Centric 121.65090 Disc Brake Rotor - Rear

Reliable Disc Brake Rotor for Ford Explorer and Mercury Mountaineer

The Centric C-TEK Standard Disc Brake Rotor 121.65090 is engineered to provide consistent braking performance for Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer models. Designed as a solid rotor with a smooth surface, it meets OEM specifications to ensure proper fit and function.

• Compatible with Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer
• Part number 121.65090 for precise identification
• Solid disc brake rotor with smooth surface finish
• Nominal thickness of 0.476 inches (12.1 mm) and discard thickness of 0.433 inches (11.0 mm)
• Outside diameter of 11.85 inches (301 mm) and overall height of 2.291 inches (58.2 mm)
• Five lug holes with 0.539 inch (13.7 mm) diameter and 4.5 inch (114.3 mm) bolt circle diameter
• Center hole diameter of 3.228 inches (82 mm)
• Weight approximately 14 lbs (6.36 kg)

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 standards for fit, form, and function. This product line focuses on providing reliable, direct replacement rotors that maintain factory specifications, ensuring consistent braking performance and durability. The 121.65090 rotor is part of this line, delivering solid rotor construction and smooth surface finish suitable for daily driving conditions on compatible Ford and Mercury vehicles.

Product Details and Specifications

This Centric disc brake rotor features a solid design with a smooth surface type, optimized for vehicles without ABS tone rings. The rotor's nominal thickness is 0.476 inches (12.1 mm), with a discard thickness of 0.433 inches (11.0 mm), indicating when replacement is necessary to maintain safe braking. The outside diameter measures 11.85 inches (301 mm), and the overall height is 2.291 inches (58.2 mm). It includes five lug holes sized at 0.539 inches (13.7 mm) on a 4.5 inch (114.3 mm) bolt circle diameter, and a center hole diameter of 3.228 inches (82 mm). This rotor weighs approximately 14 pounds (6.36 kg), balancing durability and ease of installation.

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
• Upgrading to OEM-spec rotors for consistent braking performance on Ford Explorer and Mercury Mountaineer
• Eliminating noise or vibration issues related to damaged rotors

Installation Notes and Tips

• Ensure rotor thickness is measured before installation to confirm discard limits
• Clean rotor surface and hub mounting area to prevent runout and vibration
• Use proper torque specifications on lug nuts to avoid rotor warping
• Check compatibility with vehicle ABS system; this rotor does not include an ABS tone ring
• Inspect brake pads and replace if necessary to ensure optimal rotor performance

Quality Assurance and Warranty

Centric C-TEK Standard Disc Brake Rotors are manufactured to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details for part number 121.65090 should be confirmed with the manufacturer or distributor, Centric generally provides coverage against defects in materials and workmanship. This rotor is engineered to meet OEM specifications for Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer models, supporting safe and effective braking.