Trailers are among thieves ‘ most tempting targets. For trailer drivers or owners, it is a very common fear to leave their trailers unattended. Thus, when one carries a trailer, it is necessary to think about the valuable content to be transported. Luckily, there are trailer locks to prevent the possibility of trailer theft and unauthorized entry into your possessions.

A trailer lock guarantees that a trailer remains where you park it. It serves as a protective border that makes it difficult for anyone to steal your trailer and makes your belongings relatively safer. Similarly, it is one of the most common truck accessories and it will help you carry more things on your truck with security.

Commonly, no lock is 100% unbreakable. But a high-quality one is going to give the thieves a tougher time. And if you still have a dilemma with your trailer when you leave it, our key system specialists have looked at different trailer lock options in the market. With their expertise, we have a look into the details and specifics to help you choose the one that will perfectly fit your security needs.

Here's a detailed look at the best locks for trailers with different features to consider when buying one. Also, get your hands on hot discounts of these items on Amazon by clicking on the buttons below we specifically prepared for you!

Best Trailer Locks Comparison & Rating

Trailer Locks

Features

Master Lock - Universal Size Fits 1-7/8", 2", and 2-5/16" Couplers - Trailer Locks #389DAT
  • universal trailer coupler lock
  • one-piece housing slide
  • works mostly on 1-7/8 in., 2 in., and 2-5/16 in. couplers
Master Lock 2866DAT 1/2 in. and 5/8 in. Swivel Head Receiver Lock for Class I-IV, 1 Pack, Black
  • 1/2 in. trailer hitch locking pin
  • locking head rotates 360 degrees
  • suits 1/2 in. (13 mm) and 5/8 in. (16 mm) receptors
REESE Towpower 72783 Universal Coupler Lock, Adjustable Storage Security, Heavy-Duty Steel
  • heavy steel lock bar
  • features 11 locking positions
  • fitted to 1-7/8 in., 2 in., and 2-5/16 in. coupler
Trimax UMAX100 Premium Universal Dual Purpose Coupler Lock
  • impressive ballistic-grade nylon housing
  • hardened 360-degree steel
  • can match up in couplers from 1-7/8 in.–2-5/15 in
Tow Ready (63228) 'Gorilla Guard' Coupler Lock for 2" Couplers
  • high-duty material
  • push-button lock system
  • fits on coupler sizes of 3–13/16 in. or less in diameter

1. Master Lock 389DAT Trailer Lock

Master Lock - Universal Size Fits 1-7/8", 2", and 2-5/16" Couplers - Trailer Locks #389DAT
Specifications:
98% Overall

Brand

Master Lock

Weight

1.48 pounds

Dimensions

6.5 x 4 x 7.5 inches

Color

Red

98%
materials
97%
fit
98%
features
98%
ease of use
Pros:
  • Heavy-duty trailer lock deters theft by blocking hook-ups and guards from trailer tow-away theft.
  • This universal trailer coupler lock works mostly on 1-⅞ in., 2 in., and 2-5/16 in. couplers.
  • With an advanced locking system that will avoid theft and prying.
  • It comes with a one-piece housing slide that fits snugly around the coupler.
  • Can easily be mounted and easily removed.
  • Keyway feature prevents the lock from moisture and fragments.
  • Large-size and heavyweight guard against breaking or cracking locks.
  • Powder-coated surfaces are resistant to rust and corrosion.
  • Its red color gives a visible deterrent to robbery.
  • 2 included keys.
Cons:
  • If the conditions under which the Master 389DAT Trailer Lock is exposed to too cold weather, it can freeze and make it even harder to open.
Final Take:

Prevent theft and secure your trailer with a Master 389DAT Trailer Lock. Its rugged frame blends right in with several 1-7/8 in. couplers, 2 in. couplers, and 2-5/16 in. couplers. This universal-sized bright red lock trailer boasts a robust built that can securely lock your trailer, and is also visually appealing and looks like a threat to those trying to steal your trailer and its belongings. It is durable, made from corrosion-resistant metal, and ideal for extreme conditions. Its sophisticated security locking system is resistant to lock opening, prying as well as tampering. It is easy to install and, with regards to trailer theft, this is a perfect choice to make.

2. Master Lock 2866DAT Lock

Master Lock 2866DAT 1/2 in. and 5/8 in. Swivel Head Receiver Lock for Class I-IV, 1 Pack, Black
Specifications:
97% Overall

Brand

Master Lock

Weight

1.1 pounds

Dimensions

8.56 x 3.75 x 1.58 inches

Color

Black

97%
materials
97%
fit
96%
features
97%
ease of use
Pros:
  • A 1/2 in. trailer hitch locking pin can securely lock up to 3,500 lbs (Class I and II), while a 5/8 in. trailer hitch locking pin can securely lock up to 10,000 lbs. (Class III and IV).
  • It suits 1/2 in. (13 mm) and 5/8 in. (16 mm) receptors; each chrome hitch pin lock's functional length is 2-3/4 in (70 mm).
  • The locking head rotates 360 degrees, so the keyway faces forward and the locking mechanism is easy to use.
  • The receiver lock features a push-to-lock locking system to ensure that every lock is secured and offers enhanced protection and a theft deterrent when towing.
  • Snap-on covers offer weather resistance to avoid dust and debris from reaching the keyway, a four-pin cylinder for additional protection to avoid lock picking.
  • Two pins with two keys as well as one head locking swivel are included.
Cons:
  • The materials that are welded into Master Lock 2866DAT are not durable enough to significantly resist corrosion for some time. If it is permanently fixed to the hitch, it may undergo severe corrosion. Thus, the chrome plating on the trailer may be corroded, too.
  • Although Master Lock 2866DAT has served its function, it is not something that you want to keep in place for a long period because it can be partially seized up and very tough to unlock.
Final Take:

Master Lock 2866DAT is one of the cheapest trailer lock items available in the market. It's a perfect choice for those who are looking to save a little money while still getting a powerful trailer locker. This trailer lock model features an activated head that can turn 360 degrees so that the keyway can be easily accessed. With the push-lock mechanism, you have a safe and easy-to-use lock. Moreover, there is also a receiver lock that guarantees you an extra level of security and is also helpful protection from thieves. It should be noted, however, that the materials used to create this lock do not appear to be fully resistant to corrosion. But perhaps the snap on the cover will protect the important areas of the lock from the weather, and thus from corrosion, for quite a long time.

3. REESE Towpower 72783 Lock

REESE Towpower 72783 Universal Coupler Lock, Adjustable Storage Security, Heavy-Duty Steel
Specifications:
96% Overall

Brand

Reese

Weight

1 pound

Dimensions

9 x 3 x 9 inches

Color

Yellow

95%
materials
96%
fit
97%
features
96%
ease of use
Pros:
  • It is solid, well-built, and can be fitted to 1-7/8 in., 2 in., and 2-5/16 in. coupler.
  • Extremely flexible, as it features 11 locking positions.
  • Its vivid, highly noticeable yellow color protects from truck and trailer stealing.
  • Its premium lock prevents from picking up, prying, as well as drilling out.
  • This high-quality lock is made from a heavy steel lock bar and an aluminum body.
  • Features an easy-to-mount lock.
Cons:
  • The aluminum body trailer lock is small.
  • REESE Towpower 72783 features a special, tapered lock and thus may be difficult to remove from the coupler. Bear in mind that it is very important to make sure the lock is easy to remove from the coupler for ease of use.
Final Take:

There is nothing much better! With Reese Towpower 72783, you get a high degree of adjustability as it boasts 11 locking positions, thus, giving you an easy time to change for optimal fit. Because of its heavy base and steel bar, cutting would take far more time and effort than any thieves will like to put in. Besides, the base has strong visible yellow labeling which improves visibility when locking, particularly ideal for trailers. It is intended to hinder thieves from stealing your trailer by locking the trailer's coupler and stopping anyone from connecting your trailer to another automobile.

4. Trimax UMAX100 Trailer Lock

Trimax UMAX100 Premium Universal Dual Purpose Coupler Lock
Specifications:
95% Overall

Brand

Trimax

Weight

6 pounds

Dimensions

4 x 9.3 x 8.8 inches

Color

Black

96%
materials
95%
fit
95%
features
95%
ease of use
Pros:
  • Boasts one-size-fits-all functionality which is available in a variety of sizes. It can match up in couplers from 1-7/8 in.–2-5/15 in.
  • Highlights hardened 360-degree steel.
  • Features a keyhole cover that slides up to block out dirt and dust.
  • Made of high-quality materials and comes with an impressive ballistic-grade nylon housing which is resistant to hammer impacts and secures against climate conditions.
  • Integrates a system of dual ratchet lock mechanisms.
  • Rugged, strong, and the key won't break or bend.
  • This lock contains a type A key, which is a spring-loaded, 7 pin, heavily guarded key that can withstand attempts at forced entry.
  • Suitable for outdoors and indoors trailer lock.
Cons:
  • The Trimax UMAX100 Trailer Lock can fit on a few couplers too snugly and it's hard to remove without any special equipment.
  • At 6 pounds, the Trimax UMAX100 Trailer Lock is heavier and more costly than other trailer locks, but it is made with high-quality materials and has some great security features.
Final Take:

Trimax UMAX100 trailer lock is excellent in offering one-size-fits-all features so that it is usable in myriad sizes. A particular size of this model will suit several hitches properly, and if you are concerned about the intrusion and damage of debris as well as other sharp particles to your lock, then it guarantees that the keyhole is installed and has a cover. It has a dual ratchet locking mechanism that can keep your trailer safe even though you're not around to secure it. And with hardened 360-degree steel, there's no risk of a simple lock break. So you're going to love improved security for your trailer.

5. Tow Ready 63228 Coupler Lock

Tow Ready (63228) 'Gorilla Guard' Coupler Lock for 2" Couplers
Specifications:
94% Overall

Brand

Tow Ready

Weight

2.1 pounds

Dimensions

7 x 6 x 3 inches

Color

Black

96%
materials
94%
fit
94%
features
95%
ease of use
Pros:
  • Suitable for connecting 2 in. trailer couplers with a flat edge at the bottom.
  • Fits on coupler sizes of 3–13/16 in. or less in diameter. However, the height of the coupler edge cannot be more than 5/16 in.
  • Its setup suits the ball socket on the trailer, whereas the solid bar encloses the coupler.
  • Built of high-duty material that cannot be tampered with, such as hammering, prying, or picking.
  • No tools are needed to install this lock.
  • Simple to use with a push-button lock system.
Cons:
  • Tow Ready 63228 Coupler Lock is more costly than those on the list, but the quality product sounds worth the extra cost.
  • Accessing the lock beneath the coupler is a bit of a challenge.
Final Take:

The Tow Ready 63228 has been one of the finest trailer coupling locks available in the market. This is largely attributable to its tamper-proof design that requires tampering from any device quite impossibly difficult. With its heavy-duty metal structure, this lock is likewise intended to provide excellent services for several years. Its design suits the ball socket on the trailer, while the solid bar surrounds the coupler, and is compatible with any-2 inch trailer coupler. Further, there seem to be no other tools to install this lock.

Best Trailer Locks - Buyer's Guide

Materials

Take note of the type of material used on the trailer lock. Most are made of solid metal, while some are strengthened with tough steel construction. Whoever tries to rob your trailer would either ensure that this is a much tougher time. Bear in mind that a strongly designed lock resists breakage.

Size

Size is an essential aspect to take into consideration when choosing a trailer lock. Larger locks have better-equipped options than smaller locks. On the other hand, the smaller locks do not fit snugly in couplers. So, choose a lock that will be the right size to match the coupler. This will help tremendously no matter what the weather is.

compatibility

Before you buy a trailer lock, it is important to consider the compatibility of the lock before actually purchasing it. Some of the hitch locks are not compatible with all trailer couplers. Do not forget to check the trailer hitch when purchasing a lock. It's important to make sure you've chosen the correct coupler lock with your trailer. Unsuitable locks increase many frustrations as they can risk trailer security. The excellent thing is that there are now various universal locks that are compatible with.

durability

Trailers hang around outdoors. So it's still possible to experience critical outdoor weather conditions. So, a smart measure to secure it is to lock a trailer with a lock that can withstand harsh weather conditions. Make sure that your trailer lock is made and built with materials that are corrosion and rust-proof so that the quality never sags off as your trailer remains outside for a prolonged duration.

visibility

One of the several safest ways to avoid your trailer from stealing is to ensure that you have a noticeable lock. One good way to prevent thieves is to choose vibrant colors like red or yellow, which are by far the most prevalent colors available in the market.

Best Trailer Locks - FAQs

Can anyone still thieve my trailer even if my trailer already has a lock on it?

Definitely yes because trailer locks cannot 100 percent guarantee that your trailer may not be thieved. Depending on the lock type you choose and the material from which it is made, you will decide how easy it might be to steal on your trailer.

If I lose my key, what do I do?

Almost all of these locks happen to have 2 keys, so you have to use a spare key. However, if you drop all keys, just one option is by having a locksmith create new ones. Another choice is to break the lock itself.

How am I going to unleash the lock?

It depends on what kind of trailer lock you have, it's typically as easy as putting a key as well as turning sideways until you recognize a sharp turn or clicking sound.

Are the trailer locks difficult to install?

It largely depends on which model you have, but it's relatively easy and most of the time it takes just a few minutes.

Author

Santi Bongco is an editor at SolidSmack which is the leading site for 3D CAD, robots, cool product designs, and other technologies. For the past seven years, he taught robotics and developed innovative 3D printer ideas with his students. He also helped in developing some innovative digital ideas and products for various digital marketing businesses and big companies in Asia. Now, aside from exploring buffet restos in California, he enjoys leading groups of our in-house experts in trying some of your favorite products and electronic brands to write insightful reviews for you. PS: He loves reviewing appliances and taking them home to personally ‘try’ them.