Adding Brakes to Boat Trailer With 4 Bolt Brake Flange
Updated 08/07/2025 | Published 06/30/2025
Products Featured in This Question
Question:
I have a 30 or old single axle boat trailer with 14 rim but no brakes. Is there an assembly that I can add brakes to it. it has a 4 hole plate on the inside of the spindle. Mark
asked by: Mark B
Expert Reply:
Hi Mark; do you know your axle capacity and who made the axle? More than likely it is a standard 3,500 lb axle but there are some variations that could be hard to find parts for. If it is a 3,500 lb axle and the brake flange matches the measurements below you can use the Dexter Nev-R-Adjust Electric Trailer Brakes # 23-468-469 you were looking at or the etrailer # AKEBRK-35-SA. You will also need the Trailer Hub and Drum Assembly for 3.5K Axles # AKHD-545-35-EZ-K which fits #84 spindles.
If you have a different capacity or measurements let me know in the comments below and I'll see what is available.
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Product Page this Question was Asked From
Dexter Nev-R-Adjust Electric Trailer Brakes - 10" - Left/Right Hand Assemblies - 3.5K
- Trailer Brakes
- Electric Drum Brakes
- Standard Grade
- Self Adjust
- 10 x 2-1/4 Inch Drum
- 3500 lbs Axle
- 14 Inch Wheel
- 14-1/2 Inch Wheel
- 15 Inch Wheel
- Dexter
more information >
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Robin H.
8/7/2025
Hey Mark, did you find out the axle capacity and manufacturer for your boat trailer? I'm curious if the Dexter Nev-R-Adjust Electric Trailer Brakes or the etrailer brakes worked out for you. Let me know how it went, as I'm eager to assist others in similar situations!