Centric 121.44138 Disc Brake Rotor - Front Left

Overview of Centric C-TEK Standard Disc Brake Rotor 121.44138

The Centric C-TEK Standard Disc Brake Rotor 121.44138 is engineered for reliable braking performance on select Lexus models. Designed as a vented rotor with a smooth surface, it provides consistent stopping power and heat dissipation for vehicles like the Lexus GS350 and IS350.

• Compatible with Lexus GS350, GS430, GS450h, GS460, IS200t, IS300, and IS350
• Part number 121.44138 for precise identification
• Vented disc brake rotor with curved vane style for improved cooling
• Nominal thickness of 1.173 inches (29.8 mm) and discard thickness of 1.063 inches (27.0 mm)
• Outside diameter of 13.15 inches (334 mm) and overall height of 2.0 inches (50.8 mm)
• Floating disc mounting with 5 lug holes, 0.571 inch (14.5 mm) diameter each
• Hat inner diameter of 5.646 inches (143.4 mm) and mounting bolt circle diameter of 4.5 inches (114.3 mm)
• Weight approximately 25.6 lbs (11.6 kgs)
• ABS tone ring not included, 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 specifications for fit, form, and function. This product line focuses on providing reliable, direct replacement rotors with features such as vented designs and smooth surfaces to ensure consistent braking performance and heat management. The 121.44138 rotor is part of this line, delivering dependable stopping power for various Lexus models.

Detailed Product Description

This Centric disc brake rotor features a vented design with curved vanes that enhance airflow and cooling during braking, reducing the risk of brake fade. The smooth surface finish ensures even pad contact and wear. With a nominal thickness of 1.173 inches and a discard thickness of 1.063 inches, this rotor maintains structural integrity and safety throughout its service life. The floating disc mounting system allows for slight movement to accommodate thermal expansion and improve rotor longevity. The rotor’s dimensions, including a 13.15-inch outside diameter and 2.0-inch overall height, are engineered to match the specifications required by Lexus GS and IS series vehicles.

Common Applications and Issues Addressed

• Replacement for worn or warped rotors causing brake pulsation
• Upgrading from damaged or scored rotors to restore smooth braking
• Addressing brake noise due to uneven rotor surfaces
• Improving heat dissipation to reduce brake fade during heavy use
• Ensuring proper rotor thickness for safe braking performance

Installation Notes and Tips

• Verify compatibility with Lexus GS350, GS430, GS450h, GS460, IS200t, IS300, and IS350 before installation
• Check rotor thickness and discard limits to ensure safe replacement
• Clean mounting surfaces and hub to prevent rotor runout
• Torque lug nuts to manufacturer specifications for proper fitment
• ABS tone ring and bearings are not included; reuse existing components if applicable

Quality Assurance and Warranty

Centric C-TEK Standard Disc Brake Rotors are manufactured to meet OEM standards for quality and durability. While specific warranty details are not provided here, Centric typically offers coverage against defects in materials and workmanship. Using part number 121.44138 ensures you receive a rotor designed specifically for your Lexus GS and IS models, supporting consistent braking performance and safety.