Centric 121.34155 Disc Brake Rotor - Rear

Overview of Centric C-TEK Standard Disc Brake Rotor 121.34155

The Centric C-TEK Standard Disc Brake Rotor 121.34155 is engineered for reliable braking performance on BMW and Mini vehicles, specifically designed for models like the Cooper, i3, and i3s. This solid rotor offers consistent stopping power with precise fitment and durable construction.

• Compatible with BMW and Mini Cooper, i3, and i3s models
• Part number 121.34155 for exact replacement
• Solid disc brake rotor with smooth surface finish
• Outside diameter of 280 mm (11.024 inches)
• Nominal thickness of 8.6 mm (0.339 inches) and discard thickness of 8.2 mm (0.323 inches)
• Overall height of 50.2 mm (1.976 inches)
• Floating disc mounting with 5 lug holes (16.8 mm diameter)
• Center hole diameter of 67 mm (2.638 inches) and mounting bolt hole circle diameter of 112 mm (4.409 inches)
• Weight approximately 3.88 kg (8.55 lbs)

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric is designed to provide dependable, OEM-quality replacement rotors for a variety of vehicle applications. These rotors feature a smooth surface type and solid construction, ensuring consistent braking performance and durability. The line focuses on precise fitment and reliable stopping power, making it suitable for daily driving conditions and standard braking requirements.

Detailed Product Description

This Centric disc brake rotor 121.34155 is a solid rotor with a smooth surface, engineered to meet the exact specifications required by BMW and Mini Cooper, i3, and i3s models. The rotor measures 280 mm in outside diameter and has a nominal thickness of 8.6 mm, with a discard thickness of 8.2 mm, ensuring it maintains structural integrity throughout its service life. The overall height of 50.2 mm and a center hole diameter of 67 mm provide proper alignment and fitment. The rotor mounts using a floating disc mounting system with five lug holes, each 16.8 mm in diameter, and a mounting bolt hole circle diameter of 112 mm. Weighing approximately 3.88 kg, this rotor balances durability with manageable weight for efficient braking response.

Common Applications and Issues Addressed

• Replacement for worn or warped rotors causing brake pulsation
• Restores braking performance on BMW Cooper, i3, and i3s models
• Eliminates noise and vibration from uneven rotor surfaces
• Addresses rotor thickness below manufacturer discard limits
• Improves overall brake system reliability and safety

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (8.2 mm) before installation
• Clean rotor surface and hub mounting area to prevent uneven wear
• Use proper torque specifications for mounting bolts to avoid rotor distortion
• Check compatibility with vehicle ABS system; 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 C-TEK Standard Disc Brake Rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. While specific warranty details for part number 121.34155 are not provided here, Centric typically offers coverage against defects in materials and workmanship. Proper installation and maintenance are essential to ensure product longevity and performance.