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Best Trailer Lock For Gear & Additional Accessories To Transport Safely

A lot of camping trips are impossible without a decent trailer that lets you put a lot of gear and additional accessories and safely transport them from one place to another. But unlike large trailers, you will need small and compact mobile trailers for personal use. And these trailers aren’t that secure and can get stolen easily if proper care is not taken.

There are a lot of cases where mobile trailers have disappeared without a trace. If you want to avoid that, you need to secure your trailer with a decent trailer lock or hitch lock. These locks will prevent unauthorized access to the trailer hitch, thus preventing it to be towed. Here’s what you need to know about a trailer lock before buying one.

  • Material: If there is one factor that can determine the protection level provided by any type of lock, it is its material and overall build quality. If you want the best protection, you should go with a trailer lock made up of a premium material that cannot be broken easily. For that, we have included only those options that are made up of strong metals such as reinforced steel so that you can get the best protection.
  • Size and Fit: There are a lot of different types of hitch designs and sizes available on the market. As a result, the compatible locks are also different based on the coupler dimensions. You will find compatible coupler sizes with all of our picks that will surely make your job easier.
  • Locking Mechanism: If your lock can be easily bypassed using a different type of key or some other instrument, there is no point in using the lock and you might as well keep the trailer parked overnight without a lock. For best protection, you also need to take a look at the locking mechanism of the unit and see if it is a foolproof option or not.

It would not be an exaggeration to say that the market is flooded with various types of locks when it comes to trailer locks or hitch locks. Therefore, finding the best option from all these choices can get difficult. While the factors mentioned above will help you find the right product, you will still have to browse through hundreds of options. If you don’t want the trouble of doing that, you should take a look at our picks for the best trailer locks and find a suitable option right here. We also have a “Buying Guide” to help you pick out the right option under your budget.

Best Trailer Lock List

Trailer LockFitDimensionsBuy Now
REESE Trailer Lock4-1/2 inch9 x 9 x 3 InchesCheck On Amazon
CURT Trailer Lock⅝ Inch8.87 x 1.87 x 1.25 InchesCheck On Amazon
Master Trailer Lock1-⅞ Inches, 2 Inches, and 2-5/16 Inches6.5 x 4 x 7.5 InchesCheck On Amazon
CZC AUTO Trailer Lock¼ Inch, ¾ Inch2.76 x 2.4 x 0.94 InchesCheck On Amazon
Rhino USA Trailer Lock5/8 Inch7.09 x 1.73 x 1.6 inchesCheck On Amazon
Tevlaphee Trailer Lock ---16.38 x 9.25 x 2.83 inchesCheck On Amazon
CZC AUTO Trailer Lock1/4 inch, 2-1/2 Inch‎6.26 x 1.42 x 1.38 inchesCheck On Amazon
Proven Trailer Lock2-5/16 Inch8.1 x 7.8 x 7.5 InchesCheck On Amazon
Funmit Trailer Lock1-⅞ Inches, 2 Inches, and 2-5/16 Inches‎6.38 x 5.79 x 3.31 InchesCheck On Amazon

Best Trailer Lock Reviews

1. REESE Trailer Lock  

REESE Trailer LockREESE Towpower 72783 Coupler Lock is versatile, tough, and easy to use. It is the best way to protect your trailer from thieves. It offers top-notch protection you will not find anywhere else. It is Made from strong aluminum and heavy-duty steel; this coupler lock is like a tough fortress built to handle tough situations. Its strong design does not just make it last a long time, it also keeps determined intruders away, even if they try to pick, pry, or drill it open.

This lock is versatile because it can securely fit couplers of different sizes like 1-⅞”, 2”, and 2-5/16”. With 11 different adjustable positions, it can easily fit many different coupler sizes, making it a great choice for any type of towing setup. Its bright yellow color makes it easy to spot and scares away thieves from your trailer. The bright color says, “Your trailer is well protected!”. Putting it on and taking it off is super easy, making your trailer more secure without any trouble.

Don’t settle for less security when you can have a top-notch coupler lock that keeps your precious cargo safe. Boost your trailer’s security to the highest level with this strong protector always with you.

Best Features:

  • Fits 1-⅞”, 2”, and 2-5/16” couplers.
  • Made from sturdy aluminum and heavy-duty steel.
  • Offers 11 positions for a secure fit.
  • Bright yellow color deters thieves.
  • Hassle-free setup and removal.


  • Provides versatile security for various coupler sizes.
  • Resistant to picking, prying, and drill-outs.
  • Highly visible deterrent to theft.
  • Simple to install and remove.
  • Durable construction ensures longevity.


  • Bright color might fade over time with exposure to the elements.
  • Some users may find it slightly bulkier than other locks.
  • May not fit all coupler types, so check compatibility before purchase.

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2. CURT Trailer Lock

CURT 5.8-Inch Pin Trailer LockWhen it comes to buying accessories regarding safety and security of your property, you should always trust options from brands that tens of thousands of users are choosing. CURT is one such brand for trailer locks and many other essential trailer accessories.

CURT 23518 Black Trailer Hitch Lock is the 1st option that we have for you today, and it is the most popular one compared to all other trailer locks on the market. This lock is designed for ⅝ inch trailer couplings and is quite a smaller option compared to others. Therefore, it is very easy to install and use on a daily basis. You can use the CURT 23518 Black Trailer Hitch Lock for most 2 inch receivers without any issues.

Opening and locking the CURT 23518 Black Trailer Hitch Lock is also quite fast as the keys that come with the lock work on a ¼-turn lock system. And with the 2.85 inches pin length, it is completely unbreakable from outside. Still, the overall dimensions of the CURT 23518 Black Trailer Hitch Lock are about 8.87 x 1.87 x 1.25 Inches, making it almost invisible from outside.

Best Features

  • Suitable for ⅝ inch coupling size
  • Measures about 8.87 x 1.87 x 1.25 Inches in size
  • 85 inches pin length
  • Operated on a ¼-turn lock system


  • Most popular choice on this list
  • Easy to and quick to operate
  • Preferred choice of thousands of buyers


  • Not the best option for long distance trips

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3. Master Trailer Lock

Master Lock Universal Size Fits Trailer LockCompatibility is usually a determining factor for a trailer lock and a lot of good options don’t offer universal compatibility. However, the following option from Master Lock is definitely an exception and works out the best in every case.

In 2nd place, we are putting the Master Lock 389DAT on our list. This lock is one of the many locks designed by the brand and fits almost all coupler sizes such as 1-⅞ Inches, 2 Inches, and 2-5/16 Inches. It is also a relatively smaller option as it measures about ‎6.5 x 4 x 7.5 Inches in size and has a smaller locking system.

However, the bright red color of the lock is quite apparent to an outsider and indicates that the trailer is out of reach. The outer coating of the Master Lock 389DAT offers a decent protection against rust or other environmental problems. As for the installation and ease of use, the Master Lock 389DAT is very easy to install and suitable for regular usage.

Best Features

  • Suitable for 1-⅞ Inches, 2 Inches, and 2-5/16 Inches coupling size
  • Measures about ‎6.5 x 4 x 7.5 Inches in size
  • Advanced locking mechanism
  • Decent weather protection


  • One of the popular trailer locks from this list
  • Smaller option compared to others
  • Universally compatible with most trailer lock couplings


  • Not as reliable as a few other choices

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4. CZC AUTO Trailer Lock

CZC AUTO Trailer LockIf you already store your trailer inside a safe parking lot or a garage, you probably need a basic and affordable lock just to keep it in its place. For that, we have just the right option from CZC AUTO.

If you are looking for the cheapest option that you can buy for a reliable trailer lock, look no further. The CZC AUTO Trailer Hitch Coupler is the perfect option for you. The CZC AUTO Trailer Hitch Coupler is the most affordable option that we have today and works perfectly for basic applications. It uses a locking pin mechanism and is compatible with  ¼ Inch and ¾ Inch coupling sizes. And as for the lock itself, it measures about 2.76 x 2.4 x 0.94 Inches, making it easy to keep with you in your pocket.

Even though it is the cheapest option on our list, it still features high-strength steel construction that makes it safe from all forms of external damage. You will also notice electrophoretic paint on the surface of the CZC AUTO Trailer Hitch Coupler to keep it safe from rust and corrosion. CZC AUTO is also offering a 30-day money-back guarantee on the lock and a year of warranty if you face any problem with the lock.

Best Features

  • Suitable for ¼ Inch, ¾ Inch coupling size
  • Measures about 2.76 x 2.4 x 0.94 Inches in size
  • Made up of high-strength steel
  • Coated with black electrophoretic paint


  • Backed by a year of warranty
  • Small and compact unit which can be carried in a pocket
  • Most affordable option on this list


  • Locking and unlocking takes a lot of time

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5. Rhino USA Trailer Lock  

Rhino USA Trailer LockRhino USA Trailer Hitch Lock is a tough defender that always keeps your trailer safe from being stolen. This tough lock is very strong and can handle any weather, so it is the best choice for keeping your things safe. This lock is built with super strong steel, and it lasts a long time because it’s very strong. This lock has special design with a smart weatherproof cover. This amazing new feature acts like a super strong shield, protecting your lock from getting dirty or damaged by dirt and mud. This trailer hitch lock stays strong and keeps working well, ensuring it lasts a long time and works smoothly.

The Rhino USA Trailer Hitch Lock is like the strongest defender in the fight against trailer theft. You can trust Rhino USA completely because they don’t take any chances when it comes to making your trailer secure. 

Best Features:

  • Heavy-duty and weatherproof.
  • Fits Class III and IV hitches (2″ x 2″).
  • Solid forged steel construction.
  • Innovative weatherproof slide cap design.
  • Family-owned business with a satisfaction guarantee.


  • Exceptionally strong and durable.
  • Weather-resistant for long-lasting use.
  • Universal fit for most hitches.
  • Innovative design protects against dirt and mud.
  • Backed by a customer-focused family-owned company.


  • May be relatively more expensive than basic hitch locks.
  • Some users may find it slightly heavy at 14.9 ounces.

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6. Tevlaphee Trailer Lock   

Tevlaphee Trailer Lock   The Tevlaphee Universal Wheel Lock is the best way to protect your vehicle from being stolen. This wheel lock is super tough and will keep your vehicle safe. The unique crescent-shaped lock on this wheel lock makes it very difficult for thieves to steal your belongings. It is like an unbeatable shield.

We designed this security device carefully to keep your precious vehicle safe and sound. The clamp’s surface has a protective coating that acts like a guardian for your car wheel, keeping it safe from harm. These colors make sure it’s easy to notice both during the day and at night, making potential thieves think twice about their actions.

This vehicle protector is very versatile; it can easily fit tires that are 7 to 11 inches wide without any trouble. If you have a car, camper, truck, motorcycle, or any vehicle with wheels, this wheel lock keeps them all safe and secure. At Tevlaphee, we are completely dedicated to keeping your vehicle safe. Our Universal Wheel Lock is the best choice for reliable, versatile, and noticeable protection.

Best Features:

  • Made from strong steel for durability.
  • CInnovative design for enhanced security.
  • Guards your wheel against damage.
  • Bright yellow and red colors deter thieves.
  • Fits a wide range of vehicle tire widths (7-11 inches).
  • Three keys provided for convenience.


  • Exceptional theft deterrence.
  • Durability and strength.
  • Protects your vehicle’s wheel.
  • Easy to spot with vibrant colors.
  • Accommodates various vehicle types.
  • Keys included for peace of mind.


  • May require some effort to install.
  • Bulkier compared to some other locks.
  • Bright colors might fade over time with exposure to the elements.

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7. CZC AUTO Trailer Lock  

CZC AUTO Trailer LockThe CZC AUTO Trailer Coupler Lock is the ultimate choice for keeping your trailers safe and secure. It provides a strong and reliable way to protect your valuable trailers, ensuring they stay safe during your travels. This strong lock has a thick 1/4-inch pin that is 2-1/2 inches long. It is designed to work with the couplers found on boats, trucks, RVs, and cars.

It is Made from strong steel, this coupler lock is tough and designed to handle rough conditions on the road. It is coated with strong black paint that not only looks good but also protects against theft and rust. This ensures your valuable investment stays safe for a long time.

Using this is easy. This has two keys, so you always have a spare on hand when you need it. It comes with 12 months warranty. It is a symbol of security, a strong protector, and proof of our dedication to making sure you’re happy.

Best Features:

  • Made of sturdy steel for durability and security.
  • Offers rust resistance and a sleek appearance.
  • Fits latch-type couplers on various vehicles, including boats, trucks, RVs, and cars.
  • Provides convenience and a spare in case of loss.
  • Offers a risk-free trial for 30 days.
  • Demonstrates confidence in product quality and performance.


  • Effective theft deterrent.
  • Easy to use and install.
  • Versatile and compatible with multiple vehicles.
  • Comes with a spare key.
  • Backed by a satisfaction guarantee and warranty.
  • Durable construction for long-term use.


  • May not fit certain coupler types (check compatibility).
  • Limited effectiveness against determined thieves.
  • Paint may wear over time with heavy use.

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8. Proven Trailer Lock

Proven Trailer LockIf you usually travel around at long distances and find yourself parking your trailer at unknown locations, you should not compromise on the safety and security of your trailer lock. And for that, you should trust the locking mechanism and design of the Proven Industries locks.

The Proven Industries is also a well-known brand in the trailer and wheel lock industry. And, the Proven Industries 2516 Trailer Lock is one of the most popular choices that they offer among many other choices for a trailer lock. This lock is designed to suit 2-5/16 inches couplers without any problem. The internal locking parts of the Proven Industries 2516 Trailer Lock are made up of hardened steel. So, the strength and reliability of the lock is not to be questioned.

With that being, you should also note that the installation and locking procedure of the Proven Industries 2516 Trailer Lock is a bit difficult and takes some time to get used to. But, it is a fair trade considering you get unbeatable protection with this lock. The special key design of the Proven Industries 2516 Trailer Lock also makes it impossible to pick the lock. The Proven Industries 2516 Trailer Lock works on an exclusive locking mechanism designed for S-hook style safety chains.

Best Features

  • Suitable for 2-5/16 Inch coupling size
  • Measures about 8.1 x 7.8 x 7.5 Inches in size
  • Unique key design
  • Patented locking mechanism


  • Most secured option for locking a trailer
  • Heavy-duty option that offers the best protection
  • Strong outer shield


  • Very expensive choice compared to other options

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9. Funmit Trailer Lock

Funmit Trailer LockCOming back to budget options that are suitable for regular use, we have the Funmit Trailer Lock that can be perfect for regular use. Funmit also designs many other essential accessories like filters, dryers, and their accessories

The Funmit Universal Coupler Ball Lock is also a budget option from our list and is suitable for a wide range of trailer couplers as it is compatible with 1-⅞ Inches, 2 Inches, and 2-5/16 Inches coupling sizes. You can also adjust the ratchet into 11 different locking positions to get the perfect fit according to your needs. As for the material quality, the Funmit Universal Coupler Ball Lock is made up of heavy-duty A36 steel and aluminum.

Thus, the Funmit Universal Coupler Ball Lock easily passes the QC product standard and is certified for the same. The U-shape design of the lock also makes it almost impossible to pry open the lock with brute force. Funmit is also offering a 90-day return period for the lock if you find the product defective or incompatible with your trailer.

Best Features

  • Suitable for 1-⅞ Inches, 2 Inches, and 2-5/16 Inches coupling size
  • Measures about ‎6.38 x 5.79 x 3.31 Inches in size
  • Comes with a 90-day warranty period
  • Easy to install and remove


  • Made up of A36 steel and aluminum
  • Certified by QC product standard
  • Can be adjusted into 11 locking position


  • Warranty period is very short

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Buying Guide For The Best Trailer Lock

FInding the best trailer lock is important if you want to keep your trailer safe and secure on a long trip. And for that, you need to carefully check which lock you are buying and what it offers in terms of features and specifications such as build quality, locking mechanism, weather protection, etc. On this list, you will find the best options available out there for a trailer lock that are carefully picked based on these factors.

But to find the one option that checks out all of the boxes in your case, you should take a look at our buying guide for the best trailer lock before making a choice. In this guide, we will discuss some important characteristics of a trailer lock and help you find out the best option based on your needs. We can assure you that you can find the perfect trailer lock under your budget once you take a glance at this buying guide.

1. Construction and Build Quality

The material used for the lock determines the overall build quality and reliability of the application. If the lock is made up of cheaper and low-quality material to maintain lower production costs, it won’t offer guaranteed protection against theft since it can be easily broken with a single pry tool, thus leaving your trailer unprotected for the time being.

Therefore, you should always consider buying a premium quality trailer lock since the lock is basically protecting the trailer which is much more expensive and could not be replaced easily. As for the build quality, you should always prefer options made up of strong metals such as stainless steel. And if you are looking for a budget option, you can go with a zinc option too since it is also quite a reliable choice.

2. Weather Protection

The trailer locks also go through a lot of wear and tear throughout the year. And on top of that, there are weather issues since the locks will be applied for weeks at a time, under strong sunlight, devastating winters, or even heavy rainfall. Therefore, these locks should have appropriate weather resistance ratings so that they won’t lose quality and durability over time. Low-quality trailer locks do not offer adequate anti-rust capabilities.

And once they come in contact with water or even the normal amount of moisture in the air, they start to rust. Slowly, the rust layer increases and weakens the surface of the lock, making it much easier to break. So, it is important to choose an option that can stay strong and avoid problems like rust or corrosion for a long time. A decent trailer lock with guaranteed weather protection is definitely a worthy purchase.

3. Ease of Use

Another factor that makes a lot of sense is the ease of usage. If your trailer lock is a hassle to install and use every time you wish to lock the trailer, it won’t be an ideal choice, especially if you are going to have to use the lock every other week or so. Therefore, it is always worth checking out the direction of usage before you purchase the lock. This will give you an idea about how the lock is supposed to be used and you can get an idea about its ease of usage.

While you are at it, make sure you also check the fit and compatibility of the unit. It can be very difficult to use the lock properly if it is not supposed to be compatible with the coupler size of your trailer. Another faulty way to check the ease of use offered by the lock is by referring to the reviews left by existing customers. Here, you will find impartial feedback for the unit that will surely help you decide if the lock is the right one for you or not.

4. Locking Mechanism

Lastly, we will recommend you check the locking mechanism since it also affects the security level offered by the lock. Most of the time, the lock itself is highly durable and can sustain lots of external damage. But due to flaws in the locking mechanism, it can be easily bypassed and grants access to unauthorized users, allowing them to tow your trailer.

The market is currently flooded with such locks that offer a subpar locking mechanism design and you need to stay away from such options if you want the best protection for your trailer. But, you can easily avoid that by checking the design of the lock and checking its locking mechanism. Your best bet would be to choose the one that has durable ball bearings and other locking parts. Such locks cannot be easily pried and a supposed thief will give up long before they can come close to breaking such locks.

Frequently Asked Questions

1. Do you need a trailer lock?

Ans: If you usually go out on a long-distance trip where you would have to park your trailer at unknown locations, yes. You definitely need to carry a strong and durable trailer lock wherever you go. Apart from offering foolproof protection to your trailer, it also discourages anyone who can have a second thoughts about stealing your trailer when you are not around. And most of these trailer locks are quite hard to get rid of without the key. So, these locks will surely give you peace of mind when you are not around the trailer.

2. How to install a trailer lock?

Ans: The installation and usage of a trailer lock depend upon the type of lock you are buying as well as its locking mechanism. Therefore, you should always check the manufacturer’s guidelines before you install the lock for assured protection. You can also find video tutorials from the manufacturer that further saves the trouble of reading and understanding a complicated guide. Generally, the trailer locks are installed where the ball of the vehicle’s hitch goes. Once you align it correctly, lock it in place so it cannot be moved or towed.

3. Which type of trailer lock is best?

Ans: The best type of trailer lock for your application depends upon the level of security you need and how much time you are willing to put in while locking and unlocking the trailer. In most cases, using a hitch pin trailer lock is the best idea as it is quick and easy to use such a lock. However, the protection levels aren’t that high with a hitch pin. For added security, you can go with a right-angle lock. Such locks are ideal if you are planning to keep the trailer locked for a couple of days at a time.


We hope that you have managed to pinpoint the best trailer lock to guarantee the safety and protection of your trailer after going through our list of the best options here. As have briefly explained all of our picks in detail, you can easily find out the perfect option that suits your needs the best and offers you an adequate level of security suitable for your trailer. You can also take a look at our buying guide for the best trailer locks as we have some more information there that can prove helpful to you while you are making a choice. In the end, we will leave you with some handpicked recommendations from this list so that you can quickly get a trailer lock right away.

  • If you already have a safe place to park your trailer and need a basic lock to keep it in its place, we will suggest going with a basic option such as the CZC AUTO Trailer Lock. This lock is designed for ¼ and ¾ inch couplers and offers pretty good security for its price. And with the minimalistic design, using the lock is also pretty easy. However, it is still made up of high-strength steel to avoid external damage.
  • On the other hand, if you travel to distant locations quite often and are constantly worried about the safety of your trailer, you should protect it with the Proven Trailer Lock. This is arguably the strongest and most reliable option that we have on this list today. Designed for the 2-5/16 inches coupler size, this lock works out perfectly for all instances. All of the internal locking parts of the Proven Industries 2516 Trailer Lock are made up of hardened steel covered inside a tough exterior cover.
  • Lastly, we will suggest the CURT Trailer Lock since thousands of trailer owners are also using the same without any problem. This is the most popular option available on our list which is designed for ⅝ inch couplers. It also features a high-strength steel construction to avoid damage caused by any form of external impact. And compared to other options, the CURT 23518 Black Trailer Hitch Lock is quite small and measures only 8.87 x 1.87 x 1.25 Inches, almost invisible from the outside.

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