If your old drum brakes are pulling or fading, this Hydrastar kit brings modern stopping power to your tandem-axle setup. The included electric-over-hydraulic actuator ties into your existing in-cab brake controller and delivers smooth, even braking with fast response time. At highway speeds it keeps stopping consistent and controlled, giving you shorter, more predictable stops when it matters most.
Corrosion and rust are no match for the stainless steel calipers and Dacromet-coated hub-rotor assemblies in this kit. The rustproof calipers hold up to moisture and road grime, while the coated rotors resist wear over time. If you tow through different environments or deal with damp conditions, those stainless calipers are a big plus for keeping the braking system working smoothly season after season.
This kit arrives ready to bolt on with everything needed for a tandem-axle setup—four hub-and-rotor assemblies with inner (L68149) and outer (L44649) bearings, grease seals, stainless calipers, hydraulic brake lines, brass fittings, nylon hose clamps, and self-tapping screws. The actuator mounts to the trailer frame and connects to the wiring you already have. With 5 on 4-1/2" rotors, 1/2" studs, and 3,500 lb axle capacity, it’s designed as a true all-in-one upgrade.
Disc brakes have only one moving part per caliper—so there’s less to maintain or replace compared to drums. When you step on the pedal, the actuator applies steady hydraulic pressure for predictable braking on every wheel. That means fewer adjustments over time and more confidence every time you tow.
The actuator carries a 2-year warranty, while the brakes and components are covered for one year. It’s a dependable setup built to deliver reliable performance mile after mile without constant upkeep or guesswork.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
Great setup. Really improved the stopping power of my 36' fifth wheel. Just completed a coast to coast trip. The extra stopping power provided additional safety and peace of mind.
It's been working great for the past year. Wish I had the money to put on all of my trailers.
The quality of the product was good. Everything went together and function as intended. Thanks
Installed fairly easily, works great. Stops much faster than the old drum brakes.
Parts were shipped and received quickly, everything mounted up right and all the hardware needed was included.
Thanks for quickly resolving the shipping problem!!
Nice quality, fast shipment, and fairly easy installation. The brake line from the actuator to the first axle is quite long. I will go back with a custom line in the future, for now just coiled it up. William S was extremely helpful with my order.
Overall a great kit. Only wish would be to use rubber lined SS adel clamps instead of the supplied plastic ones
The items seen good quality but the problem is with Hydrastar as a company, calling out customer service, packaging and shipping departments. If it wasn't for great effort from Fred at etrailer I don't thinkl I would try working with this brand again. The packaging was so bad that the rotors ate themselves up. The studs on one rotor scared the other inside the area where the dust cap sits also ruining several studs. The exterior box was in great shape. It was all on Hydrastar. After a week of waiting Fred finally reached someone. I finally received the replacements with the same subpar boxing as before. This time with only minor scratches. Install went well until we opened the actuator box and found a smashed cap. After another two weeks we finished this two month process with success. Don't try this during camping season and not without etrailers help.
Products just arrived yesterday, even though i requested packaging to be better (saw poor review comments on this before hand), it arrived in 2 large boxes that were battered to hell and opened up with contents exposed. Much to my surprise, it appears all parts are present and undamaged, going to install over weekend and will follow up with after install evaluation.
Prices, promptness of shipping and delivery, and customer service is the best I have ever done business with.
looks great,not done yet.
Lauren is the best.
Great product...fast shipping
The manual is pretty bad, mostly because of the wiring diagram. FORTUNATELY, the assistance from etrailer and all the install videos are very helpful!
BUT, there is a need for some videos on installing all of this on a Travel Trailer. Mine is big and heavy, hence needing this kit to start with. Wiring the actuator has been a headache and a challenge because of bad diagrams, manuals and the unique layout of a Travel Trailer vs 5th wheel. The brake parts came in good shape and are of good quality. Yes, the brake parts are hefty and need better packaging from the manufacturer. Fortunately, all arrived successfully in the end.
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