Centric 121.34055 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.34055

The Centric C-TEK Standard Disc Brake Rotor 121.34055 is engineered for reliable braking performance on BMW 530i and 540i models. Designed as a vented rotor with a smooth surface, it offers consistent heat dissipation and durability for everyday driving conditions.

• Compatible with BMW 530i and 540i
• Part number: 121.34055
• Vented disc brake rotor with smooth surface
• Outside diameter: 12.756 inches (324.0 mm)
• Nominal thickness: 1.181 inches (30.0 mm)
• Discard thickness: 1.118 inches (28.4 mm)
• Overall height: 2.906 inches (73.8 mm)
• Floating disc mounting with straight vane style
• 5 lug holes with 4.724 inch (120 mm) bolt circle diameter
• ABS tone ring not included

Detailed Product Description

This Centric C-TEK Standard Disc Brake Rotor 121.34055 is a vented rotor designed to improve heat dissipation during braking, reducing the risk of brake fade. The smooth surface finish ensures consistent pad contact and braking performance. With an outside diameter of 12.756 inches (324 mm) and a nominal thickness of 1.181 inches (30 mm), this rotor meets OEM specifications for BMW 530i and 540i models. The discard thickness is 1.118 inches (28.4 mm), indicating the minimum safe thickness before replacement is necessary. The rotor features a floating disc mounting system and straight vane style for efficient airflow and cooling. It includes five lug holes with a 4.724 inch (120 mm) bolt circle diameter and a center hole diameter of 3.110 inches (79 mm). This rotor does not include an ABS tone ring or bearings.

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 standards for fit, form, and function. This product line focuses on providing reliable braking performance with quality materials and precise manufacturing. The 121.34055 rotor is part of this line, delivering consistent braking characteristics suitable for BMW 530i and 540i vehicles requiring vented rotors with smooth surfaces.

Common Applications and Issues Addressed

• Replacement for worn or warped rotors on BMW 530i and 540i
• Resolves brake pulsation caused by uneven rotor surfaces
• Addresses reduced braking efficiency due to rotor thickness below discard limits
• Improves heat dissipation to prevent brake fade during normal driving
• Suitable for vehicles without ABS tone ring requirements

Installation Notes and Tips

• Verify rotor thickness before installation; do not install below discard thickness of 1.118 inches (28.4 mm)
• Ensure proper torque on lug nuts to manufacturer specifications
• Check compatibility with vehicle’s brake caliper and mounting hardware
• Clean rotor surface before installation to remove any protective coatings
• Inspect brake pads and replace if worn to ensure optimal braking performance

Quality Assurance and Warranty

Centric C-TEK Standard Disc Brake Rotors are manufactured to meet strict quality standards for durability and performance. While specific warranty details for part number 121.34055 should be confirmed with the supplier, Centric generally offers limited warranties covering defects in materials and workmanship. This rotor is engineered to provide consistent braking performance for BMW 530i and 540i models when installed and maintained according to manufacturer guidelines.