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Brake Kit Selector

Find Your Brake Kit

Answer a few questions about your axle setup and we'll show you the exact Hydrastar kit for your trailer.

Step 1 of 5

Pick the axle capacity and bolt pattern that matches your trailer. Check the sticker on your axle beam or GVWR plate.

Check the sticker or tag on your axle beam - it lists the capacity in lbs and the bolt pattern. You can also check your trailer's title or the manufacturer plate near the tongue.

Count the studs on one wheel hub and note the bolt circle diameter (e.g. 5 on 4-1/2 in., 8 on 6-1/2 in.).

Look at one of your wheel hubs and count the threaded bolts sticking out. Then measure the diameter of the circle they form - e.g. 5 studs on a 4.5 in. circle = 5 on 4-1/2 in.

Measure the diameter of one stud shaft. Common sizes: 1/2 in., 9/16 in., or 5/8 in.

Use a caliper or ruler to measure the diameter of one stud shaft. Common sizes are 1/2 in., 9/16 in., and 5/8 in.

How many axles does your trailer have?

Disc brakes offer better performance. Drum brakes are the traditional option.

Disc brakes offer better stopping power, heat dissipation, and are ideal for heavier loads or frequent use. Drum brakes are the traditional option and are more common on older trailers.

Complete all steps above to see matching brake kits.