Centric 121.34080 Disc Brake Rotor - Rear

Overview of Centric C-TEK Standard Disc Brake Rotor 121.34080

The Centric C-TEK Standard Disc Brake Rotor 121.34080 is engineered for reliable braking performance on select BMW models. Designed as a vented rotor with a smooth surface, it provides consistent stopping power and heat dissipation for vehicles like the BMW 330i and 335i xDrive.

• Compatible with BMW 330i, 330xi, 335d, 335i, 335is, 335i xDrive, 335xi, and X1 models
• Part number 121.34080 for precise identification
• Vented disc brake rotor design for improved cooling
• Nominal thickness of 0.862 inches (21.900 mm) with discard thickness at 0.803 inches (20.400 mm)
• Overall height of 2.646 inches (67.200 mm) and outside diameter of 13.228 inches (336.000 mm)
• Five stud/lug holes with a diameter of 0.583 inches (14.800 mm) and 4.724 inches (120.000 mm) bolt circle diameter
• Center hole diameter of 2.953 inches (75.000 mm) for proper fitment
• Floating disc mounting with one miscellaneous hole and straight vane style for effective ventilation
• Weight approximately 18.2 lbs (8.27 kgs)

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers rotors designed to meet or exceed OEM specifications for standard braking applications. This product line focuses on delivering reliable, consistent braking performance with quality materials and precise manufacturing. The 121.34080 rotor fits within this line, providing vented rotor construction and smooth surface finish to maintain effective heat dissipation and braking stability for BMW vehicles.

Detailed Product Description

This Centric disc brake rotor features a vented design with straight vanes that enhance airflow and cooling during braking, reducing the risk of brake fade. The smooth surface type ensures even pad contact and wear. With a nominal thickness of 0.862 inches and a discard thickness of 0.803 inches, this rotor maintains structural integrity throughout its service life. The overall height and outside diameter are engineered to match OEM specifications for proper fitment and performance. The rotor mounts using a floating disc mounting system and includes five lug holes arranged on a 120 mm bolt circle diameter, ensuring compatibility with the specified BMW models.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Addressing reduced braking efficiency due to rotor thickness below discard limits
• Resolving noise or vibration issues related to rotor surface irregularities
• Improving heat dissipation to prevent brake fade on BMW 330i and 335i xDrive
• Ensuring proper rotor fitment for models including BMW X1 and 335xi

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 rotor seating
• Use proper torque specifications on lug nuts to avoid rotor warping
• Check compatibility with ABS systems; this rotor does not include an ABS tone ring
• Inspect brake pads and replace if worn to maintain optimal braking performance

Quality Assurance and Warranty

Centric manufactures the C-TEK Standard Disc Brake Rotors to meet strict quality standards, ensuring durability and consistent performance. 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 exact warranty terms.