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  1. Trailer Brakes
  2. Dexter
  3. Electric Drum Brakes
  4. 9000 lbs Axle
  5. 10000 lbs Axle
  6. 12-1/4 x 3-3/8 Inch Drum
Dexter Nev-R-Adjust Electric Trailer Brakes - 12-1/4" - Left/Right Hand Assemblies - 9K to 10K

Dexter Nev-R-Adjust Electric Trailer Brakes - 12-1/4" - Left/Right Hand Assemblies - 9K to 10K

Item # 23-450-451
Our Price: $719.17
Trailer Brakes
Shipping Weight: 39 lbs
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These brakes automatically adjust as you tow so you don't have to crawl around on the ground to do it manually. 12-1/4" x 3-3/8" Assemblies fit 16" or larger wheels. Backing plate has a 7-bolt pattern. Made in the USA. Great Prices for the best trailer brakes from Dexter. Dexter Nev-R-Adjust Electric Trailer Brakes - 12-1/4" - Left/Right Hand Assemblies - 9K to 10K part number 23-450-451 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (25)
  • Q & A (0)
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Dexter Trailer Brakes - 23-450-451

  • Electric Drum Brakes
  • 9000 lbs Axle
  • 10000 lbs Axle
  • 12-1/4 x 3-3/8 Inch Drum
  • 16 Inch Wheel
  • 16-1/2 Inch Wheel
  • 17 Inch Wheel
  • 17-1/2 Inch Wheel
  • Standard Grade
  • Self Adjust
  • Dexter

These brakes automatically adjust as you tow so you don't have to crawl around on the ground to do it manually. 12-1/4" x 3-3/8" Assemblies fit 16" or larger wheels. Backing plate has a 7-bolt pattern. Made in the USA.


Features:

  • Self-adjusting brakes let you maintain optimal braking power at all times
    • Ensures reliable contact between the brake shoes and drums
    • Prevents uneven wear on brake shoes
    • Allows for the perfect setting thanks to the fine-tooth star gear
  • 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
  • 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
  • Durable magnets ensure consistent braking power
    • Encased in a stamped steel housing
  • Left-hand (driver's-side) and right-hand (passenger's-side) brake assemblies included
    • Mounting bolts and hardware sold separately
  • CSA certification ensures quality
  • Made in the USA


Specs:

  • Application: most standard hub-and-drum assemblies, including etrailer, Dexter, and Lippert (LCI)
  • Dimensions: 12-1/4" diameter x 3-3/8" wide
  • Mounting flange bolt pattern: 7 bolt
  • Wheel size: 16" or larger
  • Axle rating: 9,000 lbs - 10,000 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.


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.


Self-Adjusting Brakes Don't Require Routine Maintenance

With standard electric brake assemblies, you need to manually adjust them every now and then to make sure you're getting the shortest stopping distance every time you tow.


A trailer drum brake with a red callout shows the location of a tension cable and pulley on a self-adjusting trailer brake.

With self-adjusting brakes, though, you'll always have peak stopping power - simple as that! As the brake pads wear over time, a tensioning cable will automatically keep the pads in alignment so they'll consistently make contact with your drum when you brake. You won't have to do tedious manual adjustments anymore.


Thoroughly Tested for Safety

Dexter invests a lot of resources to ensure that these brakes meet the requirements for certification set by the Canadian Standards Association (CSA). Basically, a CSA certification tells you that these trailer brakes are well built and safe for use on the road.


How to Break In New Brakes

Once you get these brakes installed, 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.



23-450 Dexter Electric Brake Assembly - LH - Driver Side - 12-1/4" x 3-3/8" - Self-Adjusting - 9,000 lbs to 10,000 lbs

23-451 Dexter Electric Brake Assembly - RH - Passenger Side - 12-1/4" x 3-3/8" - Self-Adjusting - 9,000 lbs to 10,000 lbs





Customer Satisfaction Score:


Customer Reviews

Dexter Nev-R-Adjust Electric Trailer Brakes - 12-1/4" - Left/Right Hand Assemblies - 9K to 10K - 23-450-451

Average Customer Rating:  4.8 out of 5 stars   (25 Customer Reviews)

These brakes automatically adjust as you tow so you don't have to crawl around on the ground to do it manually. 12-1/4" x 3-3/8" Assemblies fit 16" or larger wheels. Backing plate has a 7-bolt pattern. Made in the USA.

by:

Exact fit for Dexter d1012 axle. Thank you etrailer for your research in knowing what I needed!



by:

Very responsive and great service.



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great service, fast shipping... thank y ou!!



by:

My name is Albert, I recently ordered a set of electronic brakes for my trailer(2 10,000 lbs axles). The product and service was outstanding. Greg was the representative I dealt with he was very patient, helpful and supportive as this process was new to me. As a result of such helpful service the next few days I ordered all new bearings and seals for my axles. I consider the company great to work with in getting you what you need and getting it right the first time



by:

Etrailer was very easy to work with. I changed my order and then changed it back and staff was friendly and helpful everytime I called. Packages were on back order and I was notified of how long and product was here right when they said it would be.



by:

Customer service is always spot on! Be aware that this kit does not come with new hardware (bolts & nuts) and it does not come with a backer plate. Make sure you save the old stuff.



by:

Quinn was Awsome,I had an situation,many thing had to come together,he pulled it off for me,great addition to the etrailer team,thanks again



by:

Didn’t install product yet but e trailer delivered complete trailer order 1 day early and it’s complete will install tomorrow. Thanks e trailer and staff great job



by:

Fast shipping and great customer service will definitely be ordering my parts through them from now on



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Received early. Thanks



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Perfect fit



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Extremely pleased’n



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AWESOME customer service and fast delivery of products!! Thank you! Will be doing business with you again!!!



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Arrived faster than what they said. Great service



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exactly what i was looking for came on time



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Perfect fit



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See what our Experts say about this Dexter Trailer Brakes

  • How To Adjust Brakes When The Shoes Are Too Far Apart To Get A Drum Back On
    The Dexter Self-Adjusting Brakes you have ( # 23-450-451) can actually be adjusted when removing and reinstalling, so you will not have to use a sledge hammer again. You will need to go to the back side of the brake to get access to the adjuster, which I included a picture of for reference. Using a slot screwdriver, or a brake adjuster spoon like the # W80630 if you have one, you will need to back it off a little at a time until the drum slides on. I also included an article that has...
    view full answer...
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  • Replacement Bearings For Dexter Model D1012 Axle
    Thanks for the picture! I sent that over to my contact at Dexter and your axle uses the following components: Inner bearing # 387A Inner race # 382A Outer bearing # 25580 Outer race # 25520
    view full answer...
    Image 1 for
  • Do All Dexter Brakes Have Same Bolt Hole Pattern
    Definitely not; the Dexter Electric Trailer Brake Kit - 2,000 bs # 23-47-48, 3,500 lbs # 23-468-469 and 8,000 lbs # 23-434-435 fit a 4-bolt brake mounting flange. The Dexter Electric Trailer Brake Kit- 6,000 lbs # 23-105-106 and 7,000 lbs # 23-464-465 fit a 5-bolt brake mounting flange. The Dexter Electric Brake Kit - 9,000 lbs to 10,000 lbs # 23-450-451 fit a 7-bolt brake mounting flange.
    view full answer...
  • Replacement Hubs and Bearing Parts For a Dexter 10,000LB General Duty Axle Prior To July 2009
    Your Dexter axle is a 10,000lb general duty axle that was manufactured on 1/31/01. That is all information I was able to obtain from Dexter due to the age of the axle. It will use either the Dexter Trailer Idler Hub # 8-288-3UC1 or the Dexter Trailer Hub and Drum Assembly # K08-288-90 with the Dexter Electric Brake Kit # 23-450-451. If you are looking for a bearing kit you will need to get the following components as we do not have a kit with everything you need. Inner Bearing # 387A Inner...
    view full answer...
  • Replacement Brake Assemblies for Dexter 10,000 lb Trailer Axles
    How is the adjustment of the assemblies? Typically the problem you are having is due to the assemblies not being adjusted properly. Ideally they are tight enough that there's a light drag as you turn them by hand. To see how to manually adjust trailer brake assemblies check out the video I attached, fast-forward to the 4:35 mark of the video. Since we know you have 10k Dexter axles the correct brake assemblies are the part # 23-450-451 for if you have an electric brake setup or part...
    view full answer...
  • Electirc Brake Kit AKEBRK-8 Dimensions and Slipper Springs for 9,000 Pound Axle
    The measurements for the mounting holes on the # AKEBRK-8 are 3-5/8" across left to right on center and 3-7/16" top to bottom on center. The diameter of the pilot hole is 3-3/4", and the overall dimensions are 12-1/4" diameter x 3-3/8" wide. The axle rating for these trailer brakes is 8,000 lbs. When picking out the correct brake assemblies for your trailer you want to measure the inner diameter of your hub/drums and the depth of the drums. This information will allow you to find the...
    view full answer...
    Image 1 for Image 2 for Image 3 for Image 4 for
  • Replacement Brakes, Hubs and Drums For Dexter 10K General Duty Prior To July 2009 With 9-44 Drums
    Your Dexter Trailer Brake Drum # 9-44-1 is designed to fit the Dexter Trailer Idler Hub Assembly # 8-288-3UC1. This drum and hub installs on 9,000-lb to 10,000-lb general-duty Dexter axles made prior to July 2009. The hub assembly includes all the bearings, races, seal and oil cap for the one hub. You will need 2 hubs and 2 drums per axle and some Kodiak Synthetic Bearing Oil # XLPROLUBE to fill the hub. The Dexter Electric Brake Kit # 23-450-451 contains the brake assemblies for both...
    view full answer...
  • Bearings, Races and Oil Seals For Dexter 10K Axle On a 2018 Big Tex 22GN Trailer
    When you replace your Brakes # 23-450-451 it is a good idea to inspect the bearings at that time. The bearings and races will only need to be replaced if they are damaged or grooved. A visual inspection of the seal will tell you if it leaking or you notice any damage to the seal. Depending on if your Dexter 10K axle is a general duty or heavy duty will decide the bearings and oil seal you will need. If you are unsure you can send me the axle serial number that is stamped in the rear portion...
    view full answer...
  • Replacement Electric Brake Assemblies For 10,000LB Dexter Axles On Big Tex 22GN Gooseneck Trailer
    The Dexter Electric Brake Kit # 23-450-451 are the brakes used on the 10,000LB Dexter axles that are found under the Big Tex 22GN Gooseneck Trailer. You will need 2 sets to replace all 4 of the brakes on your trailer. If you want to replace any of the bearings or oil seals while you will have them off to replace the brakes I can confirm the correct parts needed if you can provide me with the serial numbers off your axles.
    view full answer...
  • Replacement Electric Brake Assemblies For a 2018 Big Tex 22GN Trailer With 10K Dexter Axles
    The Dexter Electric Brake Kit # 23-450-451 are the brakes you will need for your 2018 Big Tex 22GN with the 10,000lb Dexter axles. These are sold per axle so you will need 2 sets to replace all 4 of your brake assemblies. They are also sold individually as the Left # 23-450 and Right # 23-451 if you have a need to only replace one in the future. With self adjusting brakes like these it is more common for them to all wear evenly and need replaced at the same time.
    view full answer...
  • Replacement Brake Shoes for Dexter Assemblies # 23-450-451
    For the brake assembly set part # 23-450-451 that you have the shoes you need are # BP04-240 for the driver side and part # BP04-250 for the passenger.
    view full answer...
  • Brake Assemblies and Bearing Replacement for 2015 Big Tex with 10k Dexter Axles
    Since we know your 2015 Big Tex has Dexter 10k axles the brake assembly set you need for each of your 10k Dexter axles is the part # 23-450-451. This set of left and right assemblies is exactly what your Dexter axles need and they are self adjusting as well. Then for bearings you'd want the part # 387A and # 25580 and you'd be set.
    view full answer...
  • Comparing 77-1210-2 and 23-450/23-451 Trailer Braking Assemblies
    The 77-1210-2 braking assembly and 23-450/23-451 braking assembly are different sizes from my research, the former measures 12" x 3-3/8" whereas the latter measures 12-1/4" x 3-3/8". If you're looking for replacements we have the Dexter Electric Trailer Brake Kit part # K23-532-533-00 for the 77-1210-2 braking assembly and the Dexter Electric Brake Kit part # 23-450-451 for the 23-450/23-451 braking assembly. Please note, the 77-1210-2 braking assembly is for AL-KO and Hayes axles and the...
    view full answer...
  • Replacement Parts For Dexter 10,000LB Trailer Axle On 2019 PJ Trailer
    Your Dexter axle SN 125272197 came with the Dexter Electric Brake Kit # 23-450-451. It uses the following bearings and seals. Inner Bearing # 387A Outer Bearing # 25580 Inner Race # 382A Outer Race # 25520 Oil Seal # 10-51 Oil Cap # RG04-300
    view full answer...
  • Replacement Brake Assemblies for Big Tex 22N Trailer
    I looked up your Big Tex 22N and was able to determine that it has 10k Dexter axles so for brake assemblies you'd wan the part # 23-410-411 for if you have hydraulic brakes or # 23-450-451 for electric and you'd be set.
    view full answer...
  • Replacement Drum Brakes Assembly for 10,000 lb Dexter Axle
    We have drum brake assemblies for your 10K Dexter axles. If you want the electric assemblies, we have the Dexter Electric Brake Kit - Self-Adjusting - 12-1/4" - Left/Right Hand Assemblies - 9K to 10K # 23-450-451 if your hubs are 12-1/4 by 3-3/8 inches. If your hubs are the 4 inch width, then you will use the Dexter Electric Trailer Brake Kit # 23-438-439. If you have hydraulic brakes we have the following: # 23-410-411 for 12-1/4 x 3-3/8 inch drum # K23-524-00-2 for 12-1/4 x 3-1/2...
    view full answer...
  • Recommended Replacement Oil Seal For A 2015 Big Tex 22GN Trailer
    From what I could find out, the Big Tex 22GN tandem axle trailers use 10,000 pound axles. However, this is the brand new ones so I highly recommend double checking this with Big Tex if you are unsure. They will need the VIN for your trailer, so have that near by. If they confirm this information or if you are already sure you have 10,000 pound axles, it does narrow the search down to 2 options. First is the # 10-51. This will have an inner diameter of 2.875" and an outer diameter of 3.880"....
    view full answer...
  • Replacement Dexter Electric Brakes for Trailer with 9,000 or 10,000 Pound Axles
    For the axles on your trailer, I recommend the Dexter Electric Brake Kit # 23-450-451. These are self-adjusting brake assemblies that measure 12-1/4 inches x 3-3/8 inches. These particular brake assemblies are designed for 9,000-10,000 pound Dexter axles, so they will work great whether you actually have a 9,000 pound or 10,000 pound axle on the trailer. To ensure they will fit perfectly, you can take a couple of quick measurements on your existing drum to verify they are 12-1/4 inches...
    view full answer...
    Image 1 for
  • Replacement 12 Inch Brake Assemblies for Redline EB01-140 and EB01-145 From Dexter Axle
    The EB01-140 and EB01-145 are Redneck Trailer Supply part numbers for a Dexter 12-1/4 x 3-3/8 7-bolt brake assemblies for a 9-10K axle. The proper replacements are available as part # 23-450-451, which includes the left and right self adjusting brake assembly. The mounting hardware is available separately as part # BRKH122510.
    view full answer...
  • Recommended Hub and Brakes for a 10,000 lbs AL KO Axle
    In order to figure out what drums your 10,000 lbs AL KO axle needs you're going to need to pull one of your current hubs off and check the numbers stamped into the sides of your bearings. If you are unable to find them you will need to take a couple of measurements. You will be looking for the inner diameter of the bearings. You can measure the bearings, or where they ride on the spindle, using a digital caliper like item # PTW80157. Once this is done you will be able to match them up...
    view full answer...
    Image 1 for
  • Correct Replacement for Dexter Hub/Drum 8-415
    I was able to cross reference the Dexter Hub/Drum 8-415 to the Dexter Trailer Hub Drum Assembly part # 8-430-5UC3 which should be an exact replacement. I don't have any depth measurements of the above/drum but what you would need to measure to confirm is the inside of the contact surface on the hub where the shoe rides and this should measure 12-1/4" x 3-3/8". If so, you should be good to go. In regards to braking assemblies, the best option we have is the Dexter Brake Kit part # 23-450-451...
    view full answer...
  • Will Electric Brake Assemblies Work Without A Magnet
    If you're saying that one of the wire clips isn't there but the magnet for your brake assembly # 23-450-451 is still in place then yes, the brake assembly with still work. If you're saying there's no longer a magnet at all then no, the brake assembly will not work. When your brake controller sends the signal back to brake assembly it energizes the magnet clamping it onto the hub and expanding the brake shoes so that they make contact with the drum to slow the trailer down. If you're needing...
    view full answer...
  • Replacement Recommendation for AL-KO 12-1/4" Electric Brakes
    To replace your 10K AL-KO electric brakes you'll need the Dexter Electric Brake Kit # 23-450-451 which are self-adjusting 12-1/4" x 3-3/8". These are also available as 12-1/4" x 4" brakes with the kit # 23-438-439 instead. Dexter Axle owns AL-KO so while these are branded as "Dexter" brakes, they are essentially the same thing. Attached are some videos for you to check out.
    view full answer...
  • Electric Brake Kit to Fit with Dexter Trailer Brake Drum for 9,000-lb to 10,000-lb Axles
    The electric brake kit you need to work with the Dexter Trailer Brake Drum for 9,000-lb to 10,000-lb Axles # DX64FR is as follows: - Dexter Nev-R-Adjust Electric Trailer Brakes # 23-450-451 This comes with both the left hand and right hand assemblies, and can be installed using the Mounting Bolts and Hardware # BRKH122510 if your hardware needs to be replaced.
    view full answer...


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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 Alexander C
Written by:
Alexander C
Employee Ryan F
Written by:
Ryan F

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