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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: $720.07
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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Arrived faster than what they said. Great service



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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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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

  • Difference Between etrailer Electric Trailer Brakes And Dexter Electric Trailer Brakes
    The differences between the Electric Trailer Brake Kit w/ Dust Shields # AKEBRK-10 and the Dexter Electric Trailer Brake Assembly # 23-450 are the different manufacturers and that the # AKEBRK-10 have dust shields, and the # 23-450 does not. Also # 23-450 is just the driver side brake assembly, where # AKEBRK-10 includes the driver and passenger side brake assemblies. If you wanted the Dexter Kit you would need the Dexter Electric Brake Kit # 23-450-451 which includes both brake assemblies. Both...
    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...
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  • Backing Plate for Electric Brakes on 10k Axles
    The only backing plate we have that would work with a 10k axle is the # BP15-085. This is designed for 9,000-10,000 lb electric brake assemblies. We don't have anything for 12k. The backing plate fits the Dexter # 23-450-451. However, this uses a 7-bolt brake flange pattern. I recommend double checking your bolt pattern to make sure it is actually 6. There are some older obsolete axles that have this bolt pattern but there are no longer replacement brakes that would match. If that is...
    view full answer...
  • Replacement Brake Assemblies for 2019 Big Tex Gooseneck Trailer
    The Dexter Electric Brake Kit # 23-450-451 are the brakes you will need for your 2019 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.
    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
  • Brake Assembly Recommendation for BigTex 20ac With 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.
    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...
  • Replacement Brake Assemblies for Dexter 8-10k Axles
    We do not have any trailer brake magnets that are rated for that high of an axle. We do have the Dexter brake assemblies part # 23-450-451 which are a replacement set of assemblies for 9k or 10k axles by Dexter. For an 8k assembly we have the part # 23-435 for the right hand side and part # 23-434 for the left hand side.
    view full answer...
  • 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...
    Image 1 for Image 2 for
  • Does the Oil Seal On a Dexter 10K Hub Need To Be Replaced After Removing
    I think you are asking if the oil seal must be replaced each time the drum is removed and if that is the case then no, the oil seal if in good condition can be reused. For replacement braking assemblies you can use the Dexter Electric Brake Kit part # 23-450-451 which are self-adjusting. If you just want to replace just the lining that is an option as well using part # BP04-255 and part # BP04-245.
    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 Trailer Brakes For Dexter 023-451-00 Electric Drum Brakes
    The Dexter Electric Trailer Brake Assembly # 23-451 being the part number 023-451-00 that you referenced is a right side brake assembly. The Dexter Electric Trailer Brake Assembly # 23-450 is the matching left side brake assembly. This is available as a kit # 23-450-451 since I always recommend changing brakes as a set. We have the etrailer Electric Trailer Brake Kit # AKEBRK-10 which will can also be used. These are the same 12-1/4" x 3-3/8" brakes pads as the Dexter brand and they are...
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  • What To Do If My Brake Pads Are Breaking Into Pieces?
    It is completely normal for brakes to get warm when towing. Especially if you are doing a lot of braking, heat is natural. Now if the brake pad is falling apart, that is something you will want to address. Having pieces of brake shoe inside the drum could definitely cause excess friction/heat. You may still get decent braking power, but less brake pad = less braking power. Also I would be concerned that you may continue to lose pieces of the brake shoe over time. At this point I recommend...
    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...
  • 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 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
  • 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...
  • Replacement Brake Shoes and Assemblies For a Dexter 9,000LB General Duty Axle
    We do carry the Dexter Electric Brake Kit # 23-450-451 which are self adjusting electric brakes for a 9K or 10K general duty axle. We do have the Right # BP04-255 and Left # BP04-245 12-1/4" X 3-3/8" replacement brake shoes for electric brake assemblies if you are only needing the shoes themselves. If you have the Dexter Hydraulic Drum Brake Kit # 23-410-411, we also have the Right # BP04-270 and Left # BP04-260 replacement shoes.
    view full answer...
  • Replacement Brake Assemblies For a Big Tex 22GN Trailer with 10K Dexter Axles
    Yes, the Electric Trailer Brake Kit # AKEBRK-10 can be used to replace the Dexter Electric Brake Kit # 23-450-451 that comes on a Dexter 10K axle. If you are needing any bearings or grease seals for this axle on your Big Tex Trailer I can confirm the parts used if you can provide me with the serial number found on your axle.
    view full answer...
  • Replacement Brake Assemblies for Trailer with Dexter 10k Axles
    If you can measure the width of your current brake assembly pads I can get you the correct brake assembly set for your Dexter 10,000 lb axles. If the pads are 3-3/8 inches wide you'd want the part # 23-450-451 or if they are 4 inches wide you'd want the part # 23-438-439. I tried looking up the numbers on the tag you sent a picture of and was not able to find anything.
    view full answer...
    Image 1 for
  • Replacement Brake Assemblies for Rockwell 10k Trailer Axle
    Rockwell trailer axles use standard trailer brake components so yes a 10k Dexter brake assembly like 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.
    view full answer...
  • Can Dexter 10k Disc Brake Setup be Converted to Electric Drum Brake
    Yes, you can replace the hub and brake components of a Dexter 10k axle with drum components to convert it to electric drum brakes. For that you'd need the hub/drums part # 8-430-5UC3 and then for the brake assemblies # 23-450-451 and you'd be set in that regard. You'd need to run 10 gauge or thicker wire to each assembly which we offer with the part # 10-1-1.
    view full answer...
  • 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...
  • 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...


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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 Wilson B
Updated by:
Wilson B
Employee Alexander C
Written by:
Alexander C
Employee Ryan F
Written by:
Ryan F

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