Tips

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

Quality Assurance and Warranty

Centric’s C-TEK Standard Disc Brake Rotors are manufactured to meet or exceed OEM standards for fit, form, and function. While specific warranty details for part number 121.34052 are not provided here, Centric typically offers limited warranties covering defects in materials and workmanship. It is recommended to consult the product packaging or Centric’s official documentation for exact warranty terms.