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  1. Trailer Brakes
  2. Dexter
  3. Electric Drum Brakes
  4. 8000 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 Brake Kit - 12-1/4" - Left and Right Hand Assemblies - 8,000 lbs
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Dexter

Dexter Electric Trailer Brake Kit - 12-1/4" - Left and Right Hand Assemblies - 8,000 lbs

Part Number: DX32QR
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$657.48
$637.48 after $20.00 Mail-In Rebate
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12-1/4" x 2-1/2" Driver's-side and passenger's-side electric trailer brakes fit 8,000-lb axles. Mounting flanges have a 4-bolt pattern. Fit 16" or larger wheels. Great Prices for the best trailer brakes from Dexter. Dexter Electric Trailer Brake Kit - 12-1/4" - Left and Right Hand Assemblies - 8,000 lbs part number DX32QR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Videos (1)
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Dexter Trailer Brakes - DX32QR

Highlights

  • Bolts Right On: Left and right assemblies mount to 4-bolt flanges for quick replacement.
  • Controlled Braking: Electric design works with a brake controller for smooth, adjustable stops.
  • DIY Friendly: No hydraulic lines or actuators—just two wires per side for simple hookup.
  • Built for Heavy Loads: Rated for 8,000-lb axles and 12-1/4" x 2-1/2" drums for dependable braking power.
  • Fits Larger Wheels: Designed for 16" or bigger wheels to match common heavy-duty setups.
  • Hardware Your Way: Mounting bolts and hardware sold separately so you can choose what you need.
Made in USA

Features to know about

Upgrade Worn or Failing Brakes: Complete 12-1/4" Electric Assemblies for Confident Stopping

If your old brakes are dragging or weak, this Dexter Electric Trailer Brake Kit gives you a fresh start. Each side comes fully assembled—driver’s-side and passenger’s-side—so all you have to do is bolt them on. With 12-1/4" x 2-1/2" shoes sized for 8,000-lb axles and 16" or larger wheels, these brakes deliver solid, even braking that restores smooth performance and control.

Simplify Your Setup: Electric Design Uses Only a Brake Controller

Hydraulic lines and actuators aren’t needed here. These electric brakes work directly off an in-cab brake controller, giving you easy installation and fine-tuned control from the driver’s seat. Just connect the two wires per assembly and you’re ready to dial in your braking force whenever the load or terrain changes.

Fast, Bolt-On Fit: 4-Bolt Mounting Pattern Matches Common Flanges

Each assembly mounts to a standard 4-bolt brake flange, making it a direct fit where older 8K drum brakes came off. Mounting bolts and hardware are sold separately, but the layout lines up cleanly—no drilling or modification required. It’s a straightforward job for anyone doing a DIY axle service or trailer rebuild.

Built for Heavy Loads: Rated for 8,000-lb Axles

When you’re hauling heavy gear, you want brakes that can keep pace. This kit is rated for 8,000-lb axles, giving you the stout hardware and friction surface area needed for consistent braking under load. It’s a dependable option for anyone towing big equipment or carrying serious weight.

Specs

Dimensions

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

Mounting

  • Mounting flange bolt pattern: 4 bolt

Wheel Compatibility

  • Wheel size: 16" or larger

Weight and Capacity

  • Axle rating: 8,000 lbs

K23-623-00 Dexter Electric Trailer Brake Assembly - 12-1/4" - Right Hand - 8,000 lbs

K23-622-00 Dexter Electric Trailer Brake Assembly - 12-1/4" - Left Hand - 8,000 lbs





Video of Dexter Electric Trailer Brake Kit - 12-1/4" - Left and Right Hand Assemblies - 8,000 lbs
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for A Closer Look at the Dexter Electric Trailer Brake Kit

Hello everybody. This is Jeff at trailer.com. Today I'm gonna take a look at the Dexter 12 and a quarter inch right hand and left hand side self-adjusting electric trailer brake assemblies for 8,000 pound axles. Now these electric brakes are easier to install. They offer more user control than hydraulic brakes. Basically, they only require an electric brake controller, which we do sell separate on our website.

There's no need for any brake actuator, hydraulic lines necessary. The brake shoes themselves they are lined with an automotive grade friction material and that friction material is fully bonded to the shoe. It's not riveted to the shoes. Gives you a lot longer life, more braking tort. And these are self-adjusting brakes which will automatically adjust to deliver optimum performance and braking power.

And the way you can tell they're self-adjusting, you can see this cable that runs around this wheel, attaches to a lever down here that automatically turn the adjustment wheel as needed. There's no need for any manual brake adjustments after the initial adjustment. The proper adjustment leads to a lot better brake efficiency unless we're on your tow vehicle's brakes. Now this kit here will include both the 12 and a quarter inch by two and a half inch side, driver side, and passenger side electric trailer brake assemblies. And when we say 12 and a quarter inch by two and a half inch, what that measurement stands for is the 12 and a quarter inch is gonna be the diameter from this shoe to this shoe.

So you can see if we put a ruler on it there's your 12 and a quarter inch diameter and the two and a half inches is gonna be the width of the brake shoe on the pad. And there's your two and a half inch measurement there. The other thing I wanted to talk about was how you can tell one is a left hand driver's side one is a right hand passenger side. Of course, when you get a new assembly they'll have a sticker there. It'll tell you that.

But if by chance that sticker wasn't on there and you just had to look at it and tell the easiest way is to look at the length of the pad that's on the brake shoe. So if you look at this pad, it goes from here to here and this pad here goes all the way from here to here. This is the longer pad. This is the shorter pad. The shorter pad is your primary shoe which means the primary shoe will always face the front of the trailer. So that's gonna go this way. And that's gonna tell you that this is the left hand driver's side. And same way on the passenger side. The shoe goes from here to here, over here from here to here. This is the longer, this is the shorter. So the shorter faces the front, that's gonna tell you it's the right hand passenger side assembly. Now the mounting hardware to install these assemblies is not included. We do sell those separately. Usually they're listed on this product page as a related product. It does use a brake flange or brake mounting flange bolt pattern of four holes. And these parts are made in the USA. Few specs, again, the application these will fit most standard 12 and a quarter inch hub and drum assemblies. The wheel size that'll fit on these is 16 inches and larger. Now the weight capacity on these assemblies is 4,000 pounds per assembly. So when they're together on the same axle it'll meet your axle rating of 8,000 pounds. And one last thing I also wanna mention you notice on electric brakes you'll see two wires on the back of the brake. Those two wires need to be connected. One goes to a ground, other goes to a brake feed for power and they're the same wires, same color. So you can use either wire for either function. But that's gonna do it for the review on the Dexter 12 and a quarter inch right hand and left hand side self-adjusting electric trailer brake assemblies for 8,000 pound axles.

Customer Satisfaction Score:

Ratings & Reviews

4.8

1748 reviews
5 Stars
(1528)
4 Stars
(136)
3 Stars
(31)
2 Stars
(20)
1 Star
(33)
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Have not installed yet
by:
I'm impressed for a couple reasons- the price very fair and Genuine Dexter Parts- My shoe size for whatever reason is unique, (12.25 x 2.50)and ETrailer had them in stock- these assemblies are upgrades from the factory "manual adjust" junk and will save me time and money over the long term- and lastly, shipping was 2 day... perfect.
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2021 Ram 3500
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Making the call to etrailer was easy. Nice to deal with and I had all the OEM part numbers to insure correct replacements. Tyler got me the parts I needed and once arrived (well packaged) I did my dual axle brake and bearing replacement. Being in this business my entire life, made things easier. Parts were exactly what I needed and although I didn't need to change some items, my 13yr old trailer got some good PM work! Thanks.
by:
After ordering a cheaper off brand from a popular site because of the cheaper price, I looked on etrailer and found Dexter "MADE IN USA". I cancelled the other order and bought these. Ordered on Wednesday. Received on Friday. Professional customer service and original quality part. Don't settle for cheap foreign parts. Buy USA when possible. Buy etrailer. An American,family run company.
David, C. profile picture

David, C.

8/31/2026

Nothing further to add. In this case , thats a good thing. Works as it should with zero problems. Buy USA.

by:
Perfect fit!!! I have Lippert axles on my enclosed snowmobile trailer after two years of use my brakes were very bad rusted up and one had a separate pad floating around in hub. I was happy to be able to put Dexter brake assembly on them and fit perfectly. Looking at them it might be just me but Dexter looks like way higher quality made. At least parts or all of the brake assembly is made in us! I had parts less than 72 hours doing regular shipping every thing was packed good. It’s also awesome that I’m able to get complete bearing kits from you that is timken. Makes life easier
by:
They fit perfectly! I was wondering why my trailer was "pulsing and jerking" very badly every time I put on the brakes. See photo. This fixed the problem!
Nick S. profile picture
Etrailer Expert

Nick S.

11/17/2025

Well I am glad you were able to find the source of the issue and get that fixed! It is great to hear the new ones are working well and fit perfect. What kind of trailer did you install these on?

by:
Would of gave them 5 stars but one of the brake assemblies had a loose spring in the bottom of the box and the two piece adjustment screw was loose in the box also. Put things back together and still had to smack it with a dead blow hammer on one side so it would pop back in place. Hub went on fine after that. No idea who to fault on this issue. I'm sure e trailer would of sent a replacement but i really just wanted to get my trailer out of my garage. Other than that, things went together very easy.
by:
Great parts always delivered quickly. Fresh brakes ready to roll.
Nick S. profile picture
Etrailer Expert

Nick S.

1/19/2026

That is a great setup you got! I am glad the brakes got their quickly and you were able to get them installed. What are you using that trailer for?

by:
Great place to deal with. Brakes arrived quickly and on time. Well packaged.
Michael profile picture

Michael

10/21/2026

Brakes working great, great product

by:
My trailer is a 2004. The pads were cracked and at least one magnet was bad. Replacing the entire brake assembly seemed like the best option. Everything was packaged well and ready to bolt up right out of the box.
I only needed move the adjusters a few clicks.
Would recommend for older trailers that haven't been maintained.
by:
Swapped out all four brake assemblies on our Jacobson trailer. Swap was easy and fit was terrific. I would definitely purchase again. And would recommend to other people should the topic come up.
by:
2015 Honda Pilot
These parts are an exact replacement for my original Dexter brakes. Installation was simple and quick. Etrailer had the best price and free, fast shipping.
by:
It has been a year since my purchase for these brakes. They have been great! I bought these to put on a single car carrier that needed brake shoes before they wore out the drums. Price was the best around and even beat my local trailer service shops. Install was very simple with no issues at all and so far the brakes have held up great. I will continue to buy my trailer parts here. Currently I have 9 trailers that I pull with so trust when I say that I have tried a lot of parts, these have been the best on price and best in class. Trailers include goose neck and bumper pull, dump trailer, 2 single car hauling trailers, a 2 car carrier, jet ski trailer, utility trailer for lawn mowers, an aluminum stock trailer, and a heavy duty trailer for hauling large loads of hay.
by:
I searched for and wide at my local trailer repair and parts shop. Only to find out etrailer.com had what I needed. They fit my application well and would fit others. All size holes and patterns for different applications. The only thing I to buy is bolts or studs to mount them.
by:
Thank you for the quick service that I received. The part fit exactly as they were supposed to. Thanks to you I now have a safe trailer. Thank you
by:
They installed easy and work as expected. I converted a non-brake trailer to have brakes.
by:
Product is as listed but was told would be here Friday the 14th and this was on the 12th, so I rushed to order because my trailer is my life line of work and have been stuck for some time, well they didnt show up on the 14th they ended up coming on the 17th, if I would of know that would of chose different shipping option
by:
Happy with Genuine our Review Dexter Electric Trailer Brakes - 12" - Left/Right Hand Assemblies - 7,000 lbs
by:
My left side brakes were perfect. The right side, however, almost seemed like they had been dropped or something. The brakes shoe was shifted up and both brakes I had to pull springs apart and install the shoe adjuster bolt that was just laying in the box. One of the right side brakes was in a “right side” box but labeled “left side” on the actual brake. Luckily when comparing it to what I removed from my trailer, it was the correct brake, but mislabeled. I was frustrated I needed to mess with the brakes as the whole reason I purchased bolt on was because they should be complete and ready to install.
by:
Ordered two sets of these breaks. Received all left hand brakes. When i called to tell them about the order being messed up, they told me sorry, and to send back two of the left hand brakes and they will rush out the other right hand ones. I asked if there was maybe a discount code they could help me out with for the inconvenience, and they said they don’t do that kind of thing. Oh well. Guess that’s why the parts are so inexpensive, and possibly why the workers don’t get the orders right. You get what you pay for…. And sometimes more than what you bargained for…
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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 Wilson B
Updated by:
Wilson B
Employee Mike S
Written by:
Mike S

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