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  1. Trailer Brakes
  2. Hydrastar
  3. 7000 lbs Axle
  4. Disc Brakes
  5. Hub and Rotor
  6. 8 on 6-1/2
Hydrastar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 13" Hub/Rotor - 8 on 6-1/2 - 7K

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

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Our Price: $2,932.59
Trailer Brakes
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Shipping Weight: 326 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. Lowest Prices for the best trailer brakes from Hydrastar. Hydrastar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 13" Hub/Rotor - 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.
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  • Reviews (5)
  • Q & A (0)
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  • Why etrailer?

Hydrastar Trailer Brakes

  • 7000 lbs Axle
  • Disc Brakes
  • Hub and Rotor
  • 8 on 6-1/2
  • Boat Trailer
  • Snow Trailer
  • 1/2 Inch Studs
  • Hydrastar

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

Item # HSE7K-TR1






Customer Reviews

Hydrastar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 13" Hub/Rotor - 8 on 6-1/2 - 7K - HSE7K-TR1

Average Customer Rating:  4.8 out of 5 stars   (5 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:

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:

Good to deal with



by:



by:

Good


5
5

Ask the Experts about this Hydrastar Trailer Brakes



  • 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...
  • How To Switch from Electric Drum to Hydraulic Disc Brakes On a 2017 Grand Design Solitude 374TH
    In order to convert the electric drum brakes on a 2017 Grand Design Solitude 374TH to hydraulic disc I recommend using the HydraStar Disc Brake Kit w/ Actuator for Tandem Axle Trailers part # HSE7K-TR1. This kit comes with absolutely everything you need to make the swap aside from some miscellaneous wiring connectors.
    view full answer...
  • Triple Axle Disc Brake Conversion Kit
    The HydraStar Disc Brake Kit item # HSE7K-TR1SO is designed for trailers with 7K axles and an 8 on 6-1/2" bolt pattern. This conversion kit would work great on your 42 1/2 foot travel trailer. 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. This kit comes with bearings, races, and seals so you won't be needing to purchase those separately.
    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...
  • How To Run Steel and Rubber Lines For Disc Brakes In Trailer
    I understand why it would seem confusing running the steel and rubber lines for disc brakes on your trailer that come in a disc brake kit like part # HSE7K-TR1. The steel lines are the main lines on the trailer and the rubber lines extend to the brake assemblies. I have attached a tandem axle diagram for your reference.
    view full answer...
    Image 1 for
  • 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...
  • 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...
  • Is Hydrastar Actuator Compatible with Integrated Brake Controller of 2019 Ram 3500
    The integrated brake controller of your 2019 Ram 3500 is compatible with the Hydrastar actuator kit part # HSE7K-TR1 that you referenced. The parts are galvanized which protects from corrosion well. The rotors are made by Kodiak.
    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...
  • 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...
  • 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...
  • 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...
  • How To Add Disc Brakes To a High-Tech Marine Triple Axle Trailer
    The HydraStar Disc Brake Kit w/ Actuator for Triple Axle Trailers part # HSE7K-TR1SO is an excellent option to add disc brakes to a triple axle trailer. The 14125A outer bearing tells me you have a 5,200 lb to 7,000 lb axle so the above kit should work just fine. That said, in order to prevent any potential issues with the hub lining up with the rotor, the part # HSE7K-TR1 would be a safer bet.
    view full answer...
  • What Parts are Required to Convert Electric Drum Brakes to Disk Brakes on My Grand Design Toy Hauler
    In order to convert your 2022 Grand Design Momentum 5w toy hauler from drum brakes to disk brakes, it depends on if you have triple 7k axles or tandem 7k axles. For a complete kit for both options, I recommend the following parts: - HydraStar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 13" Hub/Rotor - 8 on 6-1/2 - 7K # HSE7K-TR1 (triple axle) - HydraStar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 13" Hub/Rotor - 8 on 6-1/2 - 7K # HSE7K-T1 (tandem axle) The great...
    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...
  • Parts Needed To Change Electric Drum Brakes On 2021 Grand Design Momentum W/ 7K Axles To Disc Brakes
    I would be happy to help! To change the electric drum brakes on your 2021 Grand Design Momentum 5th Wheel Toy Hauler with triple 7,000lb axles to electric over hydraulic brakes I recommend the HydraStar Disc Brake Kit w/ Actuator for Triple Axle Trailers # HSE7K-TR1 as it comes with everything you need. This kit includes the six hub/rotor assemblies to replace your current hub and drum assemblies along with the calipers, mounting brackets, brake pads, brake lines, fittings, and electric...
    view full answer...
  • What is the Difference Between the HSE7K-TRI and HSE7K-TR1SO
    The difference between these two kits is that the # HSE7K-TR1 comes with a complete hub and rotor that replaces your existing hub, where the # HSE7K-TR1SO is only the rotor which slips over your existing hubs. The hub that is included with the # HSE7K-TR1 requires that your current hubs use inner bearing # 25580 and outer bearing # 14125A, so if your hubs have different bearings using the rotor only kit would be the best option. You will want to confirm that you've already got idler hubs...
    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
  • Replacement Disc Brake Pads For Triple Axle Trailer With 7000lb Axles
    For replacement disc brake pads for the HydraStar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 13" Hub/Rotor - 8 on 6-1/2 - 7K # HSE7K-TR1 on your triple axle trailer with 7000lb axles you will need the Kodiak Ceramic Brake Pads - 7,000 lbs to 8,000 lbs # K250CP. I included a video of the # K250CP for you to take a look at.
    view full answer...
  • Compatibility of HydraStar HSE7K-TR1 Disc Brake Kit w/ Actuator On 7K Axles
    The HydraStar # HSE7K-TR1 disc brake kit you mentioned is designed for 7K axles. I don't have access to a database that would tell me what your 5th wheel came equipped from the factory with, but it's pretty easy to figure out. The disc brake rotors included in the kit will replace hub/drums that use the 25580 inner and 14125A outer wheel bearing and the GL-2250DL grease seal all of which are typical for a 7K axle. I'd recommend looking at your inner and outer wheel bearings and getting...
    view full answer...
  • 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...
  • Recommended Electric to Hydraulic Disc Conversion for a Grand Design Momentum 399TH
    The best option we offer for converting the electric drum brakes on a Grand Design Momentum 399TH to hydraulic disc is with the HydraStar Disc Brake Kit part # HSE7K-TR1. There is a lot of components needed for the conversion and making sure all said components are compatible can be challenging, even for the pros. This is why I like this option because it's a complete kit that has everything you need, therefore no worrying or extra trips to the parts stores. This kit is designed for 7K...
    view full answer...
  • Bearing Buddy For The 13" HydraStar Disc Brake Kit Hub/Rotor - 8 on 6-1/2 For 7000 LB Axles
    The correct bearing buddy for the HydraStar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 13" Hub/Rotor - 8 on 6-1/2 - 7K Item # HSE7K-TR1 is going to be Bearing Buddy Bearing Protectors - Model 2717SS - Stainless Steel (Pair) Item # BB2717SS.
    view full answer...
  • Does HydraStar Disc Brake Kit With Actuator Work With 2007 Chevy Silverado Factory Brake Controller
    The HydraStar Disc Brake Kit with Actuator for Triple Axle Trailers # HSE7K-TR1 will work with the factory brake controller of your 2007 Chevy Silverado, but you'll just need an adapter, the HydraStar Electric Over Hydraulic Actuator Adapter Module for Ford and Chevy Brake Controllers # HBA-CAM. What this adapter does is simply splice in between your trailer plug and the actuator to ensure compatibility between the actuator and brake controller. This will be all you need in order to use...
    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 Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Installed by:
Kathleen M
Employee Shane H
Test Fit:
Shane H
Employee Jonathan Y
Video by:
Jonathan Y
Employee Kristina F
Written by:
Kristina F
Employee Noah M
Updated by:
Noah M
Employee Manda E
Updated by:
Manda E

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