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  1. Trailer Brakes
  2. Dexter
  3. Electric Drum Brakes
  4. 8000 lbs Axle
  5. 12-1/4 x 3-3/8 Inch Drum
  6. 16 Inch Wheel
  7. 16-1/2 Inch Wheel
  8. 17 Inch Wheel
  9. 17-1/2 Inch Wheel
Dexter Nev-R-Adjust Electric Trailer Brakes - 12-1/4" - Left/Right Hand Assemblies - 8K

Dexter Nev-R-Adjust Electric Trailer Brakes - 12-1/4" - Left/Right Hand Assemblies - 8K

Item # 23-434-435
Our Price: $771.02
Trailer Brakes
Shipping Weight: 39 lbs
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Dexter Trailer Brakes - 23-434-435
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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 4-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 - 8K part number 23-434-435 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (14)
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Dexter Trailer Brakes - 23-434-435

  • Electric Drum Brakes
  • 8000 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 4-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: 4 bolt
  • Wheel size: 16" or larger
  • Axle rating: 8,000 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 typical electric brake assemblies, you need to manually adjust them every now and then to make sure you're getting the shortest stopping distances 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.



    23-434 Dexter Electric Brake Assembly - LH - Driver Side - 12-1/4" x 3-3/8" - Self-Adjusting - 8,000 lbs

    23-435 Dexter Electric Brake Assembly - RH - Passenger Side - 12-1/4" x 3-3/8" - Self-Adjusting - 8,000 lbs





    Customer Satisfaction Score:


    Customer Reviews

    Dexter Nev-R-Adjust Electric Trailer Brakes - 12-1/4" - Left/Right Hand Assemblies - 8K - 23-434-435

    Average Customer Rating:  4.3 out of 5 stars   (14 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 4-bolt pattern. Made in the USA.

    by:

    Fit like a glove. Easy to install. Have good braking power restored.



    by:

    Got the wrong part, brake inside box didn't match # on outside of box , have to return and reship. One brake was correct the other wasn't.please check part inside box to make sure it's the right part before shipping again . Asked Ashley to do this on phone, she seemed annoyed that I requested this.



    by:

    These were delivered quickly and well packaged. Price point was fair.

    Damian

    6/14/2022

    So far a year after install, the brakes are working flawlessly!



    by:

    Original parts were wrong. Talked with Tara and she fixed the problem. Thank you for taking care of the issue.



    by:

    Nicole was a great help. I received the correct parts.



    by:

    Everything showed up in two days



    by:

    Fit the 4 bolt flange great



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    14
    14

    See what our Experts say about this Dexter Trailer Brakes

    • Installing Electric Brakes - What Does The Initial Adjustment Consist Of?
      I can definitely help with that. You will need to do an initial adjustment when installing the Electric Trailer Brake Assemblies # 23-434-435. Once you have the brakes and hubs installed, you will turn the adjustment screw located inside the back of the brake assembly. This will expand the brake shoes and create more drag. The idea is that you want to still be able to turn the hub by hand, but it will not spin freely. So there should be a bit of resistance, but not too much or your brakes...
      view full answer...
    • Do self Adjusting Brakes Require In Initial Adjustment?
      Thank you for clarifying. Sorry if I missed that part on your initial question. With Self adjusting brakes it will work a bit differently. You will not need to mess with an adjustment screw. You will install the brakes and hubs like normal. Self adjusting brakes will adjust themselves upon initial install. At first they will feel pretty weak but with every brake application (while moving) they will get tighter and tighter until they are properly tensioned. What I would do is find a parking...
      view full answer...
    • Replacement Electric Brakes For Dexter 10,000LB Axle With 12-1/4" X 3-3/8" Brake Assemblies
      Dexter was able to tell me that your 10,000LB axle came with their 12-1/4"x3-3/8" Electric Trailer Brake Kit # 23-434-435. Due to the age of the axle I recommend replacing the entire assembly to ensure their are no issues with the old magnets or wiring.
      view full answer...
    • 8k Rated etrailer Hub/Drums that Work as Replacement for Dexter 8-285 Hub
      Yes the etrailer hub/drum # AKHD-865-8-K that you referenced would work great as a replacement for the Dexter 8-285 hub part # 8-285-10UC3-A that you also mentioned. Then for a set of brake assemblies we have the self adjusting Dexter kit part # 23-434-435 which would work great or the etrailer equivalent part # AKEBRK-8.
      view full answer...
    • Converting Hydraulic Brakes To Electric On Tri-Axle Livestock Trailer
      Most hubs are compatible with electric and hydraulic brakes. The 10,000 lb axle 12-1/4 inch diameter Dexter hub and drum assembly part # 8-430-5UC3 that we carry is hydraulic and electric brake compatible which may be what you have. If you can tell me the part number of the Dexter hubs and drums you have specifically I can find out if they are compatible. If your hubs are compatible, I recommend Dexter Electric Brake Kit part # 23-434-435. These Dexter brakes measure 12-1/4" diameter...
      view full answer...
    • Are Trailer Brakes Interchangeable Between 7k and 8k Axles
      There is a size difference between the brake assemblies that fit 7k axles and 8k axles so you would not be able to use 7k assemblies on an 8k axle. You'll have to measure your current assemblies do determine which kit you'd need: # K23-532-533-00 for 12 inch by 3-3/8 inch # DX32QR for 12 1/4 inch by 2-1/2 inch # 23-434-435 for 12-1/4 inch by 3-3/8 inch
      view full answer...
    • Is There Difference Between etrailer and Dexter 8k Trailer Brake Assembly Sets
      The value 8k etrailer brake assembly set part # AKEBRK-8 and the premium Dexter 8k set part # 23-434-435 both offer the same stopping power. The Dexter brand is widely considered to be the best brand for trailer braking components and they do work really well but the etrailer brand is not low quality by any means and with the price difference as large as it is I would say it's the easy winner.
      view full answer...
    • What Brake Assemblies Fit on the Dexter D80 Trailer Axle?
      The Dexter Electric Trailer Brake Kit # 23-434-435 are the assemblies most often found on Dexter D80 axles which utilize electric brakes. If your axle is set up with hydraulic drum brakes they most likely have the Dexter Hydraulic Drum Brake Kit # 23-402-403. If you can locate the axle serial number I can reach out to Dexter to find out exactly what parts were installed from Dexter to verify the correct replacements and what upgrades are available. The serial number will be on the axle...
      view full answer...
    • Do Electric Brakes Need Certain Amount of Stopping Power?
      That isn't the sort of figure that is factored into brakes. What you need to choose the right brakes is your axle's capacity, which is going to lead you in the right direction in terms of the brakes you need. For example, a 3,500 lb axle capacity would need electric brakes # AKEBRK-35-SA whereas an 8,000 lb axle would use # 23-434-435.
      view full answer...
    • 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...
    • Testing Trailer Magnets On A Trailer With 12" Electric Drum Brakes
      I have linked an article below on testing brake magnets for you to reference. You will need a Multimeter # PT89ZR to test the magnets in the Dexter Electric Trailer Brake Kit # 23-434-435. First you will begin by testing the output coming from the vehicle. Each magnet should see 3.2-4.0 amps of power between 12-13 volts with the brake controller set to max. This test can also be performed with a 12v battery to determine if the problem is with the brake controller or wiring and not the...
      view full answer...
    • 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...
      view full answer...
    • Correct Replacement Bearings and Braking Assemblies for 2021 Grand Design Momentum Toy Hauler
      It looks like a 2021 Grand Design Momentum 5th Wheel Toy Hauler could have come with either 7,000 lb or 8,000 lb axles. I have attached the correct bearing kits and braking assemblies for each of these options below. 7,000 Lb Axle: Dexter Electric Trailer Brake Kit part # 23-464-465 Axle Bearing Kit part # BK3-210 (2.125" Seal) Axle Bearing Kit part # BK3-200 (2.250" Seal) 8,000 Lb Axle: Dexter Electric Trailer Brake Kit part # 23-434-435 Inner Bearing part # 25580 Outer Bearing part...
      view full answer...
    • Recommended Electric Brake Assemblies for Lippert 8,000 Axle
      The Dexter Electric Trailer Brake Kit # 23-434-435 referenced in your question is designed for 8,000 pound axles. As long as your existing hub drums feature a 12-1/4 inch diameter and 3-3/8 inch depth, these electric brake assemblies will work great on your Lippert axle. You will also just want to make sure that the 4 bolt mounting pattern on these assemblies matches the pattern on your existing mounting flange. Both the left hand and right hand assemblies are included. I have attached...
      view full answer...
    • Comparing Dexter Hub and Drum Assemblies 8-285-11 and 8-393-4UC3
      You will experience some reduced braking power when using the Dexter Trailer Hub and Drum Assembly # 8-393-4UC3 with 12-1/4 x 2-1/2" brake assemblies compared to the # 8-285-11 with 12-1/4" x 3-3/8" brake assemblies. Between the two I recommend going with the # 8-285-11 along with bearings # 25580 and # 02475, grease seals # RG06-070, lug nuts # 6-53, and grease caps # rg04-120. For brakes I recommend the self adjusting braking assemblies # 23-434-435. Since you mentioned your axle does...
      view full answer...
    • Electric Trailer Brake Kit for 8K Drum Brakes
      There are a pair of brake kits which are rated for 8,000 lbs which may work for you. The Electric Trailer Brake Kit w/ Dust Shields # AKEBRK-8 and Dexter Electric Trailer Brake Kit # 23-434-435 have a 4 bolt mounting flange bolt pattern, are 12-1/4" diameter x 3-3/8" wide, and are self-adjusting. These will only require the use of an electric brake controller; I've added a link to our page with each of our controllers for you. I've also added a link to a video review of the Dexter brakes...
      view full answer...
    • Looking For Drum Brakes That Fit An 8,000 Pound Axle
      To get the correct replacement brake drums for your 8,000 pound axles, you will need a few things to be verified. The first will be if they are are hydraulic or electric brakes. If they are hydraulic, we currently have the Dexter Hydraulic Drum Brake Kit - Duo Servo - 12-1/4" - Left and Right Hand Assemblies - 8K # 23-402-403 that will measure 12-1/4 x 3-3/8 inches. This will also use a 4 bolt pattern to attach to your axle. If you have electric brakes though, you will need a few more...
      view full answer...
    • Electric Trailer Brakes For 12-1/4 Inch Dexter 8-285 Hub & Drum
      We do have the correct electric trailer brakes that will fit your Dexter 8-285 hub and drum, which is a 12-1/4 inch drum. You can choose from the following two options, both of which will work for you: - Electric Trailer Brake Kit with Dust Shields - Self-Adjusting # AKEBRK-8 - Dexter Electric Trailer Brake Kit - Self-Adjusting # 23-434-435 Along with these brakes, the only other thing you will need is their mounting hardware, the Mounting Bolts and Hardware for 12-1/4" Brake Assemblies...
      view full answer...
    • Replacement Brake Magnet and Spring for Dexter Electric Trailer Brake Kit (23-434/23-435)
      The only option we offer to replace the brake magnet spring on a Dexter Electric Trailer Brake Kit (23-434/23-435) part # 23-434-435 is with the Replacement Magnet part # BP01-306. We also offer the Replacement Brake Spring Kit part # K71-506-00 if you need any other springs.
      view full answer...
    • Replacement Electric Brake Assemblies For an 8,000LB Dexter Axle Manufactured In 1996
      Yes, the etrailer Electric Trailer Brake Kit # AKEBRK-8 will fit your 8,000LB Dexter Axle that was produced in 1996. I was able to confirm this with Dexter that the 12-1/4" x 3-3/8" was the only size electric brakes that were installed from the factory on axle. We also have the Dexter Electric Trailer Brake Kit # 23-434-435 if you wish to stay with original equipment.
      view full answer...
    • What Info Is Needed to Pick Out Brake Assembly Replacements for Trailer
      Based on the age of the trailer is it probably a long shot that current parts will fit as typically stuff that old is outdated. We would need to know the diameter of the hub's drum as well as the width and the axle capacity basically. I attached a help article that covers how to add brakes to a trailer that will be helpful as well.
      view full answer...
    • Will etrailer.com 12-1/4 inch by 3-3/8 inch Brake Assemblies Replace Dexter Brand
      For your Dexter drums that take assemblies that are 12-1/4 inch by 3-3/8 inch our etrailer.com brand asssembly set part # AKEBRK-10 is a confirmed fit and will save you money over the Dexter kit # 23-450-451. These are both kits for 10k axles. If instead you have 8k you'd need # AKEBRK-8 for etrailer.com brand and # 23-434-435 for Dexter.
      view full answer...
    • How to Determine Correct Bearings, Seals, and Electric Brakes for Hub and Drum
      I was unable to find a reference to that axle, but there is a simple way to find out the exact replacement bearings and seals you need. Simply take apart your hub assembly and look at the bearings themselves; wipe away the grease and you should be able to see the part number stamped directly on them. If you are unable to find them, you need to use digital caliper and measure your spindle to the thousandths of an inch where the bearings ride, as well as where the grease seal rides. You...
      view full answer...
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    • Dust Shield Cover for Dexter Electric Trailer Brake Kit 23-434-435
      The dust shield cover for the Dexter Electric Trailer Brake Kit # 23-434-435 is part # D036-115-20.
      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:
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    Employee Alexander C
    Written by:
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