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  1. Trailer Brakes
  2. Demco
  3. Hydraulic Drum Brakes
  4. 7000 lbs Axle
  5. 12 x 2 Inch Drum
  6. 14-1/2 Inch Wheel
  7. 15 Inch Wheel
  8. 16 Inch Wheel
Demco Hydraulic Trailer Brakes - Uni-Servo - Galvanized - 12" - Left/Right Hand Assemblies - 7K
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Demco

Demco Hydraulic Trailer Brakes - Uni-Servo - Galvanized - 12" - Left/Right Hand Assemblies - 7K

Part Number: 23511-10
In Stock
$150.47
Trailer Brakes
23511-10 - 12 x 2 Inch Drum Demco Trailer Brakes
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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Hydraulic drum brakes offer more powerful, controlled, and smoother braking compared to electric brakes. 12" x 2" Marine-grade assemblies have a 5-bolt pattern. Fit 14" to 16" wheels. Made in the USA. Great Prices for the best trailer brakes from Demco. Demco Hydraulic Trailer Brakes - Uni-Servo - Galvanized - 12" - Left/Right Hand Assemblies - 7K part number 23511-10 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (55)
  • Q & A (0)
  • Photos

Demco Trailer Brakes - 23511-10

Highlights

  • Resists Rust and Corrosion: Galvanized plates, stainless springs, and zinc-plated cylinders hold up in wet or salty conditions.
  • Handles Heavy Stops: Semi-metallic riveted pads stand up to frequent braking without crumbling or warping.
  • Keeps Braking Smooth: Adjuster plugs block dirt so internal parts stay clean and performance stays consistent.
  • Easy Bolt-On Fit: Left and right assemblies mount to 5-bolt flanges with 12" x 2" drums for quick replacement.
  • Strong Hydraulic Control: Uni-servo design delivers smooth, powerful braking with predictable pedal feel.
  • Rated for 7,000-lb Axles: Works with 14-1/2", 15", or 16" wheels and most standard hub-and-drum setups.
Made in USA

Features to know about

Built for Wet and Salty Roads: Galvanized, Zinc-Plated, and Stainless Protection

Boat ramps and winter roads can chew through standard brake parts fast. These 12" x 2" marine-grade assemblies use galvanized backing plates, stainless steel springs, and a zinc-plated wheel cylinder to hold up against rust and corrosion. They’re made to keep working smoothly even after repeated dunkings or exposure to heavy road salt.

Confident Stopping Without Overheating: Semi-Metallic Pads and Riveted Shoes

When you’re towing heavy or making frequent stops, you want brakes that bite consistently without fading. The semi-metallic pads on these Demco hydraulic drum brakes are strong and long-lasting, producing less dust than organic pads. Each pad is riveted to the shoe for a secure hold that resists crumbling or warping over time, so braking stays predictable mile after mile.

Simple Manual Adjustments Keep Braking Sharp

As shoes wear down, stopping distances can creep up. These brakes include adjuster plugs that let you fine-tune the star gear easily while keeping dirt and grime out of the assembly. A quick manual adjustment brings the shoes back into spec so your trailer keeps braking evenly every time you hit the pedal.

Fits Standard 5-Bolt Flanges for Straightforward Setup

Each kit includes left-hand (driver’s-side) and right-hand (passenger’s-side) assemblies that fit most standard 12" x 2" hub-and-drum setups with a 5-bolt mounting flange. They work with 14-1/2", 15", or 16" wheels on axles rated up to 7,000 lbs, making them an easy bolt-on replacement when your old drums are worn or corroded.

Specs

Application

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

Dimensions

  • Dimensions: 12" diameter x 2" wide

Mounting

  • Mounting flange bolt pattern: 5 bolt

Wheel Compatibility

  • Wheel size: 14-1/2", 15", or 16"

Weight and Capacity

  • Axle rating: up to 7,000 lbs

Warranty

  • Warranty: 1-Year warranty

Close-up view of a Demco hydraulic trailer brake adjuster screw showing how to manually adjust drum brakes using a flathead screwdriver through the backing plate.

SB23511M Demco Galvanized 12" Marine Trailer Brake Assembly - Single Servo - Left Hand

SB23510M Demco Galvanized 12" Marine Trailer Brake Assembly - Single Servo - Right Hand





Ratings & Reviews

4.7

55 reviews
Review sort icon
Hydraulic drum brakes offer more powerful, controlled, and smoother braking compared to electric brakes. 12" x 2" Marine-grade assemblies have a 5-bolt pattern. Fit 14" to 16" wheels. Made in the USA.

by:

Installed on our boat trailer, fit was excellent and worked great last year. Have yet to tow the boat but will shortly and expect the same great operation, I wish they were self adjusting but plan on making any adjustments prior to vacation. Great service as always from etrailer.



by:

Everything looks okay. There was concerns when I opened the box. Everything was loosely packed and shifted all on one side of the box. I had to adjust one of the brake shoes due possible moving around the box during shipping shipping. Giving low rating due to how it was packed and could have cost more time from using my trailer if anything was damaged



by:

I needed brakes shoes, bearings, seals, piston and drums i.e. a complete rebuild on my boat trailer. I called etrailer to place the order. I was lucky enough to get Stacy to assist in getting everything I needed. Stacy was not only very knowledgeable but also enjoyable to work with. She was also patient with me as I had to put her on hold to get more information that I forgot to get before the call. She double checked all my needed items before placing the order.. She even took a minute for some small talk as we waited for the order to log. I've not had customer service like this in quite some time. After the order was placed, i realized that I made another measurement error and had to change the order.
I called Stacy back and she updated the order and made the correction on the amount I owed... I actually saved a few bucks.
Once again etrailer has customer service like no other online company I've done business with.
Great job Stacy...
Mike



by:

Easy to install, great product! First time working with this company and very happy with my experience, awesome customer service.



by:

Perfect replacement on my 3500lb axle boat trailer, 1996 Trailrite. Brakes bolted right up. Galvanized finish was complete, and well done. These assemblies appear as if they will last for many many years over the original factory brakes. Outstanding price point. Wanted to go to electric disk, however I'm very happy with these replacement brakes, and for the price and stopping power I'm very happy. I highly recommend. Shipping time was rapid, and FREE. With the help of a friend, replacing these brakes, actuator, and bleeding the system was about 3 hours work. Well worth it!



by:

I ordered the wrong set of brakes for my trailer and etrailer exchanged them without any issue. The second set fit my boat trailer perfectly and has worked great for the year.



by:

Very easy to deal with. Items in stock. Shipped the same day. Tracking info provided. Items arrived packed very well so no damage could take place in transit. Thank you erailer. You are our go to for trailer parts.



by:

Affordable option for my 1999 triple axle boat trailer rebuild. Out of country manufacturing quality is less than more expensive options.



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Working out very well....



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Fast shipping Great fit Easy to ins tall



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Demco did a pretty sloppy job on the galvanizing of the backing plates. Otherwise, all OK



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Very good service and fast delivery



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as always great service, thanks



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good quality



by:

Very easy to make the correct selections. Delivery updates make the whole process painless.



by:

You guys are great very helpful order came in very fast parts beautiful so far so good will definitely recommend you to all my friends awesome job



by:

I got the product I needed faster than I thought. Great place to get all your trailer parts!!



by:

Well they last about two to three years max in saltwater even with fresh water wash down. The pads last just fine and braking performance is great. Wish they hardware and other components were more corrosive resistant.



by:

I did have a question. I ordered the setup for 6-7k axel but I found out my boat setup is probably closer to 4K. The surge controller said it was a 6.6k surge controller and that’s why I went with the heavier brake set up.

Will this be an issue at all as long as they fit? Or do I need to send them back for the smaller weight class.

Mike L. profile picture
Etrailer Expert

Mike L.

11/26/2018

According to Demco, as long as youre not exceeding the capacity of the brake assemblies, youll be just fine. No worries until you use them on a trailer heavier than their rating.



by:

Fast helpful and great price and service thanks again.


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See what our Experts say about this Demco Trailer Brakes

  • Why Are New Hydraulic Brakes Getting Hot and Smoking
    It sounds like you installed the Demco Hydraulic Brake Kit # 23511-10 correctly but it is possible you may have adjusted them a bit too aggressively, as "slight drag" is subjective, of course. Otherwise there could be an issue with your drum assembly if it is on the older side. If the assembly is at all warped or slightly corroded that can be an issue. Another problem may be that the hub needs to be properly greased and the bearings packed with Bearing Grease # L11390 and a bearing packer...
    view full answer...
  • Timbren Axle-Less System That Uses Hubs With 8 on 6-1/2 Bolt Pattern
    Since you need hubs with an 8 on 6-1/2 bolt pattern, the Timbren Axle-Less Suspension System you would need to use is # TASR7KS01, which is rated for 7,000 lbs. The hubs that fit these Timbren's are the Dexter # 42866UC3-EZ, and the brakes to go with would be the Demco Galvanized # 23511-10, which are 12" x 2" and fit 14.5" to 6" wheels. I've added links to a couple video reviews on these parts for you to take a look at.
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Written by:
Alexander C

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