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  1. Trailer Brakes
  2. Hydrastar
  3. Disc Brakes
  4. 7000 lbs Axle
  5. Hub and Rotor
  6. Marine Grade
Hydrastar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 1/2" Studs - 8 on 6-1/2 - 7K

Hydrastar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 1/2" Studs - 8 on 6-1/2 - 7K

Item # HSE7K-TR1
Retail:$3,277.47
Our Price: $3,264.37
You Save: $13.10
Trailer Brakes
Shipping Weight: 338 lbs
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Kit includes everything you need to switch your trailer over to disc brakes for improved performance and greater stopping power. Dacromet-coated brakes are corrosion resistant. Perfect for use with boat trailers. Great Prices for the best trailer brakes from Hydrastar. Hydrastar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 1/2" Studs - 8 on 6-1/2 - 7K part number HSE7K-TR1 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (9)
  • Q & A (0)
  • Photos

Hydrastar Trailer Brakes - HSE7K-TR1

  • Disc Brakes
  • 7000 lbs Axle
  • Hub and Rotor
  • Marine Grade
  • 8 on 6-1/2 Inch
  • Hydrastar
  • 1/2 Inch Studs

Kit includes everything you need to switch your trailer over to disc brakes for improved performance and greater stopping power. Dacromet-coated brakes are corrosion resistant. Perfect for use with boat trailers.


Features:

  • All-inclusive kit has everything you need to switch your trailer over to disc brakes
    • 6 Disc brake end kits
      • Hub-and-rotor assemblies
      • Grease seals, caps, races and bearings
      • Calipers with mounting brackets and hardware - attach to 5-bolt brake flanges
    • Hydrastar electric-over-hydraulic brake actuator
      • Hardwires into tow vehicle and signals in-cab brake controller when brakes are applied, triggering pump and motor on actuator
      • Creates smooth, even braking with fast response time
      • Works with most in-cab brake controllers (sold separately)
    • Line kit with brake lines and fittings for triple-axle trailers
  • Disc brakes deliver better performance
    • Consistent stopping even at highway speeds
    • Shorter stopping distance than most drum brakes
  • Trailer coupler not included


Specs:

  • Axle capacity: 7,000 lbs
  • Bolt pattern: 8 on 6-1/2"
  • Rotor diameter: 13"
  • Wheel stud diameter: 1/2"
  • 3-Year warranty


Bearings, Race, and Seal Information:

  • Bearings
    • Inner bearing 25580
    • Outer bearing: 14125A
  • Races
    • Inner race: 25520
    • Outer race: 14276
  • Seal: GS-2250DL
    • Inner diameter: 2.250"
    • Outer diameter: 3.376"

Complete Kit Includes:

  • Hydrastar electric-over-hydraulic trailer brake actuator
  • 7K disc brake kit including hub-and-rotor assemblies with bearings, races, and seals
  • Hydraulic triple-axle brake line kit
    • (1) 30' Long brake line - 3/16"
    • (1) 6' Long brake line - 3/16"
    • (6) 4-1/4" Long brake lines - 3/16"
    • (6) 18" Male/male rubber flex lines
    • (3) 3/16" Brass T-fitting
    • (2) 3/16" Brass union fitting
    • (1) 3/16" Brass X-fitting
    • 1/2" Nylon hose clamps
    • 3/16" Nylon hose clamps
    • Self-tapping screws

Disc Brakes

More and more people are switching their trailers over to disc brakes, and with good reason. Disc brakes deliver consistent braking - even at highway speeds - unlike drum brakes, which often show a substantial drop in braking torque at higher speeds. In addition, disc brakes offer a substantially shorter stopping distance than drum brakes. Disc brake calipers have only one moving part, rather than the many found in drum brakes. This means that there are fewer parts to maintain, fewer parts to get damaged and fewer parts to have to repair or replace, thus reducing maintenance costs.


Integral Hub-and-Rotor Assemblies

The integral hub-and-rotor is made from cast iron, matching SAE specifications. Cast iron is ideal for high-temperature operations and offers a favorable friction coefficient to ensure adequate stopping power. Furthermore, machined disc brakes minimize the chance of contamination between the hub and rotor, resulting in excellent performance and long life.



E7K-TR1 Hydra Star Disc Brake Kit w/ Actuator for Triple Axle Trailers - 13" Hub/Rotor - 8 on 6-1/2 - 7K





Customer Satisfaction Score:


Customer Reviews

Hydrastar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 1/2" Studs - 8 on 6-1/2 - 7K - HSE7K-TR1

Average Customer Rating:  4.4 out of 5 stars   (9 Customer Reviews)

Kit includes everything you need to switch your trailer over to disc brakes for improved performance and greater stopping power. Dacromet-coated brakes are corrosion resistant. Perfect for use with boat trailers.

by:

This is a great upgrade to any large trailer. I have a 44’ toy hauler, w/ triple Lippert 7000lb axles. We’ll worth the $$. Took me about 12 hrs to install.



by:

Hello we have a triaxle 45' Toater trailer combination we use for racing. Total rolling loaded weight is 46k. The trailer was equipped from factory with electro magnetic brakes that in combination with the air brakes on the truck using digital controller was very ineffective ! WE installed these and it now stops like your car ... VERY VERY good solution ! we had one clearance problem with the top caliper bolt and the inner finder that was easily modified for clearance. This solution is a effective easy to install and it improved my trailer stopping power 100% ... also you will need a double flair tool for a clean instillation



by:

Finally installed after snow fell, Did not use supplied bearings as they were shipped loose in a plastic bag and not wrapped up and individually boxed as when you buy from a bearing supplier, so I purchased new timkin taper bearings and installed them instead. Bleeding the system was simple enough, now I just have to wait till spring to road test system.



by:

Disappointed in how this item was packaged and shipped. You can’t ship stuff out in a box of 108 lbs with ups, what are these people thinking in the shipping department.

Katrina B.

10/10/2022

This is not good at all! I see that our customer service department is currently working on your damage claim with UPS.



by:

Customer service was beyond exceptional. Received products in timely fashion. We haven't installed items yet, but they look to be of good quality.



by:

Good to deal with



by:

Good



by:



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9
9

See what our Experts say about this Hydrastar Trailer Brakes

  • Recommended Comfort Ride Suspension and Disc Brake System for a Triple Axle Trailer w/ 7k Axles
    Thanks for the pictures! The correct Comfort Ride System for your triple axle trailer is the Roadmaster Comfort Ride Leaf Spring Suspension Kit w/ Shock Absorbers item # RM-2460-2570-3. As far as a disc brake conversion goes, we have options for both 1/2" and 9/16" lug studs so you don't have to change out your wheels. You'll need to take a measurement of your studs to confirm what size you have. With a 7,000 lbs axle and an 8 on 5-1/2 lug pattern you could go either way and that axle...
    view full answer...
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  • Replacement Electric Over Hydraulic Disc Brake Kit For Triple Axle Enclosed Car Hauler
    Yes, the HydraStar Disc Brake Kit # HSE7K-TR1 can be used with triple axles on an enclosed car hauler. As this kit uses a hub/rotor combination your off set will stay the same as opposed to kits that use a rotor that slides onto a separate hub. The kit includes all 6 brake assemblies with an 8 on 6-1/2" bolt pattern and 1/2" wheel studs. You will need to verify that this is what your current hubs use so that you will not need to change your wheels. Also you should verify that you have...
    view full answer...
  • Does Factory Brake Controller for 2021 Chevy/GMC Work With HydraStar Disc Brake Kit With Actuator
    I reached out to the manufacturer, HydraStar, who told me the factory brake controller in your 2021 GMC Sierra 3500 is absolutely compatible with the HydraStar actuator that comes with the HydraStar Disc Brake Kit with Actuator for Triple Axle Trailers # HSE7K-TR1. They verified that the actuator in the kit is compatible with Chevy & GMC trucks from 2018 to present so you do not need any type of adapter. I have added links below to a video review and install for you to check out as well...
    view full answer...
  • Difference Between HydraStar Disc Brake Kit HSE7K-TR1 & HSE7K-TR1SO for 7K Triple-Axles
    The difference between the two HydraStar Disc Brake Kits with Actuator for Triple Axle Trailers is that one comes with a complete hub-and-rotor assembly while the other is just the slip-on rotors without the hubs. What that means is that if you need new hubs with the brake kit you will want the HydraStar Disc Brake Kit with Actuator for Triple Axle Trailers - 13" Hub/Rotor # HSE7K-TR1. If your hubs are in fine shape and you just want the kit with the slip-on rotors you will want the HydraStar...
    view full answer...
  • Material of HydraStar Disc Brake Kit & Do They Fit Dexter 7,000 lb Axles
    The hub as well as rotors are cast iron for the disc brake kit from HydraStar you asked about: - HydraStar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 13" Hub/Rotor - 8 on 6-1/2 - 7K # HSE7K-TR1 They are dacromet-coated as well to help ensure corrosion resistance. I can verify for you that the HydraStar Kit # HSE7K-TR1 does in fact fit Dexter 7,000 lb axles, as they have the correct bearings (25580 and 14125A) and grease seal (GS-2250DL) for that axle.
    view full answer...
  • Comparing 7K Hydrastar Disc Brake Kits for Tandem and Triple Axle Trailers
    The Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 7K is part # HSE7K-T1 is for tandem axle trailers and the Hydrastar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 7K is part # HSE7K-TR1 is for triple axle trailers. The only difference between the two is that you'll get an extra hub/rotor with the latter since it's designed for triple axle trailers.
    view full answer...
  • Will The HydraStar Disc Brake Kit for Triple Axle Trailers Be Compatible With 7k Dexter Axles
    Yes, the HydraStar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 13" Hub/Rotor - 8 on 6-1/2 - 7K # HSE7K-TR1 should be a compatible fit for your triple 7k Dexter axles. You'll just want to double check that the bearings match your spindle. This kit uses Inner bearing # 25580, Outer bearing # 14125A, Inner race # 25520, Outer race # 14276, and Grease Seal # GS-2250DL.
    view full answer...
  • Recommended Disc Brake Kit for a Fuzion 429 Toy Hauler
    In order to choose a disc brake kit for a trailer you'll need to know the axle capacity. The HydraStar Disc Brake Kit part # HSE7K-TR1 is what I recommend for a 7K axle capacity. It comes with everything needed to make the swap and the integrated hub and rotor design helps avoid compatibility issues with selecting the correct hubs. If you have a different axle capacity please just let me know and I'd be glad to see if we have another kit.
    view full answer...
  • Will the Redarc Brake Controller work on Electric over Hydraulic Brakes on a Triple Axle 5th Wheel?
    Yes the Redarc Tow-Pro Elite Trailer Brake Controller # RED44FR is compatible with electric over hydraulic braking systems on up to 3 axles. So it will work with the installation of the HydraStar Disc Brake Kit w/ Actuator for Triple Axle Trailers # HSE7K-TR1. By upgrading to the hydraulic disc brake kit this will greatly increase the amount of stopping force that your 2019 Dutchman Voltage Epic 3970 will have. You will not need a more powerful brake controller as the Redarc will be all...
    view full answer...
  • Does HydraStar Disc Brake Kit w/ Actuator Fit Triple Axle Trailer with Spread Axles
    Yes the brake lines that run from axle to axle of the HydraStar Disc Brake Kit w/ Actuator # HSE7K-TR1 are long enough to be used on your trailer that has a slightly wider axle spread. The lines are 4-1/4 feet.
    view full answer...
  • Will Hydrastar Disc Brake Kit Fit 7k Lippert Axles
    Yes, the Hydrastar Disc Brake Kit w/ Actuator for Triple Axle Trailers # HSE7K-TR1SO will fit over hubs with an 8 on 6-1/2 bolt pattern on your 7k Lippert axles. If you don't already have idler hubs you can use the # AKIHUB-865-7-2-EZ-K. The other option is to get the full hub and rotor with # HSE7K-TR1. You will need a brake controller that is compatible with electric over hydraulic like the Prodigy P3 # 90195.
    view full answer...
    Image 1 for
  • Lippert Center Point and Electric-Over-Hydraulic System for a 2017 Dutchman Voltage 3005
    The closest axle that we have to what you're needing is the Trailer Axle Beam with Easy Grease Spindles # e55GR rated for 5,200 lbs. This has an 89" hub-face measurement and a 74" spring-center measurement which is really close to what you have but slightly off so I recommend having a shop custom-order one for you to make sure it matches up directly. For the Lippert Center Point you need the kit # LC1565401 which is their setup for triple axle trailers (which is what I'm seeing for your...
    view full answer...
  • Is Hardware for Mounting Brake Lines to Trailer Included with HydraStar Disc Brake Kit # HSE7K-TR1
    The HydraStar Disc Brake Kit w/ Actuator # HSE7K-TR1 does include the necessary hardware to attach the brake lines to the trailer, however they do not utilize c-clamp style rubber lines so these clamps are not in the kit. In addition to this hardware, the HydraStar electric-over-hydraulic actuator, and the hub-and-rotor assemblies, this kit also includes the following components: (1) 30' Long brake line - 3/16" (1) 6' Long brake line - 3/16" (4) 4-1/4" Long brake lines - 3/16" (6) 18"...
    view full answer...
  • Why Is My Brake Fluid Coming Out Discolored When Bleeding the Brakes
    If the brake fluid that came out when bleeding the brakes after a disc brake conversion # HSE7K-TR1 came out discolored then there's a contaminant or water in the lines somewhere. The only way to clear it out would be to run more fluid through it to pass all of the contaminant out. You'll want to bleed the brake assembly furthest from the actuator first and work your way closer to the actuator.
    view full answer...
  • Can etrailer Install Disc Brakes on 2017 Sundowner Toy Hauler
    We could definitely install a disc brake kit like the # HSE7K-TR1 or # HSE7K-TR1SO on your 2017 Sundowner Toy Hauler. Our facility is located in Wentzville, MO so as long as that isn't too far for you we would be happy to do the conversion. If you don't live close then we can still help you out through our network of installers. On each product page there is a "Locate installers near me" link under the installation and review videos. You can also find that same link below on this answer page.
    view full answer...
  • Weight Difference of HydraStar Disc Brake Kit w/ Actuator for Triple Axle Trailers From Drum Brakes
    The weight difference is truly negligible when moving from hydraulic drum brakes to the HydraStar Disc Brake Kit with Actuator for Triple Axle Trailers # HSE7K-TR1. The HydraStar kit weighs just over 300 lbs, and a good estimate for six hub and drums with six hydraulic brake assemblies is going to be about 300 lbs as well, give or take. So you truly won't have anything to worry about in regards to adding additional weight to your trailer when switching to the HydraStar kit. What you will...
    view full answer...
  • Availability of HydraStar Disc Brake Kit w/ Actuator for Triple Axle Trailers With 9/16 Wheel Studs
    Hydrastar offers a version of the # HSE7K-TR1 that features rotors with 9/16 inch wheel studs. We carry the kit as part # HYD54FR. The kit includes: • HydraStar electric-over-hydraulic trailer disc brake actuator • 7K disc brake kit including hub-and-rotor assemblies with bearings, races, and seals • Hydraulic triple-axle brake line kit - (1) 30' Long brake line - 3/16" - (1) 6' Long brake line - 3/16" - (6) 4-1/4" Long brake lines - 3/16" - (6) 18" Male/male rubber flex...
    view full answer...
  • Determining Which HydraStar Disc Brake Kit Fits 2017 Grand Design Momentum W/ Triple Axles
    I would be happy to help you determine which disc brake kits fits your 2017 Grand Design Momentum M399TH Toy Hauler but you will need to first confirm your bearing combination. The easiest way to do this is by removing one of your current hub assemblies and checking the face of both the inner and outer bearings for a stamped bearing number as shown in the included picture of the # L44649. If your bearings are worn to the point that you cannot read the bearing numbers then you will need...
    view full answer...
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  • Parts to Switch From Electric Drum to Electric-Hydraulic Disc Brakes on 6,000 lb Dexter Triple Axle
    Thank you for all that info, and we do have the exact kit you need to replace the electric drum brakes on your toy hauler with 6,000 lb Dexter axles. The kit that comes with everything you need, including hubs with an 8 on 6-1/2" bolt pattern and 1/2" wheel studs is from HydraStar: - HydraStar Disc Brake Kit with Actuator for Triple Axle Trailers # HSE7K-TR1 The HydraStar # HSE7K-TR1 comes with hub-and-rotor assemblies that fit the spindle of your Dexter 6k axle, an electric-over-hydraulic...
    view full answer...
  • Parts to Convert 2017 Grand Design Momentum 376TH to Electric Over Hydraulic Disc Brake
    Thanks for the picture of your axle sticker. From that I can tell that your 2017 Grand Design Momentum 376TH has 7k axles which is exactly what the HydraStar Disc brake kit part # HSE7K-TR1 was designed to fit so it would work great on your trailer and with your 2016 Ford F-350 brake controller that has hydraulic mode.
    view full answer...
    Image 1 for
  • Does HydraStar Disc Brake Kit With Actuator for Triple Axle Trailer Have Option for 7K Oil Hubs
    We do have a way for you to use the HydraStar electric-over-hydraulic actuator for disc brakes with 7,000 lb oil hubs, but there is not a direct option for an entire kit that uses oil hubs; it is necessary to use grease with the hubs on the HydraStar Disc Brake Kit with Actuator for Triple Axle Trailers # HSE7K-TR1. Instead, you would need to piece together three disc brake kits (one for each axle) that fit the same spindle as the HydraStar hubs, along with the actuator and brake lines....
    view full answer...
  • How To Find Correct Disc Brakes for 2018 Jayco Seismic 5W Toy Hauler
    In order to choose the correct disc brake conversion kit for a 2018 Jayco Seismic 5W Toy Hauler, you'll need to know your axle capacity. This can be found easiest on the axle tag which requires crawling under the trailer. I looked up some of the different floorplans and would estimate that you have 7,000 lb axles, in which case the HydraStar Disc Brake Kit w/ Actuator for Triple Axle Trailers part # HSE7K-TR1 is what I recommend for a complete kit. It comes with everything you need; actuator,...
    view full answer...
  • Kit to Convert Lamar Gooseneck Trailer with Triple Axle 7k Lippert Axles to Electric Over Hydraulic
    For your trailer that has a 7k triple axle trailer with 8 on 6-1/2 inch bolt pattern the correct kit that comes with everything needed to convert it to electric over hydraulic disc is the HydraStar part # HSE7K-TR1 that you referenced. This comes with the best actuator, all the brake lines you'd need, and coated brake hub/rotors that will bolt right up to your 5 lug mounting flange.
    view full answer...
  • Availability of 7K Disc Brake Kit w/ Actuator for Triple Axle Trailers with 9/16 in Wheel Studs
    Yes we do have a version of the Hydrastar Disc Brake Kit w/ Actuator for Triple Axle Trailers # HSE7K-TR1 that has 9/16 inch diameter wheel studs with the part # HYD54FR.
    view full answer...


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Installed by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
Noah M
Employee Manda E
Updated by:
Manda E
Employee Carrie F
Updated by:
Carrie F
Employee Shane H
Test Fit:
Shane H
Employee Jacob H
Test Fit:
Jacob H
Employee Jonathan Y
Video by:
Jonathan Y
Employee John S
Video by:
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Employee Rick G
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