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Free-backing, driver's-side and passenger's-side brakes won't engage when you reverse, even if your actuator is activated. Galvanized steel resists rust, making the assemblies great for boat trailers. Fit 14" to 15" wheels.
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Note: Because free-backing brakes are designed to eliminate nearly all friction between the brake shoes and the drum when you are driving in reverse, a trailer breakaway kit will not be effective should your trailer disconnect from your tow vehicle while you are backing up.
Free-backing brakes let your trailer move in reverse without the brakes being activated by your surge actuator. These brakes are needed if your actuator does not have a reverse lockout, which is a mechanism that ensures that the actuator does not activate when your rig moves in reverse.
Each of these Demco free-backing brake assemblies has a fall-away shoe that is designed to provide full braking action when your trailer is moving forward and to supply only limited friction when the trailer is moving in reverse. This is largely due to the incorporated dual springs at the shoe's pivot point. (One spring sits on either side of the shoe lever, so only a single spring is visible when looking at the brake assembly.)
When your rig is moving forward and you engage the trailer brakes, each fall-away shoe expands normally, with the leading edge of the shoe catching the drum. This occurs because the plunger on the hydraulic cylinder pushes on the shoe lever, forcing the leading edge of the brake shoe into the drum. Once that edge catches, the dual springs at the shoe's pivot point facilitate braking by forcing the rest of the shoe to pivot into the drum. The action of the shoe against the drum provides the friction required for braking.
When you are driving in reverse, however, the hydraulic cylinder and the springs work against one another. Even though the plunger pushes on the shoe lever, the dual springs of the fall-away shoe overcome the pressure from the brake cylinder, keeping the leading edge from catching on the drum and ensuring that the shoe does not fully pivot into the drum. Because the shoe makes only slight contact with the drum, just enough friction is generated so that only a minimal amount of braking occurs when you are in reverse.
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Average Customer Rating: 4.9 out of 5 stars (66 Customer Reviews)
Free-backing, driver's-side and passenger's-side brakes won't engage when you reverse, even if your actuator is activated. Galvanized steel resists rust, making the assemblies great for boat trailers. Fit 14" to 15" wheels.Haven't used them yet because I have to install a new actuator... however these were an exact fit and easy replacement on my 1981 Somerset boat trailer.
Robert C - 06/02/2021I bought these right and left hydraulic brake assemblies for my boat trailer at a great price. I received my order one day earlier than promised. Etrailer.com really rocks to satisfy it’s customers. They provided an awesome tracking link for me to review my order’s shipping progress. This is the best tracking link that have ever experienced. Both complete brake assemblies fitted perfectly in place of my old assemblies. On each Brake assembly, I just had to remove the 4 mounting bolts from the axle flange and the hydraulic hose. Then install the new complete brake assembly, tighten the 4 mounting bolts and makeup the hydraulic hose.. This made this brake job a breeze! It was a pleasure doing business with you. Thanks Etrailer.com!
Larkin - 02/11/20212000 ez loader trailer complete brake job. 2 axle torsion suspension. All 4 axles . I ordered 4 complete brake /backing plate assemblies and 4 new hubs. My complete order showed up on time afew days later. After I got the trailer and boat jacked up and started to take things apart I overlooked not ordering the transitional flexible brake lines that go from the hard lines into the back of the brake assembly. After traveling for 30 minutes to a hydraulic brake line shop to have lines made up they told me they did not have the fittings I really needed these lines to get this job done for the weekend to get the boat out on the water. So I called etrailer and was connected to Tiffany who I must say provided the best customer service I've ever experienced she worked with me on getting the correct items and set up next day rush shipping. She even personally made sure that my order got out the door and called me personally to let me know . There aren't too many companies that goes to that length to serve their customers. The next day at 10 a.m. the were delivered to my front door. (From half way across the United States ) . I was trilled to say the least. Thank you etrailer and a special thank you to Tiffany. In customer service for your personal attention and follow up regarding my order.
Steven - 09/29/2019Fast deliver and an exact fit on my Tracker Boat trailer
24 yr old boat trailer brake cylinder finally fails. Brake shoes very thin. Every thing rusty and dirty. I look at cylinders only, pads only, then found these! Everything new at reasonable price and delivered on time. First trip found them to be smooth in operation. did not jam on at the last minute like the old ones did. THANKS etrailer.
Hey George just got done installing your brake system on my Carkins dual axle boat trailer, what are nice product they went on beautiful no issues whatsoever extremely satisfied following is a picture of before and after , I just bought the boat and trailer and could not believe the condition of the brakes
I received this in a timely fashion. I am very pleased with this product. When I apply my truck brakes, I cannot feel my trailer trying to push me. It’s as if I am not towing my tandem trailer at all.
I had to place 2 orders from eTrailer this week. Fair prices on all products ordered - and lightning fast order processing and shipping. Strongly recommend! Will have my boat trailer back on the road in no time.
Excellent product, very fast delivery...faster than estimated. A perfect no hassle fit the first time right out of the box. Very high quality parts that are much better than the original parts. I have done a lot of trailer brakes and these parts were a joy to install, I cannot say enough good things about these parts with out repeating myself
Great service,got exactly what I ordered,I have several trailers and will never buy from anywhere else!
Very pleased with these folks, shipping was very quick and the parts are top notch.
Perfect fit. Excellent quality with the lowest prices around. Received complete order in under 5 days. I found that customer service was extremely knowledgeable of the parts i needed and offered up the 3 options, good, better and best for my boat trailer brake assemblies. I will return to etrailer for all my boat trailer needs.
Great replacement. Took off the old crud and cleaned up the mount. The new assembly bolted right on.
Very impressed with the speed of shipping. Wow! Very happy with the parts.
Shipping time was quick ,direct bolt on, seem to function well. Over all good quality. Used with the Demco Hydraulic Brake Actuator, to complete the restoration of the braking system.
It was easy to select the trailer brake kit. The dimensions were right there so I could measure what I needed and order. Glad I read the reviews that said to purchase replacement hardware too. Quick delivery And I am all set
Why buy all of the bits and pieces, along with the special tools to assemble it all yourself to a rusted backplate? The whole assembly comes ready to bolt on out of the box, making a difficult brake job quite sim, for barely more money than buying all the parts separately. Excellent quality and fit. Highly recommend!
Brakes work well and are a good value. I also bought an actuator and new lines to replace an existing, old trailer brake system. The detailed descriptions of these products is great and helped verify that they would fit my trailer. The gravity bleeding system that the etrailer video shows did not work for me. I repeatedly pulled on the emergency breakaway handle on the actuator to fill and bleed the system.
work great, just what i needed
Nice set of replacement hydraulic brake drums I bought as spares.
I ordered a set of complete galvanized trailer brake backing plates/linings/master cylinder, and a new surge coupler, and couldn't be happier with the quality, price, and very quick free shipping. Very easy on line ordering experience......
I bought a set of trailer brakes from etrailer.com, they were easy to install and function really good on my trailer. I talked with Robert over the phone at etrailer and he was extremely knowledgeable about this product and he helped me buy the correct brakes for my trailer. I receive my brakes three days after I ordered them, extremely fast service. I will use etrailer.com again to by parts for my trailer.
Perfect fit, I had them installed in 20 minutes. Super fast delivery.
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