Trailer Parts Pro 12-1/4″ x 3-3/8″ Electric Brake Assembly, 7-Bolt, 10K, Self-Adjusting, Left & Right, Dust Shield

The Trailer Parts Pro 12-1/4″ x 3-3/8″ Electric Drum Brake Assembly is designed for dependable performance on 10,000 lb. trailer axles (5,000 lbs each). Built for both left (driver) and right (passenger) side applications, this assembly delivers consistent braking power for a wide range of trailers.

Featuring a forward self-adjusting mechanism, it automatically maintains proper brake clearance as the shoes wear, reducing the need for manual adjustments and ensuring reliable operation over time. The 7-bolt mounting pattern provides a secure and precise fit, while the included dust shield helps protect internal components from dirt and debris, extending service life.

Constructed from durable, high-quality materials, this brake assembly is ideal for equipment, utility, and commercial trailers that require strong, consistent stopping power.

Key Features:

• Fits 10,000 lb. trailer axles (5,000 lbs each)
• 12-1/4″ x 3-3/8″ brake size
• Available in left (driver) and right (passenger) sides
• Forward self-adjusting for reduced maintenance
• 7-bolt mounting pattern
• Includes dust shield for added protection