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If you’re ready to ditch the dragging and uneven performance of old drum systems, this Hydrastar Disc Brake Kit w/ Actuator #HYD54FR gives you everything for a full conversion. It’s built for 7,000 lb axles and includes six Dacromet-coated hub-and-rotor assemblies with 9/16" wheel studs and an 8 on 6-1/2" bolt pattern. The electric-over-hydraulic actuator hardwires into your tow vehicle’s brake controller for smooth, even response and shorter stopping distance than most drum setups.
Corrosion is the enemy of trailer brakes, especially around water. Every rotor, caliper, and bracket in this kit is Dacromet-coated for rust resistance that holds up in marine and coastal environments. It’s a true marine-grade system that stays reliable after repeated dunking or exposure to road salt.
Disc brakes shine when it comes to steady braking power at highway speeds. The cast iron integral hub-and-rotor assemblies in this kit meet SAE specifications for strength and friction performance. Their machined surfaces reduce contamination between hub and rotor for long life and consistent braking torque, even under heavy load.
No piecing together separate parts—this kit includes inner bearing 25580, outer bearing 14125A, races 25520 and 14276, seal GS-2250DL?(2.250" ID?/ 3.376" OD), plus all brake lines and fittings for triple-axle setups. You get one 30' main line, one 6' line, six 4-1/4" lines, six 18" rubber flex lines, brass T, X, and union fittings, nylon clamps, and self-tapping screws. Everything bolts to standard 5-bolt brake flanges so you can install confidently without hunting extra pieces.
The included Hydrastar actuator converts your in-cab brake controller signal into hydraulic pressure instantly. It creates smooth braking with fast response time across all six wheels—ideal when towing heavy or descending long grades. The actuator carries a 2-year warranty while the brakes and components are covered for 1 year, giving you dependable performance trip after trip.
Customer Satisfaction Score:
84% were satisfied with this product
16% of customers were not satisfied
Ratings & Reviews
Good
Good to deal with
Customer service was beyond exceptional. Received products in timely fashion. We haven't installed items yet, but they look to be of good quality.
Everything arrived as it should. Packaging was falling apart. Need to do a better job on packaging boxes were extremely heavy. Should put it in more boxes. Customer service was very good to work with called me and let me know something was on back order.And will keep in touch with me.
Some damage in shipping to one of the r otors
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.
Installed these brakes on my 5th Wheel in the summer of 2023. Completed the installation in two easy days with 2 other old men. Takes a little creativity placing hydraulic lines and the pump. Love this conversion. Never go back to drum brakes. Had to go from 10 gain on the drum brakes to 3 gain on the disk brakes. Driving through heavy traffic is so much less stressful knowing I have 10 wheels with disk brakes (6 on the RV and 4 on the truck). Stopping distance is reduced enormously. No problems with any component in the packaged as of 07/2024.
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.
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.
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
Love the Hydrastar brake kit, day and night different in stopping my 13,500 lb. boat trailer over the surge drum brakes. Highly recommend
best thing I could've done! better brake performance and less maintenance!
Excellent product, simple straightforward installation. It would be a good idea if they would include the endcap for the rotor on a conversion like this. Considering what it would have cost to buy all the parts to bring my drum brakes up to speed, it was a simple decision for a better brake system worth the extra few bucks. There are better places to install the hydraulic control then on top of the generator in the forward compartment. I installed mine underneath the propane tank, plenty a room just don't Close the bottom off completely so the ventilation stays intact for the propane.
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Ken
12/23/2022
The brake system works very well. So so much better than the drum system. And super happy with the brake system.