What Info Is Needed to Add Brakes to a Trailer Axle
Updated 11/13/2025 | Published 10/16/2025
Question:
Armature Plates: I have a 50’s airstream Bubble. It was supposed to come with e brakes, but it didn’t. What do you know about armature plates that bolt to the inside of the drum for the magnets to contact? Thanks, Larry
asked by: Larry G
Expert Reply:
Hey Larry, we can definitely help you add brakes to your trailer hubs as long as the axles were made within the past couple decades. What you described is standard for electric trailer drum brakes and how they operate with the armature using a magnet to grab the inside of the drum and apply the brakes. If you can get me the axle capacity and the wheel bolt pattern of your hub I can get you what you would need to add brakes to your trailer axle. I also attached a help article on adding brakes for you to check out as well.
Product Page this Question was Asked From
Hopkins Plug-In Simple Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- No Converter
- Factory Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Visible
- Hopkins
more information >
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Jameson C.
11/13/2025
Hey Larry, were you able to find the axle capacity and wheel bolt pattern for your Airstream Bubble? Once you have those details, I can help narrow down the right brake setup for your trailer. Let me know what you find—I'm here if you need a hand.