Description
AxleTek 12-1/4″ x 3-3/8″ Right Hand Self-Adjusting Electric Trailer Brake Assembly Box Kit – 10,000 lb
Built for demanding towing applications, the AxleTek 12-1/4″ x 3-3/8″ Right Hand Self-Adjusting Electric Trailer Brake Assembly Box Kit delivers reliable stopping power for trailers equipped with 10,000 lb axles. This complete box kit ensures consistent braking performance while minimizing maintenance through its self-adjusting design.
Manufactured to FSA (Self-Adjusting) specifications, this passenger-side brake assembly automatically maintains proper brake shoe clearance during normal operation. Included mounting hardware simplifies installation, making this kit ideal for heavy-duty equipment, flatbed, and commercial trailers.
Key Features:
- Self-Adjusting (FSA) Design: Automatically maintains proper brake shoe adjustment for consistent braking.
- Complete Box Kit: Includes right-hand brake assembly and (7) 7/16″ mounting bolts with nuts.
- Heavy-Duty Capacity: Engineered for trailers using 10,000 lb axles.
- Wide Brake Surface: 12-1/4″ x 3-3/8″ brake shoes provide increased stopping power.
- Durable Brake Shoes: Automotive-grade friction material bonded to the shoe for extended service life.
- E-Coated Backing Plate: Helps resist corrosion in harsh road and weather conditions.
- Electric Brake Compatible: Designed for use with standard electric brake controllers (sold separately).
Specifications:
- Configuration: Right hand (passenger side)
- Brake Size: 12-1/4″ diameter x 3-3/8″ wide
- Axle Rating: 10,000 lbs
- Adjustment Type: Self-adjusting (FSA)
- Mounting Hardware: (7) 7/16″ bolts and nuts included
- Brand: Genuine AxleTek
Included in the Box:
- Right Hand Self-Adjusting Electric Brake Assembly
- (7) 7/16″ Mounting Bolts
- (7) 7/16″ Nuts
Compatibility:
This AxleTek 12-1/4″ x 3-3/8″ self-adjusting electric brake assembly box kit fits most standard hub-and-drum brake systems used on heavy-duty equipment trailers, flatbed trailers, dump trailers, and commercial haulers requiring dependable braking on 10,000 lb axles.
Benefits:
- Reduced Maintenance: Self-adjusting mechanism minimizes routine brake adjustments.
- Consistent Stopping Power: Maintains proper shoe-to-drum contact under heavy loads.
- Faster Installation: Box kit includes all required mounting hardware.
- Heavy-Duty Reliability: Built for commercial and equipment hauling applications.
Safety Assurance:
AxleTek electric brake assemblies are manufactured to meet strict quality and performance standards. Each unit is tested to ensure dependable braking performance in real-world towing conditions.
Conclusion:
Choose the AxleTek 12-1/4″ x 3-3/8″ Right Hand Self-Adjusting Electric Trailer Brake Assembly Box Kit for a complete, heavy-duty braking solution. With self-adjusting technology, wide brake surface area, and included hardware, this box kit delivers confidence and control for 10,000 lb trailer axles.
- Q: What does FSA mean?
- A: FSA stands for self-adjusting, meaning the brake automatically maintains proper brake shoe adjustment during normal use.
- Q: Is this the passenger-side brake?
- A: Yes, this is the right-hand (passenger-side) brake assembly.
- Q: Does this kit include mounting hardware?
- A: Yes, this box kit includes (7) 7/16″ mounting bolts and nuts.
- Q: Will this fit a 10,000 lb axle?
- A: Yes, this brake assembly is designed specifically for 10,000 lb axles using a 12-1/4″ x 3-3/8″ brake configuration.

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