Centric 121.62138 Disc Brake Rotor - Front

Reliable Disc Brake Rotor for Cadillac ATS and CT4

The Centric C-TEK Standard Disc Brake Rotor 121.62138 is engineered to meet the braking demands of Cadillac ATS and CT4 models. Designed with precision, this vented rotor ensures consistent performance and durability under various driving conditions.

• Compatible with Cadillac ATS and CT4 vehicles
• Vented disc design for improved heat dissipation
• Nominal thickness of 1.181 inches (30.000 mm) with discard thickness at 1.063 inches (27.000 mm)
• Overall height of 2.409 inches (61.200 mm) and outside diameter of 12.638 inches (321.000 mm)
• Floating disc mounting and straight vane style for efficient cooling
• 5 stud/lug holes with a diameter of 0.559 inches (14.200 mm)
• Center hole diameter of 2.783 inches (70.700 mm) and mounting bolt hole circle diameter of 4.528 inches (115.000 mm)
• Solid smooth surface type without ABS tone ring included

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers a balance of quality and value for everyday driving needs. These rotors are designed to meet or exceed OEM specifications, providing reliable braking performance with a focus on durability and consistent wear. The 121.62138 rotor exemplifies this line’s commitment to precision engineering, featuring vented construction and a floating disc mounting system to optimize heat management and rotor longevity.

Technical Details and Performance Features

This disc brake rotor features a vented design with straight vanes that enhance airflow and heat dissipation, reducing the risk of brake fade during extended use. The rotor’s nominal thickness of 1.181 inches (30.000 mm) ensures a robust braking surface, while the discard thickness of 1.063 inches (27.000 mm) indicates the minimum safe thickness for replacement. The floating disc mounting allows for slight movement to accommodate thermal expansion, improving braking consistency. With a smooth surface type, this rotor is compatible with standard brake pads and does not include an ABS tone ring or bearings.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Cadillac ATS and CT4
• Addresses brake pulsation and vibration issues
• Improves heat dissipation to reduce brake fade
• Restores braking performance after rotor surface damage
• Suitable for vehicles requiring vented rotors with floating mounting

Installation Notes and Tips

Ensure the rotor thickness is measured before installation to confirm it exceeds the discard thickness of 1.063 inches (27.000 mm). Clean the rotor surface and hub mounting area to prevent uneven contact. Use proper torque specifications for the 5 lug nuts with 0.559 inch (14.200 mm) diameter holes. Since this rotor does not include bearings or an ABS tone ring, verify compatibility with your vehicle’s existing components. The floating disc mounting requires careful alignment during installation to maintain proper rotor movement.

Quality Assurance and Warranty

Centric’s C-TEK Standard Disc Brake Rotors are manufactured to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details for part number 121.62138 should be confirmed with the supplier, Centric typically offers coverage against defects in materials and workmanship. This rotor is designed to provide consistent braking performance for Cadillac ATS and CT4 models when installed and maintained properly.