Centric 121.33155 Disc Brake Rotor - Rear

Reliable Disc Brake Rotor for Audi Models

The Centric C-TEK Standard Disc Brake Rotor 121.33155 is engineered to provide consistent braking performance for various Audi vehicles. Designed specifically for models like the Audi A8 Quattro, Q7, and S7 Sportback, this vented rotor ensures effective heat dissipation and durability under demanding driving conditions.

• Vented disc brake rotor with smooth surface for balanced braking
• Outside diameter of 13.780 inches (350 mm) for precise fitment
• Nominal thickness of 1.102 inches (28 mm) with discard thickness at 1.024 inches (26 mm)
• Floating disc mounting design for improved rotor alignment
• Five stud/lug holes with 0.602 inch (15.3 mm) diameter for secure installation
• Overall height of 1.429 inches (36.3 mm) and center hole diameter of 2.677 inches (68 mm)
• OEM vane count of 39 with straight vane style for optimal cooling
• Hat ID measures 5.752 inches (146.1 mm) to match factory specifications

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 fit, form, and function. This product line focuses on providing reliable braking components with precise engineering, including vented rotors that enhance heat dissipation and maintain structural integrity. The 121.33155 rotor is part of this line, ensuring compatibility and performance for Audi vehicles requiring standard replacement rotors.

Technical Details and Compatibility

This Centric rotor features a vented design with 39 straight vanes, which helps reduce heat buildup during braking, minimizing the risk of warping. The smooth surface finish supports consistent pad contact and braking efficiency. With a floating disc mounting and a mounting bolt hole circle diameter of 4.409 inches (112 mm), it fits securely on compatible Audi models. The rotor weighs approximately 21.6 lbs (9.8 kg), balancing durability and weight considerations.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Audi A8 Quattro and Q7
• Restores braking performance on Audi S6 and S7 Sportback models
• Addresses brake pulsation caused by uneven rotor thickness
• Improves heat dissipation to prevent brake fade during extended use
• Compatible upgrade for Audi SQ7 and SQ8 requiring vented rotors

Installation Notes and Tips

Ensure the rotor surface is clean and free of debris before installation. Verify the rotor thickness is above the discard thickness of 1.024 inches (26 mm) to maintain safety standards. This rotor does not include bearings or an ABS tone ring, so confirm compatibility with your vehicle’s braking system. Proper torque specifications should be followed when securing the rotor to the hub using the five lug holes.

Quality Assurance and Warranty

Centric manufactures the C-TEK Standard Disc Brake Rotors to meet strict quality control standards, ensuring reliable performance and durability. While specific warranty details for part number 121.33155 are not provided here, Centric typically offers coverage against defects in materials and workmanship. Always consult product documentation or manufacturer resources for warranty information.