bing tracking image
  1. Trailer Brakes
  2. DeeMaxx
  3. Disc Brakes
  4. 3500 lbs Axle
  5. 14 Inch Wheel
  6. 15 Inch Wheel
  7. 16 Inch Wheel
  8. 16-1/2 Inch Wheel
  9. 17 Inch Wheel
  10. 17-1/2 Inch Wheel
DeeMaxx Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 10" Hub/Rotor - 5 on 4-1/2 - 3.5K
etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
DeeMaxx

DeeMaxx Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 10" Hub/Rotor - 5 on 4-1/2 - 3.5K

Part Number: DE84NR
In Stock
$2,559.96
Trailer Brakes
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Tandem-axle trailers put a lot of demand on your brakes, especially when you're towing heavy loads at highway speeds. This DeeMaxx kit replaces drum brakes with hydraulic disc brakes for more consistent stopping power during long tows. Great Prices for the best trailer brakes from DeeMaxx. DeeMaxx Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 10" Hub/Rotor - 5 on 4-1/2 - 3.5K part number DE84NR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (27)
  • Q & A (0)
  • Videos (1)
  • Photos

DeeMaxx Trailer Brakes - DE84NR

  • Disc Brakes
  • 3500 lbs Axle
  • 14 Inch Wheel
  • 15 Inch Wheel
  • 16 Inch Wheel
  • 16-1/2 Inch Wheel
  • 17 Inch Wheel
  • 17-1/2 Inch Wheel
  • Hub and Rotor
  • Marine Grade
  • DeeMaxx
  • 5 on 4-1/2 Inch
  • 1/2 Inch Studs

Tandem-axle trailers put a lot of demand on your brakes, especially when you're towing heavy loads at highway speeds. This DeeMaxx kit replaces drum brakes with hydraulic disc brakes for more consistent stopping power during long tows.


Highlights

  • Complete Disc Brake Upgrade Kit: Converts tandem 3.5K axles from drum to hydraulic disc.
  • Short, Smooth Stopping Power: Ceramic pads and vented rotors improve control at highway speeds.
  • Corrosion-Resistant Maxx Coating: Salt spray rating over 1,000 hours for marine and winter towing.
  • 1,600 PSI Electric Over Hydraulic Actuator: Fast pressure response for confident braking.
  • Flexible Tandem-Axle Brake Line Kit Included: Rubber DOT-approved hoses simplify installation.
  • 10" Hub/Rotor With 5 on 4-1/2" Bolt Pattern: Fits common 3,500 lb axle setups.

Features to know about

True Disc Brake Performance For Tandem Axles

DeeMaxx Disc Brake Assembly

Drum brakes can fade under heat and require regular adjustment. This kit replaces them with DeeMaxx 1-piece hub-and-rotor assemblies designed for 3,500 lb axles. The vented rotor and drainage holes help shed heat and moisture, while ceramic pads and a stainless steel piston provide smooth, consistent stopping power. The result is more controlled braking and shorter stopping distances, especially when towing at highway speeds.

Maxx Coating For Corrosion Resistance

DeeMaxx Disc Brake Coating and Drain Holes

Launching in fresh or brackish water, or towing through winter road salt, exposes your brakes to corrosion. The Maxx coating on the hub-rotor, caliper, and bracket is rated for over 1,000 hours in salt spray testing. Combined with built-in rotor drainage, this helps reduce rust and extend component life compared to standard plated assemblies.

Fast, Controlled Electric Over Hydraulic Braking

DeeMaxx Electric Over Hydraulic Actuator for Disc Brakes

The DeeMaxx Alpha G1600 actuator converts your in-cab brake controller signal into hydraulic pressure up to 1,600 psi. It reaches 1,000 psi in just 3/16 of a second for quick response. The extruded aluminum housing helps manage heat, and the sealed fluid reservoir reduces contamination risk. A 360-degree brake line fitting allows flexible mounting on the trailer frame or inside a compartment.

Flexible Brake Line Kit For Tandem Trailers

DeeMaxx Hydraulic Brake Line

The included 20-foot hydraulic brake line kit is designed for tandem-axle trailers with disc brakes. DOT- and SAE-compliant rubber hoses are easier to route than rigid steel lines and work well with torsion axles or foldaway tongues. Brass tee and cross fittings, loom clamps, and mounting hardware help you secure the system cleanly to your trailer frame.

Low Maintenance

DeeMaxx Disc Brake Assembly

Disc brakes eliminate many of the springs and internal components found in drum systems. The 1-piece hub-and-rotor design reduces the risk of uneven wear from trapped moisture, and laser-etched bleeding instructions on the caliper make future service straightforward. Fewer wearable parts means less adjustment and more time towing.

Specs:

Brake Assemblies:

  • Axle capacity: 3,500 lbs per axle
  • Rotor diameter: 10-3/16"
  • Bolt pattern: 5 on 4-1/2"
  • Piston diameter: 2-1/4"
  • Brake flange: 4 bolt
  • Wheel bolt diameter: 1/2"
  • Inner bearing: L68149
  • Outer bearing: L44649
  • Grease seal: GS-1719DL

Actuator:

  • Maximum output pressure: 1,600 psi
  • Power: 12V DC, minimum 30 amp circuit
  • Current draw: 18 - 24 amps at full pressure
  • Hydraulic port: 3/16" inverted flare
  • Fluid capacity: 15.7 oz, DOT 4
  • Dimensions: 10" long x 3-5/8" wide x 6" tall

Brake Line Kit:

  • Main line: 20' rubber brake hose
  • Includes tandem-axle branch lines and fittings
  • Hose inner diameter: 1/8"
  • Fitting size: 3/16"
    • Thread size: 3/8"-24
    • Thread length: 0.287"
  • Brass tee and cross fittings included

Warranty:

  • Brake assemblies: 7-Year
  • Actuator: 2-Year


EOHA1600 DeeMaxx Alpha G1600 Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi

DOT-TA20K DeeMaxx 20' Axle Brake Line Kit - Tandem Axle

1/DBI-3.5K-MAXX-KIT DeeMaxx Disc Kit w/ Bearings & Seal 3.5K - 1 Brake - Quantity 2

MK-TA-3.5K-MAXX





Video of DeeMaxx Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 10" Hub/Rotor - 5 on 4-1/2 - 3.5K
Video Thumbnail Video Player Dialog

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of DeeMaxx Trailer Brakes - Disc Brake Kit Tandem - DE84NR

Hi, everyone. Steve here with etrailer. Today we're taking a look at the DeeMaxx disc brake kit with included actuator for a tandem axle trailer. So folks, this is gonna be a complete disc brake upgrade kit. You can convert your tandem three and a half thousand pound axles from drum to disc hydraulic brakes. So obviously what I got here on the table is not enough to do that full kit.

I do wanna throw an image up on the screen of what you're gonna get. You're gonna get all four assemblies of those disc brake with the included rotors, the calipers, caliper brackets, and of course, the hydraulic actuator, with all your rubber brake lines and all your fittings included. So again, I just have one set here on the table as far as the rotor and hub and everything. And again, this features an inner 68149 bearing and an outer 44649 bearing. So the wheel bolts are half inch, and the lug pattern is a five on four and a half inch bolt pattern.

Make sure you're measuring your bolt pattern. There are a couple of options out there. You wanna make sure this matches up to what you are doing. And this rotor is gonna measure 10 and 3/16 inches overall in diameter. Now, another great thing about this kit is it's gonna be corrosion-resistant.

It has what's called their Maxx coating. It has a salt spray rating of over 1000 hours, making these perfect for marine and winter towing. The actuator, it features a 1600 PSI electric over hydraulic actuator. So you're gonna get super fast pressure response, giving you confident braking. And of course all your brake line hoses and everything are flexible.

They have some rubber caps on them right now just for protecting them for shipping and whatnot and packaging, I left them on there. But these are gonna do great. They're flexible so you don't have to worry about things breaking on you. You have more flexibility to route them. And of course the grease cap here, it's gonna be great for those EZ-Lube spindles that have that grease zerk on them. You can simply remove the rubber plug and grease up your spindles, the bearings, and everything internally with ease. And of course, again, all the hardware to mount it, the nuts, bolts, the brake line attachments, and all the anchors and whatnot for hanging them in line. Well folks, I think that's gonna wrap up our quick look together at this DeeMaxx disc brake kit, again, with included actuator for tandem axle trailers. I'm Steve with etrailer. Reach out if you have any questions about this or any other products. And if you don't wanna tackle the install, reach out to us. We can assist you with finding someone local in your area with our dealer locator tool. Thanks for watching.

Ratings & Reviews

4.6

27 reviews
Review sort icon
Tandem-axle trailers put a lot of demand on your brakes, especially when you're towing heavy loads at highway speeds. This DeeMaxx kit replaces drum brakes with hydraulic disc brakes for more consistent stopping power during long tows.

by:



by:



by:



by:



by:



by:



by:



by:



by:



by:

Best upgrade to our 5th wheel. I will do this to every trailer I ever own. The install was straight forward if you have some mechanical knowledge and experience.



by:

Just traveled 800 miles after installing the disc brakes. Stopping distance is half of what it was. So pleased!



by:

Excellent customer service. All of my questions were answered. All of parts arrived the very next day. Parts appear to be of high quality.



by:

We had a rough start getting the right brakes for our Brinkley Z3100. However after ETrailer realized they made an error on the order they were right on top of it, doing everything they could do to make it right. Their people are great, kind, well informed in their products, and communicate very promptly. E Trailer will be my go to supplier for RV, and Trailer needs.
You will not be disapointed with their customer care!



by:

Easy installation, work so much better than stock drums. Some brake pad noise under lite braking.



by:

Angie Z was so helpful and a pleasure to work with.
Will definitely use them again.



by:

Great Service!! Fast delivery.



by:

The first order I made was incorrect due to my mistake, but Amy took care of it had the correct items sent out with the wrong items returned. Everything was very smooth.



by:

Really surprised how quickly parts came. One box looked pretty rough, but all parts appear to be there. Will know more after install and put a few miles on the trailer.



by:

One of the kits was missing all 5 mount bolts, had to run to Hardware store to get replacements. Bolt up is simple & strait forward. Packaging needs to be more substantial as the calpers were floating around in the box & had some scuffing damage.. maybe put some composite straps around boxing so they can be easier to Carry?



by:

Not sure if parts are correct. Brake calipers don't mount t at 3 or 9. Called etrailer they were no help. They told me to call the manufacturer.....



by:

These seem to be great brakes and well-made and my camper stops much better now. I had originally only given the product a one-star rating because of a customer service issue and a bracket problem. But I am changing it to a five-star review because the company president called me directly and worked out the problem. Not only do they have a great product but they are willing to make things right. Great company and great product, well worth the money. The best upgrade I have done to my fifth wheel so far. If you buy the kit for the 6000lb axle, and they send you the open bracket which cannot be installed as the instruction say at the 3 and 9 o’clock positions, call the company and they will send you the correct closed brackets.



by:

Etrailer to the rescue! Extremely high quality direct replacement for DeeMaxx EOH kit DE66AR offered on this site. Our original got damaged after a bearing failure. I actually cary a spare set of bearings which allowed us at a minimum to limp our RV home and avoid an expensive tow. Now I will replace the damaged parts.



by:

I have towed my 16,000lb fifth wheel over 12,000mi since installing the disc brake system. The braking power and control is vastly improved with the disc brakes over the drum brakes. I am certain that I avoided a major accident because of the disc brake system. The kit had everything I needed and the customer service was great.



by:

Have a 2024 Brinkley camper. Barley felt the drum brakes work. Camping in Colorado and the Black Hills was a little stressful with little brake help from the camper. Winter here. I've only took the camper on a test drive (20 miles) with the new disc brakes. They work awesome! All the brake power you need from the camper now.

I ordered the wrong brake kit at first. I needed 9/16" bolts instead of 1/2". Ashley from E-tailer got what I needed coming and gave ups the pickup label right after I called. Thank you Ashley!

As for the brake install. Fairly easy. Not fun, but easy. The hardest part was running and securing the brake lines. And maybe the wiring up the actuator. Instructions were great. Just a little intimidating the first time. Next time will take half the time to do. But I no plains for the next time! Also make sure your brake controller can change to elec. over hdy. Luckily my 2023 F350 did and was easy to change on the screen.

Thank you again Ashley!!



by:

The boxes arrived fully sealed, but there was significant rust on the races of two of the four hubs. I sanded the races to remove it and hopefully it won’t have long term impact. Otherwise, quality looks good and can’t wait to get them installed.


25
25

See what our Experts say about this DeeMaxx Trailer Brakes

  • Recommended Electric Over Hydraulic Conversion Kit for a Boat Trailer w/ 3,500 lbs Axles
    Hey Jeff! Welcome back and thanks for the information! The DeeMaxx Disc Brake Kit w/ Actuator item # DE84NR is exactly what you'll need to upgrade to electric over hydraulic brakes. This kit includes everything you need for your tandem axle trailer including the actuator, brake lines, and rotors. The DeeMaxx item # DE84NR fits your 1-3/8" x 1-1/16" spindle with included inner bearing item # L68149 and outer bearing item # L44649. The brake caliper brackets mount to a four bolt brake flange...
    view full answer...
  • Comparing DeeMax and Hydrastar Disc Brake Kits
    Hey Tim, Deemaxx and Hydrastar are both really nice higher end brands in terms of quality. Both the # HYD22FR and the # DE84FR would work really well for you. That said the DeeMaxx brand is like the most premium and the price tag matches. Hydrastar is for the guy who basically wants the best but doesn't really want to pay for the best... So if it were me and it was my money I would go with the Hydrastar kit part # HYD22FR all day. The actuator that comes with it has a great reputation...
    view full answer...
  • Upgraded Axles and Disc Brakes for 2021 Grand Design Imagine 21BHE
    Hello Tomasz! Thanks for providing all of that information. Your 2021 Grand Design Imagine 21BHE uses an 86-1/2" long axle with a 68-1/2" spring center measurement. For a 3,500 lb axle that matches you need the Lippert Trailer Axle Beam # LC63PK. This comes in the underslung configuration, so you will also need the Dexter Trailer Springs Over-Under Conversion Kit # K71-384-00 to mount your leaf springs on top of the axle. You can replace the leaf springs if they're worn, but if they're...
    view full answer...

Do you have a question about this Trailer Brake?


Info for this part was:

Employee Steven C
Installed by:
Steven C
Employee Wilson B
Updated by:
Wilson B
Employee Matthew S
Updated by:
Matthew S
Employee Amanda M
Edited by:
Amanda M
Employee Dawn Z
Written by:
Dawn Z

At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.