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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
Dexter

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

Part Number: 23-428-429
In Stock
$718.36
Trailer Brakes
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23-428-429 - 7200 lbs Axle Dexter Electric Drum Brakes
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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

  • Electric Drum Brakes
  • 7200 lbs Axle
  • 12-1/4 x 2-1/2 Inch Drum
  • 16 Inch Wheel
  • 16-1/2 Inch Wheel
  • 17 Inch Wheel
  • 17-1/2 Inch Wheel
  • Standard Grade
  • Manual Adjust
  • Dexter

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.


Features:

  • Parking-brake-ready brakes let you park your trailer more safely
    • Perfect for pop-up campers, overlanding, and agricultural applications
    • Requires tongue-mounted activating lever and cables (not included)
  • Easier to install and gives you more control than hydraulic brakes
    • Requires only an electric brake controller (sold separately) - no actuator or hydraulic lines needed
  • Periodic manual adjustment required
    • Can be done in minutes
  • Long-lasting brake pads offer excellent braking torque
    • Fully bonded to shoes for more consistent braking compared to riveted pads
    • Tapered edges help minimize stuttering and brake lockup
  • Adjuster plugs (included) protect internal components from dirt, grime, and road debris
  • Left-hand (driver's-side) and right-hand (passenger's-side) brake assemblies included
  • Made in the USA


Specs:

  • Application: most standard hub-and-drum assemblies, including etrailer, Dexter, and Lippert (LCI)
  • Dimensions: 12-1/4" diameter x 2-1/2" wide
  • Mounting flange bolt pattern: 4 bolt
  • Wheel size: 16" or larger
  • Axle rating: 7,200 lbs
  • Limited 5-year warranty


Quick Tip: There's really not a whole lot to getting new drum brakes. If you've confirmed that all of the specs listed above line up with what you need for your trailer, you can be pretty sure these will work for you.


Ready to Roll When You Are

If you're looking to customize your off-road trailer or pop-up camper, these brakes can be a great way to do that.


a greyscale diagram shows how a manual parking brake cable is installed on the back of an electric parking brake assembly

Installing these brakes is easy, and using them is even easier. Run the linkage cable from your tongue-mounted handbrake (not included) to the lever on the backing plate of the assembly as shown above. Then, just pull on the handbrake any time you need a little reassurance that your valuable cargo won't roll away from you.


High-Quality Brake Pads

Riveted brake pads will always give you a screeching reminder to replace your brake shoes. That's because the rivets will scrape against your drum as the friction material wears down. You won't have that noisy problem with bonded brake pads. You'll also get a little more friction pad contact because there aren't any cutouts for rivets. And more friction means more stopping power.


A close-up shot of a drum brake shows a tapered brake pad.

These pads are also tapered, which should help to prevent any broken, crumbly bits of material from rotating inside the drum as the pads wear over time. Brakes without these tapers are more likely to create a jarring braking experience that could cause the brakes to stutter and lock up.


How to Manually Adjust Trailer Brakes

The more miles you put on your trailer, the more your brake pads will wear down. As they lose contact with the drum, stopping distances get longer and longer. To keep your brakes working great, it's important to adjust them pretty routinely. For this job, grab a floor jack and either a brake adjustment tool (sold separately) or just a standard flathead screwdriver.


Jack up your trailer enough to get the wheel(s) off the ground. Remove the adjuster plugs from the backing plate on the brake, and insert the flat end of the tool through the back of the assembly.


Screenshot from an instruction video shows how to manually adjust the the alignment on a drum brake

Push in on the star gear and lift it up. Keep doing this until the brake pads catch on your drum. When you can't spin your wheel by hand anymore, back the gear off by about 10 clicks by pushing down on the star gear. Does the wheel now spin freely (even if it sounds like the brake pads drag slightly on the drum)? Great! Then you're all done with that one and ready to adjust the rest.


How to Break In New Brakes

After you get these brakes installed and adjusted, you'll need to break them in. First, find a long stretch of road or a big, empty parking lot. Once you're there, set your brake controller to its maximum setting and get moving. Speed up to about 40 mph and brake to slow to about 20 mph. Repeat this 15-30 times. The goal is to get the brake shoes and magnet properly seated into your drum. You'll know you've done that when it feels less jerky (and more consistent) each time you apply the brakes.


Note: The brakes will be very hot after doing this, so after every 10 stops you'll want to wait about 10 minutes to let the brakes cool off before continuing. If you don't, you might cook and crack the pad material.



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:


Customer Reviews

Dexter Electric Trailer Brakes - Parking Brake Ready - 12-1/4" - Left/Right Hand - 7.2K - 23-428-429

Average Customer Rating:  4.9 out of 5 stars   (20 Customer Reviews)

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.

by:

Had what we needed Shipped day order was placed. Received day was told to expect. What more could you ask.



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 customer service I had issues with the box the hub was in and they shipped out missing part right away



by:

Everything went easy ,and brake backing plates where exactly what I ordered an delivered on time



by:

It makes the trailer stop



by:

Ordering was easy. Brakes arrived promptly.very well packaged.



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Parts look good, have not installed them yet



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GREAT JOB JUSTIN!
FIT WAS PERFECT!WORKED
GREAT



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See what our Experts say about this Dexter Trailer Brakes

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  • Mounting Bolt Pattern and Center Hole Diameter For Dexter Trailer Brake Assemblies 23-248 and 23-429
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    Image 1 for Image 2 for
  • 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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  • 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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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
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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