This 10K electric self-adjusting brake assembly is built for the left-hand (driver) side of 9,000–10,000 lb trailer axles. Featuring a 12.25" x 3.375" brake shoe and 7-bolt flange, it delivers powerful and consistent braking ideal for equipment trailers, heavy-duty haulers, and dual tandem setups. Designed for simplified installation and long-term reliability.

Detailed Information:

Fitting:

Installs on the left (driver) side using a standard 7-bolt flange. Designed for 9K–10K axles with electric brake systems. Requires only a compatible brake controller—no hydraulics or actuators necessary. Mounting hardware sold separately.

Features:

• Self-Adjusting System: Maintains consistent brake pressure over time without manual intervention.
• Efficient Magnetic Actuation: Tested magnets provide reliable, even braking response.
• Simple Installation: Easily bolts on—ideal for replacements or upgrades.
• Reduced Vehicle Wear: Automatically optimized braking reduces strain on tow vehicle brakes.
• Built for Heavy Loads: Perfect for commercial flatbeds, tandem axles, and heavy-duty trailers.

Interchangeable Part Numbers:

• MAT 77-1210-1
• MAT 77-1210-01
• AKEBRK-10
• 4738-L
• B1210E-12
• 77-1210RW-1

Product Overview:

This 10K self-adjusting electric brake assembly from MAT is built for durability and high stopping power. Designed for the left side of heavy-duty trailer axles, it delivers smooth, consistent braking and eliminates the hassle of manual adjustment. A dependable upgrade for commercial towing performance.