Centric 121.66058 Disc Brake Rotor - Rear

Reliable Disc Brake Rotor for Buick, Chevrolet, Pontiac, and Saturn

The Centric C-TEK Standard Disc Brake Rotor 121.66058 is engineered to meet the braking needs of select Buick, Chevrolet, Pontiac, and Saturn models. Designed as a solid rotor with a smooth surface, it provides consistent stopping power and durability for vehicles like the Montana, Relay, Terraza, and Uplander.

• Part Number: 121.66058
• Compatible with Buick Montana, Chevrolet Uplander, Pontiac Montana, Saturn Relay, and Terraza
• Solid disc brake rotor with smooth surface finish
• Outside diameter: 11.811 inches (300 mm)
• Nominal thickness: 0.472 inches (12.000 mm)
• Discard thickness: 0.413 inches (10.500 mm)
• Overall height: 1.189 inches (30.200 mm)
• Floating disc mounting with 5 lug holes (0.571 inches diameter)
• Weight approximately 13.1 lbs (5.95 kgs)
• ABS tone ring not included

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers reliable replacement rotors designed to meet or exceed OEM specifications. This product line focuses on providing solid rotors with smooth surfaces that ensure consistent braking performance and ease of installation. The 121.66058 rotor is part of this line, delivering dependable stopping power for compatible vehicles without additional features like venting or ABS tone rings.

Technical Details and Specifications

This disc brake rotor features a solid design with a smooth surface type, which helps maintain consistent brake pad contact and reduces noise. The rotor measures 11.811 inches (300 mm) in outside diameter and has a nominal thickness of 0.472 inches (12.000 mm), with a discard thickness of 0.413 inches (10.500 mm) indicating when replacement is necessary. The overall height is 1.189 inches (30.200 mm), and it mounts using a floating disc mounting system with a 5-lug hole pattern, each hole measuring 0.571 inches (14.5 mm) in diameter. The mounting bolt hole circle diameter is 4.5 inches (114.3 mm), and the center hole diameter is 2.78 inches (70.6 mm). This rotor does not include bearings or an ABS tone ring.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Buick Montana and Pontiac Montana
• Restores braking performance on Chevrolet Uplander and Saturn Relay
• Addresses brake pulsation and noise caused by uneven rotor surfaces
• Prevents brake fade due to rotor thickness below discard limits
• Suitable for vehicles requiring solid rotors without venting or ABS tone rings

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness before installation
• Clean rotor surface and hub mounting area to prevent uneven wear
• Use proper torque specifications for lug nuts to avoid rotor warping
• Check compatibility with vehicle ABS systems as this rotor does not include a tone ring
• Inspect brake pads and replace if worn to ensure optimal braking performance

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 are not provided here, Centric typically offers coverage against defects in materials and workmanship. Using part number 121.66058 ensures compatibility and quality for your Buick Montana, Chevrolet Uplander, Pontiac Montana, or Saturn Relay brake system replacement needs.