Centric 121.35090 Disc Brake Rotor - Rear

Reliable Disc Brake Rotor for Mercedes-Benz Models

The Centric C-TEK Standard Disc Brake Rotor 121.35090 is engineered to meet the braking demands of select Mercedes-Benz vehicles. Designed for models such as the GL320, GL450, ML320, ML350, ML450, ML500, ML550, R320, R350, and R500, this rotor ensures consistent performance and durability.

• Compatible with Mercedes-Benz GL320, GL450, ML320, ML350, ML450, ML500, ML550, R320, R350, and R500
• Part number 121.35090 for precise identification
• Solid disc rotor with smooth surface for reliable braking
• Nominal thickness of 0.551 inches (14.000 mm) and discard thickness of 0.449 inches (11.400 mm)
• Overall height of 2.476 inches (62.900 mm) and outside diameter of 12.992 inches (330.000 mm)
• Five lug holes with a 4.409 inch (112.000 mm) bolt circle diameter
• Center hole diameter of 2.638 inches (67.000 mm) for proper fitment
• Weight approximately 17.5 lbs (7.95 kgs)

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 standard braking applications. This product line focuses on providing solid rotors with smooth surfaces, ensuring consistent contact with brake pads and reliable stopping power. The 121.35090 rotor is a solid type, not vented, which suits vehicles requiring a durable and straightforward rotor design without ABS tone ring integration.

Product Details and Specifications

This Centric disc brake rotor features a solid construction with a smooth surface type, optimized for standard braking performance. The rotor’s nominal thickness is 0.551 inches (14.000 mm), with a discard thickness of 0.449 inches (11.400 mm), indicating when replacement is necessary to maintain safe braking. The overall height measures 2.476 inches (62.900 mm), and the outside diameter is 12.992 inches (330.000 mm), matching the precise dimensions required for the specified Mercedes-Benz models. The rotor includes five stud/lug holes with a diameter of 0.602 inches (15.300 mm) arranged on a 4.409 inch (112.000 mm) bolt circle diameter, ensuring proper mounting. This rotor does not include an ABS tone ring or bearings, so it is intended for vehicles with compatible braking systems.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Mercedes-Benz GL and ML series
• Addresses brake pulsation and vibration issues caused by uneven rotor surfaces
• Restores braking efficiency and pedal feel for improved safety
• Solves rotor thickness wear beyond discard limits to prevent brake fade
• Suitable for vehicles requiring solid rotors without ABS tone ring integration

Installation Notes and Tips

• Verify compatibility with your specific Mercedes-Benz model and year before installation
• Inspect brake pads and replace if worn to ensure optimal rotor performance
• Clean mounting surfaces and hub to prevent rotor runout
• Torque lug nuts to manufacturer specifications to avoid rotor distortion
• Check rotor thickness with a micrometer to confirm discard limits before installation

Quality Assurance and Warranty

Centric C-TEK Standard Disc Brake Rotors are manufactured to meet OEM standards for fit, form, and function. While specific warranty details for part number 121.35090 are not provided here, Centric typically offers coverage against defects in materials and workmanship. It is recommended to consult product documentation or the manufacturer for exact warranty terms.