10K Heavy Duty 12.25"x4" Trailer Axle Electric Brake Assembly - 10000 lb Capacity - Left Hand (Driver Side)

  • Ensure the smooth and reliable operation of your trailer with our 3500 lb Trailer Axle U-Bolt Kit. This comprehensive kit is designed to provide all the necessary co3500 lb Trailer Axle
  • 10K Heavy Duty Electric Brake Assembly – 12.25x4 Left Hand (Driver's Side)
  • 10K Heavy Duty Electric Trailer Brake Assembly (Pair) – 12.25x4 Right Hand & Left Hand
  • 10K Heavy Duty Complete Electric Trailer Brake Assembly – 12.25x4 (Right & Left Hand)
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10K Heavy Duty 12.25"x4" Trailer Axle Electric Brake Assembly - 10000 lb Capacity - Left Hand (Driver Side)

10K Heavy Duty 12.25"x4" Trailer Axle Electric Brake Assembly - 10000 lb Capacity - Left Hand (Driver Side)

SKU : 10HDBRKAS-PAIR-BULK

Online price only

$3,694.99

Online price only

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4.5
Rated 4.5 out of 5 stars
149 Reviews
Shipping: Calculated at Checkout
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10K Electric Trailer Brake Assembly — Left Hand (Driver Side) | 12.25" × 4" | 7-Bolt Flange

Upgrade your trailer’s braking system with this heavy-duty 10K electric brake assembly designed for Dexter heavy-duty trailer axles. Built for demanding towing conditions, this driver-side brake delivers strong stopping power and dependable performance for equipment, cargo, and commercial trailers.

Note: Fits Dexter heavy-duty axles only. Not compatible with Rockwell, Texas Pride, or TK trailer axles.

Brake Assembly Specifications

  • Position: Left hand (driver side)
  • Brake size: 12.25" × 4"
  • Axle capacity: 10,000 lbs per axle
  • Mounting flange: 7-bolt pattern
  • Weight: 19 lbs
  • Shipping dimensions: 14" × 14" × 6" box
  • Compatibility: Dexter heavy-duty axles only

What’s Included

  • (1) 10K electric brake assembly — driver side

Key Benefits

  • Heavy-duty brake assembly designed for 10K trailer axles
  • Strong, reliable stopping power for heavy loads
  • Rear adjustment ports allow quick brake tuning
  • Simple installation with standard wiring connection
  • Durable construction built for demanding trailer use

Installation Notes

  • Installation requires seven mounting bolts and two wire connections. Mounting hardware is sold separately.
  • For best braking performance, new brake assemblies should be burnished before regular use.

Brake Burnishing Procedure

  • Perform 20–30 moderate stops from 40 mph down to 20 mph.
  • Allow the brakes to cool between each application.
  • This process helps properly seat the brake shoes and ensures optimal braking performance.

Ideal For

  • Equipment trailers
  • Heavy-duty utility trailers
  • Cargo and flatbed trailers
  • Commercial hauling trailers

Why Buy from The Trailer Parts Outlet?

  • Fast shipping
  • Bulk and wholesale options available
  • High-quality trailer brake components
  • Expert support for selecting the right parts

Order your 10K electric trailer brake assembly today and restore dependable braking performance to your trailer.

4.5
Rated 4.5 out of 5 stars
Based on 149 reviews
Total 5 star reviews: 118 Total 4 star reviews: 15 Total 3 star reviews: 5 Total 2 star reviews: 1 Total 1 star reviews: 10
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149 reviews
  • MB
    Mark B.
    Verified Buyer
    Yesterday
    Rated 5 out of 5 stars
    Trailer brake assembly

    Brakes were what was expected. Fairly quick shipping. Although the packaging is a bit weak. Could use a bit more material to secure brake assembly in the box. Otherwise very good experience.

    Was this helpful?
    The Trailer Parts Outlet
    4 minutes ago

    Thank you for your business and your feedback, we will definitely take that into consideration on our packaging!

  • DP
    Dale P.
    Verified Buyer
    1 week ago
    Rated 5 out of 5 stars
    brake assembly

    I was impressed with the product and the ease of replacing the 20 year old brakes on my trailer, the low cost and product quality

    Was this helpful?
    The Trailer Parts Outlet
    1 week ago

    Great to hear you were impressed with the 3.5k Trailer Axle Electric Brake Assembly and that it made replacing your 20 year old brakes so easy, Dale! We're thrilled the product quality and low cost exceeded your expectations. It sounds like it was the perfect solution for updating your trailer. We really appreciate your business and thank you for your 5 star review!

    Loretta Peacock
    (936) 935-2186
    The Trailer Parts Outlet

  • CD
    Christopher D. B.
    Verified Buyer
    2 weeks ago
    Rated 4 out of 5 stars
    Electric brakes

    Installation was made easy having the assembly pre assembled

    Was this helpful?
  • JM
    Jess M. B.
    Verified Buyer
    2 weeks ago
    Rated 5 out of 5 stars
    Hubs

    Great service, 1 part was lost in transit and was replaced without question 😊

    Was this helpful?
  • GK
    Gary K.
    Verified Buyer
    3 weeks ago
    Rated 5 out of 5 stars
    Look good

    I bought 2 sets to install on RV, as last year when packing bearings brakes looked worn. So removed tire and drum today and noticed that brakes are still good as having something to compare shoes with . I did notice a difference in new assembly compared with OEM. OEM does not have auto brake adjust when you back up and hit the brakes . The new brake assembly does.

    Was this helpful?
    The Trailer Parts Outlet
    1 week ago

    Hi Gary,

    Thank you for the 5-star review and for taking the time to share your feedback on the 3.5k Trailer Axle Electric Brake Assembly. We're glad to hear that they look good and that you're pleased with the quality. It sounds like you made a smart decision getting them ahead of time while doing your bearing maintenance - it's always good to have a comparison to work with. We appreciate you mentioning the difference with the auto brake adjust feature compared to your OEM setup. That's helpful information for other customers who might be wondering about the functionality differences when upgrading their brake assemblies.

    Loretta Peacock
    936-220-4018 The Trailer Parts Outlet

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