If your trailer’s stopping feels weak or uneven, this Hydrastar disc brake kit brings a major performance upgrade. The electric-over-hydraulic actuator ties into your existing in-cab brake controller to create fast, consistent braking across both wheels. It delivers shorter stopping distances than drum brakes and keeps control steady even at highway speeds.
When it’s time to service your brakes, these 12" Dacromet-coated rotors make the job quick and clean. Each rotor slips right over your standard idler hub and uses your existing wheel bolts for easy install. Because the hub and rotor are separate parts, you can replace one without having to junk the other—saving time and money down the road.
Heavy braking generates heat that can fade performance fast. These cast iron rotors meet SAE specifications and are vented to move air through the rotor core, shedding heat efficiently under load. The design helps prevent heat-related wear while maintaining smooth, reliable braking performance on long grades or during repeated stops.
This all-in-one kit comes ready to convert a single 6,000-lb axle with a 6 on 5-1/2" bolt pattern. It includes the electric-over-hydraulic actuator, two disc brake end kits with rotors, calipers, bearings (25580 inner and 15123 outer), races (25520 inner and 15245 outer), grease seals with 2.25" inner and 3.376" outer diameters, and all necessary hydraulic lines and fittings. Everything you need for a clean install is in one package—down to the self-tapping screws and hose clamps.
Each component is designed for durability in real-world conditions. The Dacromet coating resists corrosion while keeping performance consistent over time. The actuator carries a 2-year warranty, and the brakes and components are covered for 1 year—giving confidence that this system will keep delivering strong, dependable braking season after season.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello everybody, this is Jeff at etrailer.com. Today we're gonna take a look at the Hydrastar slip-on rotor disc brake kit with the electric over hydraulic brake actuator for a single 6,000-pound trailer axle with a six on five and a half-inch bolt pattern. Now this is an all inclusive kit, so this will have everything you need to switch the trailer over to disc brakes for improved performance and greater stopping power. The over-the-hub rotors are very easy to install. You just slide them over your standard idler hubs and then they're held in place by your existing wheel lug nuts. So there's no need to have to replace your entire hub and rotor assembly if only the hub or the rotor becomes damaged.
It will include everything shown here on the table. Contains two disc brake end kits for one axle. We'll start again with the slip-on Dacromet-coated cast iron rotors are included, two of those. Comes with the inner bearings, the outer bearings, the grease seals. Comes with the Dacromet-coated calipers, have the brake pads and installation bolts included.
And if you notice, we attached them to the Dacromet-coated caliper mounting brackets, which are designed to bolt to a five-bolt brake flange on your axle. Now the Dacromet coating we mentioned on all these parts is on the rotors, the calipers, caliper mounting brackets is corrosion resistant. Now right here is a Hydrastar electric over hydraulic brake actuator. This will hardwire into your tow vehicle and it signals your in-cab brake controller when the brakes are applied. This will trigger the pump and motor on the actuator, which will create a nice, smooth, even braking with a fast response time.
It will work with most in-cab brake controllers. Now also, if you notice, it'll come with all the brake line kits you need. The solid brake lines right here, flexible brake lines, and all the fittings you need to work on a single axle trailer. Now we do list on the product page of this product all of the part numbers that are included with this kit that we just run over. And more and more people are switching their trailers over to disc brakes and with good reason 'cause unlike drum brakes, the disc brakes will deliver consistent braking even at highway speeds.
The disc brakes also offer a substantially shorter stopping distance, and the disparate calipers have only one moving part in them. So there are fewer move parts to maintain, fewer parts to get damaged, and even fewer parts to have to repair or replace. Again, a few specs on this, application is a single axle trailer with a 6,000-pound axle. Bolt pattern again, six on five and a half inches, and the diameter on the rotor is 12 inches. But that should do it for our look at the Hydrastar slip-on rotor disc brake kit with the electric over hydraulic brake actuator for a single 6,000-pound trailer axle.
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