Centric 121.39034 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.39034

The Centric C-TEK Standard Disc Brake Rotor 121.39034 is engineered for reliable braking performance on Volvo XC90 models. Designed as a vented rotor with a smooth surface, it offers consistent heat dissipation and durability for everyday driving conditions.

• Compatible with Volvo XC90 vehicles
• Part number 121.39034 for precise identification
• Vented disc brake rotor design for improved cooling
• Nominal thickness of 1.181 inches (30.000 mm)
• Discard thickness at 1.063 inches (27.000 mm)
• Outside diameter of 13.209 inches (335.500 mm)
• Overall height of 2.016 inches (51.200 mm)
• Floating disc mounting with pillar vane style for enhanced airflow
• 5 stud/lug holes with 0.661 inch (16.800 mm) diameter
• Weight approximately 25 lbs (11.360 kgs)

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric focuses on delivering dependable replacement rotors that meet or exceed OEM specifications. This product line emphasizes consistent thickness and balanced design, ensuring proper fitment and braking performance for vehicles like the Volvo XC90. The 121.39034 rotor maintains the standard vented construction and smooth surface finish typical of this line, supporting effective heat dissipation and rotor longevity.

Technical Details and Specifications

This disc brake rotor features a nominal thickness of 1.181 inches (30.000 mm) and a discard thickness of 1.063 inches (27.000 mm), indicating the minimum thickness before replacement is necessary. The rotor’s outside diameter measures 13.209 inches (335.500 mm), with an overall height of 2.016 inches (51.200 mm). It includes a floating disc mounting system and pillar-style vanes to optimize airflow and cooling during braking. The rotor has five stud/lug holes, each with a diameter of 0.661 inches (16.800 mm), and a mounting bolt hole circle diameter of 4.252 inches (108.000 mm). This rotor does not include an ABS tone ring or bearings.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Volvo XC90 models
• Addresses brake pulsation caused by uneven rotor thickness
• Resolves excessive brake noise due to rotor surface wear
• Improves braking performance by restoring proper rotor thickness
• Prevents overheating with vented design to reduce brake fade

Installation Notes and Tips

• Ensure rotor thickness is measured before installation to confirm discard limits
• Clean mounting surfaces to prevent rotor runout and vibration
• Use proper torque specifications on lug nuts to avoid rotor distortion
• Check compatibility with Volvo XC90 model year and brake system
• Inspect brake pads and replace if worn to maintain optimal braking

Quality Assurance and Warranty

Centric’s C-TEK Standard Disc Brake Rotors are manufactured to meet OEM standards for fit, form, and function. While specific warranty details for part number 121.39034 are not provided here, Centric typically offers coverage against defects in materials and workmanship. Users should consult product documentation or authorized sources for exact warranty terms.