Centric 121.34025 Disc Brake Rotor - Rear

Overview of Centric C-TEK Standard Disc Brake Rotor 121.34025

The Centric C-TEK Standard Disc Brake Rotor 121.34025 is engineered for reliable braking performance on select BMW models. Designed as a solid rotor with a smooth surface, it provides consistent stopping power for vehicles like the BMW 525i, 525iT, 530i, and 535i.

• Compatible with BMW 525i, 525iT, 530i, and 535i models
• Part number 121.34025 for precise identification
• Solid disc brake rotor with smooth surface finish
• Nominal thickness of 0.394 inches (10.000 mm) and discard thickness of 0.331 inches (8.400 mm)
• Overall height of 2.406 inches (61.100 mm) and outside diameter of 11.811 inches (300.000 mm)
• Five stud/lug holes with 0.591 inch (15.000 mm) diameter and 4.724 inch (120.000 mm) bolt circle diameter
• Center hole diameter of 2.953 inches (75.000 mm)
• Weight approximately 11.63 lbs (5.29 kgs)

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers a range of rotors designed to meet OEM specifications for fit, form, and function. This product line focuses on providing solid rotors with smooth surfaces that ensure consistent braking performance and durability. The 121.34025 rotor is part of this line, delivering dependable stopping power for BMW vehicles requiring a direct replacement rotor without ABS tone ring features.

Detailed Product Description

This Centric disc brake rotor is a solid type rotor, meaning it does not have venting channels, which suits applications where heat dissipation demands are moderate. The smooth surface type ensures even pad contact and wear. With a nominal thickness of 0.394 inches (10.000 mm) and a discard thickness of 0.331 inches (8.400 mm), this rotor provides a clear service life indicator for replacement. The overall height of 2.406 inches (61.100 mm) and outside diameter of 11.811 inches (300.000 mm) match OEM dimensions for proper fitment on compatible BMW models. The rotor features five lug holes with a 4.724 inch (120.000 mm) bolt circle diameter and a center hole diameter of 2.953 inches (75.000 mm), ensuring secure mounting. This rotor does not include an ABS tone ring or bearings, so it is intended for vehicles without ABS sensor integration on the rotor itself.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Addressing rotor thickness below discard limits to restore braking efficiency
• Resolving uneven brake pad wear due to rotor surface imperfections
• Eliminating noise or vibration related to damaged or out-of-spec rotors
• Maintaining proper brake system performance on BMW 525i, 525iT, 530i, and 535i models

Installation Notes and Tips

• Verify rotor thickness before installation to ensure it meets minimum discard thickness
• Clean rotor surface and hub mounting area to prevent uneven rotor seating
• Torque lug nuts to manufacturer specifications to avoid rotor warping
• Check compatibility with vehicle ABS system as this rotor does not include an ABS tone ring
• Inspect brake pads and replace if worn to ensure optimal rotor performance

Quality Assurance and Warranty

Centric manufactures the C-TEK Standard Disc Brake Rotors to meet or exceed OEM standards for fit and function. While specific warranty details for part number 121.34025 are not provided here, Centric typically offers coverage against defects in materials and workmanship. Users should consult product documentation or Centric directly for warranty terms applicable to this rotor.