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  1. Trailer Brakes
  2. Dexter
  3. Electric Drum Brakes
  4. 7200 lbs Axle
  5. 12-1/4 x 2-1/2 Inch Drum
  6. 16 Inch Wheel
  7. 16-1/2 Inch Wheel
  8. 17 Inch Wheel
  9. 17-1/2 Inch Wheel
Dexter Electric Trailer Brakes - Parking Brake Ready - 12-1/4" - Left/Right Hand - 7.2K
Up to $50 Online Rebate When You Purchase Up to 6 Qualifying Dexter Brakes.
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Dexter

Dexter Electric Trailer Brakes - Parking Brake Ready - 12-1/4" - Left/Right Hand - 7.2K

Part Number: 23-428-429
In Stock
$577.23
$557.23 after $20.00 Mail-In Rebate
Trailer Brakes
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Dexter Electric Drum Brakes - 23-428-429
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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
If your trailer sees off-road action, use a handbrake (not included) with these brakes to hold it steady when parking on uneven terrain. Set of 12-1/4" x 2-1/2" Assemblies fits 16" wheels or larger. Made in the USA. Great Prices for the best trailer brakes from Dexter. Dexter Electric Trailer Brakes - Parking Brake Ready - 12-1/4" - Left/Right Hand - 7.2K part number 23-428-429 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Dexter Trailer Brakes - 23-428-429

Highlights

  • Safer Parking Control: Parking-brake-ready design lets you hold your trailer steady on uneven ground.
  • Quick DIY Install: Left and right assemblies mount to 4-bolt flanges for 12-1/4" x 2-1/2" drums.
  • Consistent Braking Feel: Bonded, tapered pads give strong, smooth braking and help prevent lockup.
  • Clean, Long-Lasting Operation: Adjuster plugs keep dirt and debris out of internal components.
  • Easy Manual Adjustment: Star wheel makes routine brake tuning fast with just a screwdriver.
  • Built for Heavy Loads: Fits 7,200 lb axles and 16" or larger wheels for confident stopping power.
Made in USA

Features to know about

Hold Steady on Uneven Ground: Parking-Brake-Ready Design

When you’re parked on rough or sloped terrain, these brake assemblies let you secure your trailer with a handbrake setup. The Dexter 23-428-429 kit is parking-brake-ready, so you can connect a tongue-mounted activating lever and cables (sold separately) to hold everything steady. It’s a simple way to add control and stability when loading, unloading, or camping off the beaten path.

Reliable Braking for Heavy Loads: 12-1/4" x 2-1/2" Electric Drum Assemblies

Built for 7,200-lb axles and wheels 16" or larger, these electric drum brakes deliver solid braking torque and consistent stopping power. They connect through a standard 4-bolt mounting flange and work with most hub-and-drum assemblies, including Dexter and Lippert. All you need is an electric brake controller—no hydraulic actuator or lines required—so the system stays simple and dependable.

Smooth, Consistent Stops: Bonded, Tapered Brake Pads

These assemblies use fully bonded pads instead of riveted ones, giving you more friction contact for stronger, smoother braking. The pads have tapered edges that help reduce chatter and lockup, keeping braking consistent even as the shoes wear. It’s a design that feels steady right from the start and stays that way over time.

Close-up view of Dexter electric trailer drum brake assembly showing tapered bonded brake pads.

Easy Maintenance When You Need It: Manual-Adjust Setup with Protective Plugs

This set uses a manual adjustment system that’s quick to tune with a brake tool or screwdriver. Adjuster plugs are already in place to keep dirt and road grime out of the mechanism, helping everything last longer. With just a few minutes of routine maintenance, you can keep brakes properly dialed in for shorter stops and better control.

Close-up instructional image showing how to adjust a trailer drum brake using an adjuster screw and tool.

Specs

Application

  • Application: most standard hub-and-drum assemblies, including etrailer, Dexter, and Lippert (LCI)

Dimensions

  • Dimensions: 12-1/4" diameter x 2-1/2" wide

Mounting

  • Mounting flange bolt pattern: 4 bolt

Diagram showing manual parking brake cable installation on the rear of an electric trailer drum brake assembly for Dexter 12-1/4 inch brakes.

Wheel Compatibility

  • Wheel size: 16" or larger

Weight and Capacity

  • Axle rating: 7,200 lbs

Warranty

  • Limited warranty: 5-year warranty

23-428 Dexter Electric Brake Assembly - LH - Driver Side - 12-1/4" x 2-1/2" - 4 Bolt - Manual Adjust - 7,200 lbs

23-429 Dexter Electric Brake Assembly - RH - Passenger Side - 12-1/4" x 2-1/2" - 4 Bolt - Manual Adjust - 7,200 lbs





Customer Satisfaction Score:

Ratings & Reviews

4.8

1753 reviews
5 Stars
(1532)
4 Stars
(136)
3 Stars
(31)
2 Stars
(20)
1 Star
(34)
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by:
First order was incorrect but they went above to get my order here as fast as they could. Great service will be order again from them!!
by:
My salesman very knowledgeable help me with some questions.
Easy to understand and pleasant.
I bought two axles worth of electric brakes. They are exactly the right fit easy to install. I will definitely use them again for further needs.
by:
Excellent products at excellent pricing & excellent shipping!!!
by:
Excellent customer service I had issues with the box the hub was in and they shipped out missing part right away
by:
It makes the trailer stop
by:
Great priced products delivered fast
by:
Ordering was easy. Brakes arrived promptly.very well packaged.
by:
Everything went easy ,and brake backing plates where exactly what I ordered an delivered on time
by:
Had what we needed Shipped day order was placed. Received day was told to expect. What more could you ask.
by:
Parts look good, have not installed them yet
by:
GREAT JOB JUSTIN!
FIT WAS PERFECT!WORKED
GREAT
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See what our Experts say about this Dexter Trailer Brakes

  • Mounting Bolt Pattern and Center Hole Diameter For Dexter Trailer Brake Assemblies 23-248 and 23-429
    The Dexter Electric Trailer Brake Assembly # 23-429 & # 23-428 have a center opening of 3-7/8" for fitting on the axle tube. It will mount to bolt holes that are 3-5/8" spread left to right and 4-3/8" top to bottom. I have included images below with both measurements to help you identify the fitment. We also have them as a Set # 23-428-429 since you will will being replacing them on multiple axles. If these will not fit your current axles please let me know your mounting pattern and the...
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    Image 1 for Image 2 for
  • Brakes for Dexter 008-395-80 7,200 lb Hub and Drum Assembly
    Sorry Doug, you're right. I went off of the 7k axle rating and didn't thoroughly check, sorry about that. Those are 7,200 lb hubs that use 12-1/4" x 2-1/2" brakes. I'm not sure if there are self-adjusting, we only have the manual adjust brakes like # 23-428-429 that fit that drum size.
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  • Looking for Brake Assemblies for Dexter 7,200 lb Trailer Axle
    Hey Steve, thanks for getting me that info. Based on that the correct brake assemblies would be the part # 23-428-429 for your Dexter 7200 axles. What trailer do you have?
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  • Dexter Replacement Brake Assemblies that are 12-1/4 inch by 2-1/2 inch
    That's an 8k rated Dexter brake assembly for the right hand side of the trailer which we offer with the part # DX52QR for just the one assembly or part # 23-428-429 for both the right and left side.
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  • Mounting Hole Pattern for Dexter 12 x 2 Electric Drum Brake 23-105-09
    Most of our 12 x 2 electric drum brake assemblies like Dexter left/right kit # 23-112-113 use a 5-bolt mounting pattern but the Dexter brake kit # 23-105-106-09 has both 4-bolt and 5-bolt mounting holes. I went to our warehouse and measured the spacing of the 4 bolt holes. You can see this center-to-center hole spacing in the photo I prepared for you. Please note that we do have a brake in a similar size, 12-1/4 x 2-1/2, for a 7200-lb axle that uses a 4-bolt pattern. This is brake set...
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    Image 1 for Image 2 for
  • What Trailer Brakes Do I Need For My Gatormade Aardvark Trailer
    The brakes that you will need for your Gatormade Aardvark is the Dexter Electric Trailer Brake Kit - 12-1/4" - Left and Right Hand Assemblies - 7,200 lbs, part # 23-428-429. I have included a product description link and a video demo link below.
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  • Electric Trailer Brakes for 6,000 lb or 7,200 lb Axle
    The only way to know for sure what the capacity is of your axle is to contact the manufacturer with the serial number, but since you said they are 3 inch round axles, you are correct they will almost certainly be either 6,000 lb, 7,000 lb, or 7,200 lb axles. We can actually get you set up with new electric brakes based on the size of your hub and drum. You just need to measure the inside diameter and depth of your drum, as well as know the brake flange mounting bolt pattern to be sure....
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  • Dexter 7,200 Pound Axle Hub and Drum Assembly with 5/8 Inch Wheel Studs
    We have Dexter 8 on 6-1/2 Hub-and-Drum Assembly for 7,200-lb Axle - 9-Bolt and Newer 4-Bolt Brake Flange Item # 8-393-6UC3-A. It uses inner bearing 25580 and outer bearing 02475. This hub is compatible with 12-1/4 by 2-1/2 inch brakes # 23-428-429 which have a 4-bolt mounting pattern.
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  • Is Dexter Electric Trailer Brake Kit for 7,200 lb Axles for One Axle or Two
    The Dexter Electric Trailer Brake Assembly - 12-1/4" - Left Hand # 23-428 is just one left hand brake assembly; the other side is the Dexter Electric Trailer Brake Assembly - 12-1/4" - Right Hand # 23-429. That is for one axle, and you can order them as a unit with the Dexter Electric Trailer Brake Kit - 12-1/4" - Left and Right Hand Assemblies - 7,200 lbs # 23-428-429. For an adjustment spoon you will need the Brake Adjustment Spoon for Drum Brakes # W80630, and the correct mounting...
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  • Testing and Replacing Brakes on a 2012 Carriage Cameo Trailer
    I've attached an article to help you test the magnets. You also should inspect the wiring for the brake that's giving you issues. If you need to replace the brake you don't have to do both. However, it might be easier in the long run and if the others are showing wear it's a good idea. It can save you time and money later. To determine which brakes to get you can measure the inside diameter of your drums. If they're 12 inch drums then I recommend using # AKEBRK-7-SA. These are self-adjusting...
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    Image 1 for
  • Replacement Hub and Drums For PJT Trailer With 008-393-03 Installed
    Thanks for all of the information on your PJT Trailer! Based on your drum part number you have a 12-1/4" Drum that is oil bath. The Dexter # 8-393-4UC3 is almost right, but it is designed for grease and not oil. You will need the # 8-393-4UC3 and oil seal # 10-63 for each hub. This hub does not include the bearings so you will also need new inner bearing # 25580 and outer bearing # 02475 for each hub. If you need replacement brakes now or in the future you will need # 23-428-429 for...
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  • Trailer Brakes Compatible with 12x2 inch or 12-1/4x2-1/2 Inch Hubs
    We have a fit for 12x2 inch hubs or 12-1/4x2-1/2 inch hubs. The Dexter Electric Trailer Brake Kit - 12-1/4" - Left and Right Hand Assemblies - 7,200 lbs # 23-428-429 is the only fit we have for the larger hubs and it has a 4 bolt versus 5 bolt brake flange connection, but we have both electric or hydraulic options for the 12x2 inch hubs. I've linked the page to all those options.
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  • Mounting Bolt Pattern for Dexter 12-1/4 x 2-1/2-Inch Electric Drum Brake Assemblies
    All of our 12-1/4 x 2-1/2-inch brake assemblies use a 4-bolt mount. These appear on the linked page. We have none with a 9-bolt flange mounting pattern. I did check with several of our install and technical staff and I learned that some brake assemblies will use a backing plate that has extra holes, holes not intended for mounting purposes.
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  • Is The Distance Between Races On Dexter Hub 8-285-11 and 8-393-6UC3-A The Same?
    I had our warehouse measure the distance between the inner and outer races of the Dexter Trailer Hub and Drum # 8-285-11 and # 8-393-6UC3-A and they found that both of them have the exact same 1-3/4" measurement, so as long as you have the # 25580 inner bearing and # 02475 outer bearing combination either hub will fit fine. You will just need to match the hub to the correct brake assemblies as the # 8-285-11 uses 12-1/4" x 3-3/8" brake assemblies # 23-434-435 where the # 8-393-6UC3-A uses...
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Do you have a question about this Trailer Brake?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Written by:
Alexander C
Employee Ryan F
Written by:
Ryan F

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