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Trimax Dual Purpose Coupler Lock and U-Lock for 1-7/8", 2", and 2-5/16" Couplers

Trimax Dual Purpose Coupler Lock and U-Lock for 1-7/8", 2", and 2-5/16" Couplers

Item # TMX77FR
Retail:$41.99
Our Price: $32.31
Trailer Tongue Lock
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Dual-ratchet locking system and hardened steel shackle provide 360 degrees of protection for your trailer coupler and peace of mind when you leave your trailer unattended. Also works as a general-purpose U-lock. Great Prices for the best trailer tongue lock from Trimax Locks. Trimax Dual Purpose Coupler Lock and U-Lock for 1-7/8", 2", and 2-5/16" Couplers part number TMX77FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (57)
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  • Videos (1)
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Trimax Locks Trailer Tongue Lock - TMX77FR

  • Fits 1-7/8 Inch Ball
  • Fits 2 Inch Ball
  • Fits 2-5/16 Inch Ball
  • Surround Lock
  • Trimax Locks
  • Steel
  • Keyed Unique
  • Universal Application Lock

Dual-ratchet locking system and hardened steel shackle provide 360 degrees of protection for your trailer coupler and peace of mind when you leave your trailer unattended. Also works as a general-purpose U-lock.


Features:

  • Locks down your trailer coupler to prevent towaway theft
    • Keeps others from hooking up to your trailer
    • Fits most ball-style couplers
  • Creates a tight, secure fit around coupler for 360 degrees of protection
    • Built-in ball fits inside coupler, engaging it like a trailer ball does to block the opening
    • Dual-ratchet system allows shackle to clamp around coupler evenly and guards against tampering
  • Doubles as a U-lock so you can secure equipment or lock down your motorcycle's rotor
  • Constructed of die-cast steel
  • Resists rust and corrosion while providing highly visible theft deterrent with red powder coat finish
  • Provides better security than locks with standard keys
    • Cylinder is harder to pick and resists drilling
    • Tube keys are more challenging to duplicate
  • Includes 2 keys
    • Keyhole cover keeps moisture and debris out of lock cylinder


Specs:

  • Application: 1-7/8", 2", and 2-5/16" ball couplers
  • Maximum coupler width: 4"
  • Shackle diameter: 1/2"
  • Limited lifetime warranty


Coupler width

Trailer Security Lock

You can lock your trailer coupler with a padlock, but it might not provide enough security to keep your trailer safe. A padlock can only be used to lock the coupler latch on your coupler, and to fit through the latch, the shackle on it has to be pretty thin. That means the shackle on a padlock is typically easy to cut.


The shackle on this wraparound lock is considerably thicker than a standard padlock shackle, making it harder to cut through. Also, because the shackle on this lock wraps around the head of your coupler instead of just fitting through the tiny latch, it just plain looks more secure.


The built-in ball on this lock engages in your coupler's ball socket, completely blocking the opening to prevent any tampering. The shackle fits over your coupler and ratchets down tightly and evenly. Because it ratchets on both sides, even if someone manages to slice through the shackle, it won't be enough to remove the lock. A (patient) thief would have to cut the thick shackle in multiple places to work it off of your coupler.


Simple Installation

To install this lock on your trailer:


Coupler lock installation

First, remove the shackle from the lock body and insert the built-in ball into your coupler's ball socket.


Coupler lock installation

Then, position the shackle over your coupler and line it up with the holes in the lock body. Push the shackle down, ratcheting it until it's snug around the coupler.


This lock can also be used as a general-purpose U-lock so you can lock down chains, secure doors, and more. To use this as a U-lock, just remove the ball plug plate and set it aside.



UMAX25D Trimax Locks Universal Diecast Patented Dual Locking Narrow Body Red Coupler Lock with 1/2" Steel Shackle





Video of Trimax Dual Purpose Coupler Lock and U-Lock for 1-7/8", 2", and 2-5/16" Couplers

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Trimax Locks Trailer Coupler Locks - Dual Purpose Coupler Lock And U Lock - TMX77FR

Hi, everybody, Andy here with etrailer.com, and today we're gonna take a look at this TRIMAX dual-purpose coupler lock and U-lock. With this universal coupler lock, you're gonna be able to keep your unattended trailer safe from theft. This universal coupler lock is going to fit 1 7/8-inch, two-inch, and 2 5/16-inch ball couplers. I do happen to have a coupler here that fits two-inch balls. I just wanted to show you how easy this is to use. I'm gonna use one of the two included keys that comes with this.

And go ahead and unlock this. I'm gonna pull this shackle out, and then just put this around the coupler. Now, I will go ahead and remove the key here 'cause you do not need the key in the lock to lock this. So I'm gonna go ahead and just go ahead and start pushing the shackle down through the lock. And you can hear that dual-ratchet locking system in action.

Gonna make this as tight as I can, and it looks like we are good to go. So this is gonna provide 360 degrees of protection for your unattended trailer. I mentioned that dual-ratchet locking system. It is theft resistant. And this hardened steel construction with this red finish is corrosion resistant.

So this can also be used with cables and chains for added security. So I'm just gonna go ahead and unlock this, comes off very easily. Then again, I'm just gonna turn my key here and push the shackle back into place, and you can hear that dual-ratchet system again. This features a narrow body with a 1/2-inch hardened steel shackle. And as I mentioned, this does include two rugged tubular keys.

And let me pull out my ruler here and just give you the measurement. In between that shackle, we are sitting right at four inches across to the U-shape locking pin. And this is very rugged, feels very heavy duty. And I think this finish is going to hold up rather well. It doesn't easily flake off. So it's gonna continue to provide that corrosion resistance for a while. This does have a limited lifetime warranty. And if this matches the specifications that you're looking for, I think this is gonna be a great option for you to consider. Well, that's gonna conclude our look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me..

Customer Satisfaction Score:


Customer Reviews

Trimax Dual Purpose Coupler Lock and U-Lock for 1-7/8", 2", and 2-5/16" Couplers - TMX77FR

Average Customer Rating:  4.8 out of 5 stars   (57 Customer Reviews)

Dual-ratchet locking system and hardened steel shackle provide 360 degrees of protection for your trailer coupler and peace of mind when you leave your trailer unattended. Also works as a general-purpose U-lock.

by:

Fits well on my trailer tongue. Easy to lock and unlock.



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When not securing trailer tongue used to secure items in trailer.



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Looks nice



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Fits perfectly



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The overall quality seems excellent! The locks work smoothly and will be perfect for my Ranger trailer and Seadoo trailer. I was also surprised to see both locks were keyed the same. A big plus in this case.



by:

After one year outside in all weathers, the lock still looks and works great.



by:

Best coupler lock in this style. Great value.



by:

I like this coupler lock. I wanted something that would "hopefully" deter people from wanting to "borrow" my trailer. It fits nice and snug!



by:

I’ve got these locks on all my trailers and only had 1 fail in the 15 years I’ve been using them.



by:

USED IT TO REPLACE A REESE HD ONE THAT THE LOCK FAILED THE SECOND TIME USED



by:

Fits very well and should add security



by:

Very good transaction. Needed a lock with a wider opening for the shackle than others.



by:

Awful customer service. Took almost two months for my items to be delivered to my house. Will never buy anything from this website again.



by:

Turning the keys in the lock is a bit sticky right out-of-the-box. The black plastic casing feels very light-weight - will have to see if it can hold up to winters in the Northeast or if it'll crack.


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See what our Experts say about this Trimax Locks Trailer Tongue Lock

  • Maximum Trailer Coupler Width For the Trimax Dual Purpose Coupler Locks
    The 1/2" Trimax Dual Purpose Coupler Lock # TMX77FR measures 4" across to the U-Shaped locking pin. We also have the 9/16" Trimax Dual Purpose Coupler Lock # TMX67FR and Trimax Dual Purpose Coupler Lock with Ballistic Grade Nylon Housing # TMX47FR that are both 4-1/2" across.
    view full answer...
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  • Recommended Surround Coupler Lock That Can be Keyed Alike
    I have an alternative option for you, but the Trimax Dual Purpose Coupler Lock and U-Lock # TMX77FR is only available as a unique keyed option. For a similar style that can be keyed alike I recommend the Fastway Universal Trailer Coupler Lock # FA86-0015-301 instead. This has the same basic design as the one you were looking at but it has a slightly larger shackle at 5/8" diameter plus there is a rubber plug to cover the keyhole and help keep dirt and debris out of it. Attached are some...
    view full answer...
  • Are You Able To Get Replacement Keys For Gorilla Guard Trailer Coupler Lock # 63228?
    We do not carry any replacement keys for the Gorilla Guard Trailer Coupler Lock # 63228 as the manufacturer does not provide these. I recommend replacing your lock with the Trimax Dual Purpose Coupler Lock # TMX77FR. This will allow you to order replacement keys directly from Trimax by simply ordering the key based on the number stamped on the key. This way you could still get a replacement key if you lost both your keys.
    view full answer...
  • Do Trimax Dual Purpose Coupler Locks Use Unique Keys
    The Trimax Dual Purpose Coupler Lock and U-Lock # TMX77FR uses unique keys for the locks. If you were to buy two of these I would expect the keys to be different. If you're looking for a similar lock with a keyed alike option I recommend the Fastway # FA86-0015-316. This also fits 1-7/8", 2" and 2-5/16" ball couplers. You can actually choose the key number, in this case it is 316, so the keys will work with however many you need. If you don't like 316 I have attached a link below which...
    view full answer...


Info for this part was:

Employee Andrew K
Installed by:
Andrew K
Employee Ed W
Installed by:
Ed W
Employee Andy C
Installed by:
Andy C
Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video Edited:
Joshua S
Employee Jonathan Y
Video by:
Jonathan Y
Employee Samuel H
Video by:
Samuel H
Employee Sabrina W
Written by:
Sabrina W

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