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  1. Trailer Brakes
  2. etrailer
  3. Electric Drum Brakes
  4. 8000 lbs Axle
  5. 12-1/4 x 3-3/8 Inch Drum
  6. 15 Inch Wheel
  7. 16 Inch Wheel
  8. 16-1/2 Inch Wheel
  9. 17 Inch Wheel
  10. 17-1/2 Inch Wheel
etrailer Electric Trailer Brakes w/ Dust Shields - Self-Adjusting - 12-1/4" - Left/Right - 8K
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etrailer Electric Trailer Brakes w/ Dust Shields - Self-Adjusting - 12-1/4" - Left/Right - 8K

Part Number: AKEBRK-8
In Stock
$257.48
Trailer Brakes
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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
The automotive-grade pads on these automatically adjusting brakes offer lasting effectiveness. 12-1/4" x 3-3/8" Assemblies have rust-resistant, e-coated backing plates and dust shields to protect from debris. Fits 15" or larger wheels. Great Prices for the best trailer brakes from etrailer. etrailer Electric Trailer Brakes w/ Dust Shields - Self-Adjusting - 12-1/4" - Left/Right - 8K part number AKEBRK-8 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (375)
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etrailer by AxleTek Trailer Brakes - AKEBRK-8

Highlights

  • Always Stays in Tune: Self-adjusting design keeps shoes aligned for peak braking power—no routine manual tweaks.
  • Bolts Right On: Left and right 12-1/4" x 3-3/8" assemblies fit 4-bolt flanges for a quick, direct mount.
  • Stops Smooth and Strong: Automotive-grade bonded pads deliver consistent torque and quiet, even braking.
  • Built to Resist Rust: E-coated backing plates and dust shields protect internal parts from dirt and corrosion.
  • Simplifies the Setup: Runs only on an electric brake controller—no hydraulic lines or actuators to manage.
  • Rated for Heavy Loads: Works with 8,000-lb axles and wheels 15" or larger for dependable stopping control.

Features to know about

Upgrade Old or Weak Brakes: 12-1/4" Self-Adjusting Assemblies for 8,000-lb Axles

If your trailer brakes are dragging or just not grabbing like they used to, this etrailer kit is a solid replacement. The left and right 12-1/4" x 3-3/8" electric drum assemblies fit standard 8,000-lb axles with a 4-bolt mounting flange and work with wheels 15" or larger. They deliver the braking torque you need without the mess of hydraulic lines — just wire them to your brake controller and go.

Consistent Braking Power Without Constant Adjustment: Self-Adjusting Design

Manual brake adjustments can be tedious and easy to forget. These self-adjusting brakes automatically maintain the correct shoe-to-drum clearance as the pads wear, keeping braking smooth and consistent every time you tow. The built-in tension cable keeps everything aligned, so there’s no need to crawl under the trailer to dial them in.

Built Tough for Heavy Use: Automotive-Grade Bonded Pads and Rust-Resistant Backing Plates

These assemblies use automotive-grade friction material that’s fully bonded to the brake shoes — not riveted — for stronger, quieter braking and a longer service life. The tapered pad edges help prevent stutter and lockup, while the e-coated backing plates and protective dust shields keep dirt, grime, and moisture out. It’s a setup made for real road conditions, not just test stands.

Close-up of etrailer 12-1/4-inch electric trailer brake assembly showing tapered bonded brake pads and e-coated backing plate for rust resistance.

Ready for Real-World Loads: Certified Quality and Reliable Compatibility

Each assembly meets QAI, CSA, and SAE-N certification standards for braking performance and safety. They’re built to fit most standard hub-and-drum setups from etrailer, Dexter, and Lippert (LCI), giving you dependable compatibility with proven components. When matched with an 8K axle and proper hub, these brakes deliver confident stopping power trip after trip.

Specs

Application

  • Application: most standard hub-and-drum assemblies, including etrailer, Dexter, and Lippert (LCI)

Close-up image of an etrailer self-adjusting electric trailer brake assembly with red callout highlighting the tension cable and pulley mechanism that maintains brake shoe alignment.

  • tensioning cable — 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.

Dimensions

  • Dimensions: 12-1/4" diameter x 3-3/8" wide
  • Mounting flange bolt pattern: 4 bolt
  • Wheel size: 15" or larger

Weight and Capacity

  • Axle rating: 8,000 lbs

Warranty

  • Limited warranty: 1-year

B1208E-11 etrailer by AxleTek Electric Brake Assembly - LH - Driver Side - 12-1/4" x 3-3/8" - Self-Adjusting - 8,000 lbs - Dust Shield

B1208E-12 etrailer by AxleTek Electric Brake Assembly - RH - Passenger Side - 12-1/4" x 3-3/8" - Self-Adjusting - 8,000 lbs - Dust Shield





Customer Satisfaction Score:

Ratings & Reviews

4.6

375 reviews
Review sort icon
The automotive-grade pads on these automatically adjusting brakes offer lasting effectiveness. 12-1/4" x 3-3/8" Assemblies have rust-resistant, e-coated backing plates and dust shields to protect from debris. Fits 15" or larger wheels.

by:

The complete brake plates fit and worked perfect.I will be replacing the other two on my trailer this winter.



by:

Parts showed up on time and in good condition. Parts fit as advertised. Really happy with my purchase and shipping.



by:

Product delivered as ordered. The price was the best/lowest I could find. Have just installed four trailer brake assembly’ and it went well. Very happy!!



by:

Product fit and worked as it should would order them again for several other trailers that I own, just wish shipping would have been more timely.



by:

Parts where exact fit for dexter 8k axles,great value and appears to be well a manufactured assembly. Order fulfillment customer service was excellent!Items was shipped proto and well packaged. This was first time doing business with etrailer, definitely will be back!



by:

First time ordering from etrailer and I will definitely be ordering from them again. My experience with the sales person was pleasant and informative. My parts arrived on time and fit perfectly.



by:

Excellent service. I ordered on the 29th (evening) and all items were here afternoon of the 31st! The customer service rep. helped me find the exact replacement parts that worked for my application. The pricing was a lot better than I could find on the internet or locally. I will definitely order from etrailer again.



by:

the early arrival of the brakes was a surprise.Thats a +, the - was the packaging was a dissapointment. to put 2 brake kits in a 3' long box with several crumpled pieces of paper that allows the brakes to crash into each other during shipping can cause damage to the parts. either strap them in or use foam to secure them. over all I am satisified with the product. I am replacing the brakes on my 38rl redwood camper.



by:

Brakes work as they should on my 2004 Elite horse trailer. Easy to install. The break in period is important as when I first installed braking was not good, but after break in period they work excellent.



by:

I had bought from etrailer before and was satisfied so since I was in the market for brakes for one of my older trailers I called them. The employee assisted me in the selection of the parts I needed. The order was placed and I was given a delivery date. Surprise, the order was delivered a few days ahead of that. I am pleased.



by:

Exactly what I ordered. Looks like a good product, haven't used the RV yet to try them out. Fitting was straightforward. My only disappointment was not getting a break on delivery cost to Canada but......
Good overall service from Ashley, would order again from etrailer if I needed anything



by:

The parts fit like the originals. Save lots of time in ordering the parts from etrailer.

Tim profile picture

Tim

12/3/2020

The brakes work like new. no problems.



by:

Way cheaper than original Dexter and came w/ a shield. It's looks exactly the same and performs like Dexter, but you save a lot money. My friend saw these on my trailer and couldn't believe how much I paid. So, he had me order 4 set of them for him. I just torch off old mounting bolts and the brake assembly fit perfectly. My trailer is used mon-fri for work. Now, I have working trailer brakes.



by:

GREAT PRICE AND AWESOME STOPPING POWER! USED THESE UNITS TO CONVERT FROM OLD HYD BRAKES TO ELECTRIC, I PULL OVERSIZE WITH A 28,000 GVW GOOSNECK AND THESE BRAKES SLOW IT DOWN NICE!



by:

Excellent service and attention



by:

Easy install as they were an exact replacement. Glad to have found self adjusting brakes as it was difficult crawling under my 5th wheel, raising a wheel off the ground and performing the adjustment procedure. It took several hundred miles for these to burnish in completely. Once they did, my brake controller setting was reduced from 100% to 40%. Our 7 week road trip took us through Grand Tetons, Yellowstone, mountains of Idaho, Washington and Oregon. The brakes were great the entire trip.



by:

Have not taken trailer on long trip yet but, testing and adjusting went well



by:

Not fitting my 12" drums! I need to order new drums or return brakes for ones that fit 12" drums!

Kate F. profile picture
Etrailer Expert

Kate F.

6/5/2026

Sorry to hear that Merle. Can you please confirm your axle capacity, and is there any numbers stamped on your existing hub so I can see what you currently have? How old is the trailer you are working on? These are 12 1/4", so that explains why they are not fitting your 12" drum, I would like to find you the right parts, just need some more info =)



by:

The reason I gave the 5 star is because of the timely delivery, low cost, and free delivery. The quality is the same that I could buy locally, however the savings is so significant that I had to buy them. I'm a mobile independent mechanic and I try to give my customers the best products and deals I can. I'll be buying more from etrailer.com. Thank you.



by:

Exact replacement



by:

Fit as it should. Would order again



by:

Need a refund, sent the wrong parts.

Mike L. profile picture
Etrailer Expert

Mike L.

4/2/2026

I'll get that taken care of for you, Shane.



by:

I am usually not one to buy aftermarket parts, I always prefer “Made in USA”. However these brake assemblies were better then expected and fit perfectly. I’m yet to see the wear factor but they look good.



by:

Individual who assisted me with my order was very knowledgeable. She took good care of my order and needs. If Iam right she help me with my return ordered. Job well done. Thanks!



by:

Very pleased, quick delivery and the parts look very high quality


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See what our Experts say about this etrailer Trailer Brakes

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    I looked in several places online and couldn't get a definite axle capacity for your trailer. I'd assume it's a pretty high capacity since it's a tandem axle trailer that weighs 12k and has 3k of capacity. So most likely you have 8k axles like what the part # 8-285-11 hub fits which has bearing numbers # 25580 and # 02475 with grease seal # RG06-070. Then for brake assemblies part # AKEBRK-8. Get me the diameter of your axles though and I'll be able to get you a better recommendation. Typical...
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    Hey Erich, thanks for reaching out. Your axle has drum brake, correct? If so, the 8K axles typically use a 12-1/4" x 3-3/8" brake assembly like part # AKEBRK-8. That's a pretty standard size for 8K axles but I do recommend pulling off a hub and verifying that before you order. The brake shoes should be 12-1/4" in diameter and 3-3/8" wide. Or if you can see the casting number on the front of one of your drums, I may be able to use that to look up your axle/brake info and verify the size....
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  • Electric Brakes for Rockwell 8,000 lb Torsion Axles
    Electric brakes such as Electric Trailer Brake Kit # AKEBRK-8 do not fit specific axles. These are 8,000 lb rated brakes with a 4-bolt mounting flange pattern and are 12-1/4" diameter x 3-3/8" wide, so you would need that mounting bolt pattern and a hub and drum assembly that allows these brakes to fit. I've added a link to a video review of the brakes for you to take a look at.
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  • Recommended 8,000 lbs Brake Assemblies for a Dexter 8,000 lbs Hub
    Welcome back Scott! I couldn't find a hub with the 277210 part number you gave me on our site, Dexter's, or online but we do carry a few brake assemblies that fit Dexter 8,000 lbs 8-lug hubs. I have listed them below: etrailer Electric Trailer Brakes w/ Dust Shields - Self-Adjusting - 12-1/4" - Left/Right - 8K item # AKEBRK-8 Dexter Nev-R-Adjust Electric Trailer Brakes - 12-1/4" - Left/Right Hand Assemblies - 8K item # 23-434-435 Dexter Hydraulic Trailer Brakes - Duo Servo - 12-1/4"...
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  • Will Standard 3.5K Brake Assemblies Fit A Backing Plate Bolt Spacing Of 2-3/4" And 2-7/8"?
    Hello Jason, thanks for reaching out. All of the 3.5K electric brake assemblies we offer use the standard bolt spacing which is 2-7/8" apart on center. The dimensions of the brake mounting flange from bolt hole to bolt hole is an industry standard, however some companies such as "Demco" refer to this measurement as a 2-3/4 instead of the more common 2-7/8". The actual dimension is really more like 2-13/16", but different brake manufacturers will round to either 2-3/4" or 2-7/8". Either...
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  • Replacement Trailer Brakes For a Lippert 8,000lb Brake Drum
    As we do not carry replacement shoes for Lippert brake assemblies you would need the etrailer Electric Trailer Brakes # AKEBRK-8 for each axle. Based on the stampings on your hub I see it is for an 8K Lippert axle which uses the 12-1/4"x3-3/8" brake assemblies.
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  • 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...
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  • What is the Four Bolt Brake Mounting Flange for 8,000 Lb Axles
    The four bolt brake mounting flange for 8,000 lb trailer axles is going to be more or less an industry standard. This industry standard is 3-5/8" across left to right on center and 3-7/16" top to bottom on center. This could very well vary 1/16" depending on where you measure but rest assure if you have an 8,000 lb trailer axle with four bolt brake mounting flange the Electric Trailer Brake with Dust Shield part # AKEBRK-8L should be the correct braking assembly for you.
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    All of the 8K electric brake kits have a square 4-bolt pattern like the etrailer Electric Trailer Brake Kit w/ Dust Shields # AKEBRK-8 you referenced. We do have the Kodiak Disc Brakes # KOD64VR you looked at earlier with the correct mounting bolt pattern for your older AL-KO/Quality axle(s) but this is a hydraulic setup so we'll have to get you brake lines and an actuator for your trailer. If you can give me some more insight into your current trailer brake setup and weight rating (GVWR)...
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    I saw the Q&A you were referring to, which is about a decade old as of this writing and there are no 12" diameter x 3-3/8" wide brake assemblies we offer, just the 12-1/4" diameter x 3-3/8" wide # AKEBRK-8 that are rated for 8,000 lb axles. You may need to change your hub and drum to get one compatible with the larger brakes that are now available. To do this you will need to know what bearings your current hub has. You will need to take apart your current hub assembly and look at the...
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  • 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.
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  • Can 12-1/4 Inch x 3-3/8 Inch Electric Brakes Be Added To a Lippert 7,000 Lb Trailer Axle
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    Since you mentioned that you have 8k hybrid axles and 7k spindles, I recommend confirming your inner/outer bearings to ensure you are getting the correct hubs/drums and brakes with the correct weight capacity. With that being said, if you have 8k axles with 5/8-inch studs, I recommend the Trailer Hub and Drum Assembly - 8,000-lb Axles - 8 on 6-1/2 - Oil Bath # 8-285-10UC3-A (with # 02475 outer bearing and # 25580 inner bearing). If you have 7k axles, I recommend the Dexter Trailer Hub...
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  • Replacement Brakes for Gatormade Gooseneck Trailer with 8K Lippert Axle
    I spoke with Lippert and was able to confirm you need the Electric Trailer Brake Kit part # AKEBRK-8.
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  • Adjusting a Self-Adjusting Brake Assembly on 8K Axle to Easily Remove Drum
    The Self-adjusting Brake Assemblies like # AKEBRK-8 still have a manual adjuster to allow you to relieve that brake shoe pressure. You simply remove the plug on the back of the assembly and adjust the manual dial using a small screwdriver or brake adjuster spoon like # W80630. I've attached a video to assist.
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  • Replacement 12-1/4 Inch x 3-3/8 Inch Braking Assembly with Four Bolt Brake Mounting Flange
    If the braking assemblies you have now are indeed 12-1/4" x 3-3/8" and use a four bolt brake mounting flange then you are going to want to use the Electric Trailer Brake Kit w/ Dust Shields part # AKEBRK-8, not the Electric Trailer Brake Kit w/ Dust Shields part # AKEBRK-10. I have attached a photo which shows the correct way to measure your braking assembles for replacement. You will also need to verify that the bolt holes on your brake mounting flange are 3-7/16" apart on center from...
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  • Upgrading From 7K to 8K Electric Brake Assemblies on Trailer for Increased Braking Power
    You should be able to change out the backing plates, hubs, and brakes on your trailer so you can upgrade to higher rated assemblies, but I do recommend checking a couple things on your tow vehicle first. It's possible that your weak braking is due to a wiring or brake controller issue on the vehicle. If this is the case, changing out the brake assemblies on the trailer won't resolve the issue. I first recommend testing the vehicle side 7-Way with a Multimeter like # PT89ZR. Make sure...
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  • Torque Spec to Use for 8k Dexter Trailer Axles
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    For your 8K Dexter axle we have 12 x 3-3/8-inch self-adjusting electric drum brake kit # K23-532-533-00. These brakes use a 4-bolt mounting pattern and they fit trailer wheels from 16-inches up to 17-1/2-inches. These Dexter brakes are USA-made and they include mounting hardware. You will need two kits. If you're looking for a lower-priced option we also have kit # AKEBRK-8 from AxleTek. These do not include hardware so you can use part # BRKH122508 for a matching hardware kit. Pricing...
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  • Choosing the Correct Replacement Electric Brakes for 8,000 lb Axle
    Knowing your axle's weight capacity - in your case 8,000 lbs - is the first step towards finding the correct replacement brakes. The brakes you referenced, which are sold together as the Electric Trailer Brake Kit # AKEBRK-8, also have a 4 bolt mounting flange pattern, which you'll also need to have in order for these brakes to work as replacements, as well as wheels that are 15" or larger. I've added links to review videos of the individual brakes for you to take a look at.
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  • Converting Drum Brakes On A Dexter Military Trailer Axle With 8 On 6-1/2
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    The Taskmaster Provider 215/75R17.5 Radial Tire w/ 17-1/2" Solid Center Wheel - Offset - 8 on 6-1/2 - LR H # TA69VR is designed to be used with and requires the use of flange nuts instead of the standard conical style lug nuts. Typically an 8,000 pound axle will use 5/8"-18 studs as the 1/2"-20 stud will usually denote a hub/drum that will be used on up to a 7,000 pound axle. With that being said, I recommend upgrading your hub/drum to go with this tire and wheel set-up. If you have brakes...
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  • 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.
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  • AxleTek Brake Assembly Recommendation for 8k Axles with 4 Bolt Mounting Pattern
    Actually our etrailer.com brand brake assemblies are rebranded AxleTek assemblies. So we have the 8k left and right assembly set # AKEBRK-8 which is most likely what you need but these are 12-1/4 inch in diameter by 3-3/8 inches wide and attach with a 4 bolt pattern.
    view full answer...


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
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Employee Adam R
Expert Research:
Adam R
Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Cole B
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Employee Wilson B
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Employee Alexander C
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