Centric 122.66028 Brake Drum - Rear

Overview of Centric Premium Brake Drum 122.66028

The Centric Premium Brake Drum 122.66028 is engineered for reliable braking performance on select Chevrolet, GMC, Isuzu, Oldsmobile, and Pontiac vehicles. Designed to meet OEM specifications, this brake drum supports consistent stopping power and durability for models like the Chevrolet Blazer, GMC Jimmy, and Pontiac Firebird.

• Nominal drum diameter: 241.30 mm (9.5 inches)
• Maximum brake diameter (discard): approximately 243.6 mm (9.59 inches)
• Outside diameter: 304.0 mm (11.97 inches)
• Friction surface width: 62.2 mm (2.45 inches)
• Mounting type: Floating with 5 bolt holes
• Includes outer cooling fins for heat dissipation
• Weight: 14 lbs (6.364 kgs)
• Bolt circle diameter: 120.65 mm (4.75 inches)

About Centric Premium Brake Drums

The Centric Premium Brake Drums line focuses on delivering precision-engineered brake components that align closely with original equipment standards. This product line emphasizes durability and consistent performance, featuring design elements such as outer cooling fins to help manage heat buildup during braking. The 122.66028 brake drum is part of this line, providing a reliable replacement option for various GM and Isuzu models requiring a floating mounting type brake drum.

Product Details and Specifications

This brake drum features a nominal diameter of 241.30 mm and a maximum discard diameter of approximately 243.6 mm, ensuring it meets wear limits for safe operation. The friction surface width of 62.2 mm provides adequate contact area for brake shoes, contributing to effective braking. The drum’s outside diameter measures 304.0 mm, and it includes five bolt holes with a bolt circle diameter of 120.65 mm, compatible with the specified vehicle models. The floating mounting type and outer cooling fins enhance heat dissipation and help maintain braking efficiency under various driving conditions.

Compatible Vehicles and Applications

• Chevrolet Blazer, Camaro, S10, S10 Blazer, Sonoma
• GMC Jimmy, Sonoma
• Isuzu Hombre, Bravada
• Oldsmobile and Pontiac Firebird

This brake drum is designed specifically for these models, ensuring proper fit and function when replacing worn or damaged drums.

Common Issues Addressed by This Brake Drum

• Brake drum wear beyond maximum diameter limits
• Overheating and reduced braking efficiency due to poor heat dissipation
• Vibration or noise caused by warped or damaged drums
• Corrosion or surface damage affecting brake shoe contact
• Incompatibility with original mounting specifications

Installation Notes and Tips

Ensure the brake drum is installed on compatible vehicles listed above. Verify the mounting hole pattern and bolt circle diameter match the vehicle hub. Clean the hub surface before installation to prevent misalignment. Check the brake shoes for wear and replace if necessary to maintain optimal braking performance. Properly torque mounting bolts to manufacturer specifications to avoid drum distortion.

Quality Assurance and Warranty

Centric Premium Brake Drums are manufactured to meet or exceed OEM standards, providing consistent quality and durability. The 122.66028 brake drum undergoes rigorous quality control to ensure dimensional accuracy and material integrity. Warranty coverage details should be confirmed with the product supplier or manufacturer.