Centric 121.33121 Disc Brake Rotor - Rear

Overview of Centric C-TEK Standard Disc Brake Rotor 121.33121

The Centric C-TEK Standard Disc Brake Rotor 121.33121 is engineered for reliable braking performance on Audi TT and TT Quattro models. Designed to meet OEM specifications, this vented disc brake rotor ensures consistent stopping power and durability under various driving conditions.

• Compatible with Audi TT and TT Quattro vehicles
• Part number: 121.33121
• Vented rotor design with pillar-style vanes for improved heat dissipation
• Nominal thickness of 0.866 inches (22.000 mm) and discard thickness of 0.787 inches (20.000 mm)
• Overall height of 2.299 inches (58.400 mm) and outside diameter of 12.205 inches (310.000 mm)
• Floating disc mounting with 5 lug holes, each 0.598 inches (15.200 mm) in diameter
• Smooth surface type for consistent pad contact
• Center hole diameter of 2.559 inches (65.000 mm) and mounting bolt hole circle diameter of 4.409 inches (112.000 mm)
• Weight approximately 15.4 lbs (7.0 kgs)
• ABS tone ring and bearings not included

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 components with precise engineering, including vented rotors that help manage heat buildup during braking. The 121.33121 rotor is part of this line, delivering consistent performance for Audi TT and TT Quattro models without additional features like ABS tone rings or bearings, allowing for straightforward replacement.

Detailed Product Description

This Centric disc brake rotor features a vented design with pillar-style vanes that enhance airflow and heat dissipation, reducing the risk of brake fade during extended use. The rotor’s smooth surface ensures even pad wear and effective braking response. With a nominal thickness of 0.866 inches (22.000 mm) and a discard thickness of 0.787 inches (20.000 mm), it provides a clear service life indicator for maintenance. The floating disc mounting system and 5-lug hole configuration with a 4.409-inch (112.000 mm) bolt circle diameter ensure proper fitment on compatible Audi TT and TT Quattro vehicles. The rotor’s overall height of 2.299 inches (58.400 mm) and outside diameter of 12.205 inches (310.000 mm) match OEM specifications for optimal performance.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Audi TT and TT Quattro
• Addresses brake pulsation and vibration issues caused by uneven rotor surfaces
• Improves heat management to reduce brake fade during aggressive driving
• Restores proper rotor thickness to maintain braking efficiency
• Suitable for vehicles requiring vented rotors with floating disc mounting

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (0.787 inches) before installation
• Clean rotor surface to remove any protective coating or debris prior to mounting
• Verify compatibility with vehicle’s lug pattern: 5 lug holes, 0.598 inches diameter
• Check for proper alignment of center hole (2.559 inches) and bolt circle diameter (4.409 inches)
• ABS tone ring and bearings must be reused or replaced separately as they are not included

Quality Assurance and Warranty

Centric manufactures the C-TEK Standard Disc Brake Rotors to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details for part number 121.33121 should be confirmed with the supplier, Centric typically offers coverage against defects in materials and workmanship. This rotor is engineered to provide consistent braking performance for Audi TT and TT Quattro models when installed according to manufacturer guidelines.