The Best Boat Trailer Locks for 2022

Nicholas Swartz
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Your boat has everything you need to have truly great time on the water. The only thing missing is a good boat trailer. It’s tempting to go cheap on the trailer but they can be pricey. The right trailer can make your boating easier and more fun.

Yes, a lot of them are expensive but they can also be worth the price.

But how will you know?

You could learn everything about trailers yourself but that would take a lot of time and effort. A lot of that time and effort could be better spent doing something else.

You want to get out there on the water but you don’t want to be researching boat trailer locks all night.

That’s where we come in.

Trimax TCL65 Wheel Chock LockBest OverallTrimax TCL65 Wheel Chock Lock
Shoreline Marine Trailer Coupler LockBudget PickShoreline Marine Trailer Coupler Lock
Proven Industries Lock Model #2178Upgrade PickProven Industries Lock Model #2178

1. Trimax TCL65 Wheel Chock Lock

Our rating: 9 / 10

Trimax TCL65 Wheel Chock Lock

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  • Can be permanently mounted to wheel chocks, making it very convenient to use if on a trip boat
  • Easy to install
  • Casters can be repositioned for convenience
  • Simple yet convenient design
  • Extremely practical
  • Great price

The Trimax TCL65 Wheel Chock Lock and Casters kit is a convenient device to use on boats, trailers, and other vehicles. The device allows you to lock the tow hitch to the wheel chocks.

This way, you can protect your boat from theft, but also from stormy weather that may cause a serious wave that may loosen the chocks.

The product comes with a lock and two locks. It is easy to install and reposition the casters. Plus, it’s fairly inexpensive.

2. Master Lock 377KA Trailer Hitch Lock

Our rating: 9 / 10

Master Lock 377KA Trailer Hitch Lock

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  • It’s low to the ground
  • Solid construction
  • Comes with a 2-year limited warranty


  • The extension bars are a little weak
  • It’s somewhat easy to break in if you have the right tools

Are you looking for a good trailer hitch lock for your trailer? If so, the Master Lock 377KA could be the one for you. The features of the Master Lock are numerous.

First, we like the sleek stylish design which blends in perfectly with your vehicle. A cleverly designed lock cylinder prevents someone from picking it.

The 375KA uses a standard 2-inch trailer ball, and it comes with security brackets and two locking bars. The bars use a crossing bar design that’s much stronger than your typical bar and pin.

3. AMPLOCK U-TLS2 : 2'' Boat Trailer Lock/Trailer Coupler Lock/RV Lock

Our rating: 9 / 10

AMPLOCK U-TLS2 : 2'' Boat Trailer Lock/Trailer Coupler Lock/RV Lock

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A very unique and unique looking lock to secure your trailers and vehicles, it’s worth the money you’ll pay for it. The AMPLOCK brand is surely one of the best brands out in the market that you can have, you can rely on their products!

The 2-inch AMPLOCK U-TLS2 is a 2-in-1 secure locking device. It’s a trailer lock and RV lock in one lock, and a trailer coupler lock on its own. It even comes with a free mounting kit for the trailer. You can lock and release the trailer without the need to unlock it first.

The lock is made with solid steel and engineered with just the right size for trucks, trailers and campers. It’s made to work on couplers between 2 to 5 inches.

4. Master Lock

Our rating: 9 / 10

Master Lock

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(includes 2 Keys)

The Master Lock 389DAT is a universal size lock, which means it fits any standard 1-7/8", 2", or 2-5/16" couplers. It comes with two keys and requires no assembly.

This lock is really easy to install. You just clip it onto the bars, and your locks are now secure. It's that simple.

5. Shoreline Marine Trailer Coupler Lock

Our rating: 8 / 10

Shoreline Marine Trailer Coupler Lock

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  • Easy access to your trailer when you arrive at your destination
  • Reasonably priced
  • Security for your boat trailer
  • Easy to install without any tools

The Shoreline Marine Trailer Coupler Lock-Keyed Alike, 3 Padlocks is a set of three locks that is designed for securing your trailer from theft. Its simple design makes securing your boat trailer extremely fast and easy. Not only does it work for boat trailers, but also for campers and car trailers.

6. Proven Industries Lock Model #2178

Our rating: 8 / 10

Proven Industries Lock Model #2178

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  • Protect your valuable boat, boat trailer, truck and camper from theft with Proven Industries ultra-strong coupler lock.
  • Just like a car and regular padlock, the lock is keyed to the one key.
  • With this Proven Industries trailer hitch lock, you do not need an additional key to remove your trailer – it’s all packaged into one convenient lock!
  • This lock is a great choice for keeping your boat, boat trailer, truck, or camper safe because it keeps the thieves from pulling your trailer full of valuables! An additional benefit of using this coupler lock is that it helps deter theft of your vehicle while it’s parked.
  • This is the perfect lock for anyone with a travel trailer, camper, boat, or tailgate that is NOT a 2” coupler.

Available at the best price ever!

DO NOT secure the lock itself with zip ties or string. This will weaken the threads & coating

Do Not Over Tighten Lock, this will weaken the lock and it may compromise its effectiveness.

7. Goplus Heavy Duty Trailer Lock Wheel Clamp

Our rating: 8 / 10

Goplus Heavy Duty Trailer Lock Wheel Clamp

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  • Easy to install
  • Waterproof
  • Fits a wide range of tires
  • Comes with a three-keyed remote

If you are looking for a versatile clamp on wheel lock, then you should consider the Goplus. With this product you can secure different types of trailers. All you have to do is to adjust the steel cable which is only 0.4 inch diameter. The prime purpose of this clamp is to prevent theft of your trailer. All you have to do is clamp this lock around one wheel and you can be sure that your trailer won’t go anywhere.

This product works well because it doesn’t require any tools for its installation. If you want to secure an implement to your trailer, it would be more convenient to use this type of clamp than to have to look for long bolts and nuts.

It may not be very convenient for smaller trailers or axle but it is ideal for larger ones. It is heavy-duty and durable. It is made of steel and injection processed PP plastic. The clamp is stable with its big dash-board but is portable as it is portable at only 13.9 lbs with all the accessories included.

8. REESE Towpower 72783 Universal Coupler Lock

Our rating: 8 / 10

REESE Towpower 72783 Universal Coupler Lock

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  • Compatible with most coupler hitches
  • Conveniently adjustable
  • Secures the trailer to the hitch

If you are looking for the best boat trailer lock of 2020, then the REESE Towpower 72783 Universal Coupler Lock, Adjustable Storage Security, Heavy-Duty Steel, Yellow and Chrome may be the one for you.

This product is versatile because it can be transferred to another trailer in the future. It has a heavy-duty steel construction and is made in the USA.

The lock is very easy to use. It can be quickly adjusted for different couplers. It is good for 1-7/8″ to 2-1/8″ couplers.

9. Master Lock –

Our rating: 8 / 10

Master Lock -

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10. Master Lock

Our rating: 6 / 10

Master Lock

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  • Three pin locks
  • Strong; can support a lot of weight
  • Compatible with most couplers
  • Upgrades easily
  • Lockable
  • Affordable
  • Well made
  • Easy to install
  • Brass parts
  • Available in multiple colors


  • May require some modifications to fit in specific applications
  • Not perfectly designed for every application

The Master Lock Trailer Lock is a 3-pin lock made of brass. The long-shackle lock head covers the coupler latch pin holes. It can withstand up to 20 tons of weight.

It fits a variety of coupling applications and protects against tampering.

It is a solid, quality lock that offers great value for money. It is a locking pin lock and its overall strength is good. This lock is great for those who are starting out with storing trailers or boats and are not looking to spend a fortune to do so.

Frequently Asked Questions (FAQ)

What is the best boat trailer lock?

A boat trailer is an excellent investment. It allows you to easily transport your boat and, while you are storing your boat, it can prevent theft. In fact, some boating communities will not allow you to dock your boat if you do not have a trailer.

It is just as easy for a thief to steal the trailer as it is for them to steal your boat. Some thieves will even target the trailer just to see if there is a boat stored on it.

A good lock is the only way to ensure that your trailer is safe. Depending on where you are storing or leaving your trailer, it might be important to purchase a heavy-duty lock.

It is important that you take the security of your trailer seriously. a theft is an expensive mistake. In many cases, it is better to purchase a slightly more expensive lock and make sure it is secure than to save a few bucks on a cheap lock and risk losing your boat.

What is the best lock for a trailer?

Boat trailers have varying security ratings. The higher the security, the better the lock. If you can, make sure you purchase a trailer whose security matches your preferred level of security on the lock you plan to use.

How do I keep my trailer from being stolen?

Many trailer owners don’t completely secure their trailers and end up with a theft that can be avoided.

The most common issue is that trailer owners do not always lock their pinboxes. This leaves the door to the pinbox wide open for anyone to unlock and steal the trailer’s personal property.

Second, many trailer owners forget to lock both of the trailer’s T-handles. A thief can simply pry the handles open, push the door forward, and take what they want. If the trailer is parked in a parking lot or behind a store, this is a common way that trailer robbers gain access to the trailer.

Last, many trailer owners do not lock down their trailers. This is a simple thing to do. If you lock down your trailer, it is going to be a lot more difficult for thieves to move the trailer and get it out of sight.

Should my boat trailer be level when towing?

Your boat hitch height is important. It can affect your towing experience and your safety. A leveling kit is a good addition to a spare tire at the rear of your vehicle. It keeps your boat on the ball, improving your towing experience.

On a more fundamental level, having the ball high off of the ground can help if something goes wrong. The hitch height of a trailer should be high enough for the boat to suspend in the air for a few feet when the hitch lever is disengaged.

That way, if the bike falls over and the trailer tilts onto its side, the boat will stay level and wonʼt fall completely off the trailer.


The surge in the number of thefts and trailers being stolen in the last few years compelled boat owners to buy a strong and secure hitch lock to restrain their boats. These locks keep your boat safe and prevent it from being stolen from your vehicle. The market is flooded with various types of boat trailer locks and it is a fact that you will spend a lot of time looking for the best one and then still not end up with a product of top quality.

Our Recommendation

Trimax TCL65 Wheel Chock LockBest OverallTrimax TCL65 Wheel Chock Lock
Shoreline Marine Trailer Coupler LockBudget PickShoreline Marine Trailer Coupler Lock
Proven Industries Lock Model #2178Upgrade PickProven Industries Lock Model #2178