Coupler Lock for 2003 Wells Cargo Trailer

Updated 01/20/2026 | Published 01/18/2026

Products Featured in This Question

Trimax Trailer Coupler Latch or Door Lock - Trigger Latch Style - 1/4" Pin Diameter - Chrome

(14)

$18.56

Trimax Universal Trailer Coupler Lock for 1-7/8", 2", and 2-5/16" Couplers

(116)

$78.25

Question:

Just purchased a 2003 Wells Cargo 24foot enclosed trailer. Im looking to purchase a hitch lock for it but having a hard time finding one compatable for this model. 2 5/16inch ball and appears to be very heavy duty. What are some key words, style, or model i need to search for? Picture attached

asked by: Jason

Coupler
(click to enlarge)

Expert Reply:

Hey Jason! The easiest option would be to use the Trimax Trailer Coupler Latch or Door Lock # TMX26SR. You will run this lock through the hole in the trigger latch to keep it secure. You can also use a lock like the Trimax Universal Trailer Coupler Lock # TMX47FR which will fit that 2-5/16" coupler. If you want to look around for others you can search for trigger latch locks or 2-5/16" coupler locks and you will see some other styles/options.

What do you plan to hall with your Wells Cargo trailer?

expert reply by: Robin H

Trimax Lock
(click to enlarge)

Jason

1/19/2026

Thank you for the response Robin. I was actually referring to the coipler type. I've been considering Proven Industries coupler locks but the rolled lip may seem to limit what may fit.

Robin H.

1/19/2026

@Jason yeah that is an older style, and I wouldn't be comfortable recommending one that goes over the lip because of the way it is turned up. More than likely a standard coupler lock that fits over a lip like wouldn't work with your particular coupler. Proven Industries locks look a little different, and that's not a brand we carry or I'm familiar with. I would send the picture off to them directly and see what they have to say if you want to use their locks.

Brian P.

1/20/2026

I’m happy with the coupler lock I bought here. It’s easy to use and should work on any coupler lock.

Stevek

1/20/2026

I went with the Trimax Trailer Coupler Latch or Door Lock # TMX26SR. Watched a few videos and purchased a couple different ones and this seemed the best. What I did do is add a few small washers to take up the space so that the bar going through the hole in the trigger latch was not visible. Not visible means it would be harder to cut through. I use it when the trailer is connected to my truck. I also have this ML389DAT I use this one when the trailer is sitting in the yard