Centric 121.38021 Disc Brake Rotor - Rear

Overview of Centric C-TEK Standard Disc Brake Rotor 121.38021

The Centric C-TEK Standard Disc Brake Rotor 121.38021 is engineered for reliable braking performance on Saab 9-3 and 9-3X models. Designed as a vented rotor with a smooth surface, it provides consistent stopping power and heat dissipation for everyday driving conditions.

• Compatible with Saab 9-3 and 9-3X vehicles
• Vented disc brake rotor for improved heat management
• Overall diameter of 291.9 mm (11.492 inches)
• Nominal thickness of 19.9 mm (0.783 inches) with discard thickness at 18.0 mm (0.709 inches)
• Floating disc mounting with 5 lug holes (14.2 mm diameter)
• Straight vane style for efficient airflow
• Center hole diameter of 70 mm (2.756 inches)
• Weight approximately 11.75 lbs (5.34 kgs)

Product Line Details: C-TEK Standard Disc Brake Rotors

The C-TEK Standard Disc Brake Rotors line by Centric offers a balance of quality and value for standard braking applications. This product line focuses on delivering rotors with precise fitment and consistent performance, making them suitable replacements for original equipment on vehicles like the Saab 9-3 and 9-3X. The rotors feature vented designs and smooth surfaces to maintain effective braking and heat dissipation under normal driving conditions.

Technical Specifications and Features

This Centric disc brake rotor features a vented design with straight vanes that promote airflow to reduce heat buildup during braking. The rotor’s overall height measures 43.7 mm (1.72 inches), and it includes a floating disc mounting system with three miscellaneous holes for secure installation. The mounting bolt hole circle diameter is 110 mm (4.331 inches), accommodating five lug holes with a diameter of 14.2 mm (0.559 inches). The nominal thickness of 19.9 mm ensures durability, while the discard thickness of 18.0 mm indicates when replacement is necessary to maintain safe braking performance.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Saab 9-3 and 9-3X
• Addresses brake pulsation caused by uneven rotor surfaces
• Improves heat dissipation to reduce brake fade during extended use
• Restores proper rotor thickness for consistent braking response
• Eliminates noise and vibration related to damaged rotors

Installation Notes and Tips

Ensure the rotor mounting surface is clean and free of rust or debris before installation. Verify the rotor thickness is above the discard thickness specification of 18.0 mm to maintain safety standards. Use proper torque specifications for the five lug bolts to secure the rotor. Since this rotor does not include bearings or an ABS tone ring, confirm compatibility with your vehicle’s existing components. It is recommended to replace brake pads simultaneously for optimal braking performance.

Quality Assurance and Warranty

Centric C-TEK Standard Disc Brake Rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. While specific warranty details for part number 121.38021 are not provided here, Centric typically offers limited warranties covering defects in materials and workmanship. Always consult product documentation or the manufacturer for exact warranty terms.