How To Determine The Correct Disc Brakes For Triple Axle Aluminum Boat Trailer
Updated 10/22/2025 | Published 04/10/2025
Question:
hello i have a triple axel Aluminum I beam boat trailer. Hoe do ai determine which disc brakes fit? is there such a thing as electric over hydrolic disc brakes? the tires are 75R15 5000 lb axels
asked by: Justin W
Expert Reply:
Hello Justin, thanks for reaching out. If you are needing to replace just one hub or rotor, I would need to know exactly what brand of brakes you have currently. Replacement brake parts are brand specific, and there would be no way to look up your trailer to know what you have. For a hub I would also need to know your inner and outer bearing sizes, since the 5,000 lb axles do not really have a standard for that.
If you are looking to replace everything on all 3 axles I would mainly need to know your bearing size and hub bolt pattern.
There is such thing as electric over hydraulic disc brakes. This is generally recommended for 5th wheel campers, but if you want to look into it for your trailer, the article I linked for you below will be a great starting point. I also linked an article that shows how to measure the bearings and hubs and everything.
If you can tell me your bearing sizes and hub bolt pattern I am happy to get back to you with a list of recommended parts.
Product Page this Question was Asked From
Kodiak Disc Brake Kit - 12" Rotor - 6 on 5-1/2 - Dacromet and Stainless Steel - 6,000 lbs
- Trailer Brakes
- Disc Brakes
- Marine Grade
- 6 on 5-1/2 Inch
- Rotor
- 6000 lbs Axle
- 14-1/2 Inch Wheel
- 15 Inch Wheel
- 16 Inch Wheel
- Kodiak
more information >
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Jesse M.
10/22/2025
Hey Justin, were you able to measure your bearing sizes and hub bolt pattern for the triple-axle trailer? Knowing what you found could really help others trying to match disc brakes for similar setups. Your update could make it easier for the next person with the same question.