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Coupler Lock Recommendation for a Boat Trailer  

Updated 01/12/2026 | Published 08/27/2024

Question:

Trailer lock for my boat Trailer.

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Expert Reply:

Hey Anthony!

I really like the Trimax Dual Purpose Coupler Lock and U-Lock for 1-7/8", 2", and 2-5/16" Couplers # TMX67FR because it can fit a variety of coupler styles and sies, plus it has the matte-looking finish on it which makes it look more intimidating than other coupler locks with this same style.

While we all know that looks aren't everything, if the trailer next to yours has a weaker looking lock then odds are a would-be thief is going after that trailer first.

expert reply by:
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Jon G
Robin H. profile picture
Etrailer Expert

Robin H.

1/12/2026

Hey Anthony, how did the Trimax coupler lock work out on your boat trailer? Did it give you the secure fit and peace of mind you were looking for? Your feedback could help others choosing a lock for their trailers.

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