There’s nothing more frustrating than arriving at your trailer, only to worry if it’s safe from theft. You lock it up, but doubts linger will that lock hold?
Choosing the right trailer lock for your Bulldog hitch changes everything. It gives you peace of mind and lets you focus on your journey, not on what might happen to your trailer. A strong, reliable lock keeps your trailer secure, rain or shine, wherever you park it.
In this article, we’ll look at some of the best trailer locks designed specifically for Bulldog hitches. These locks make protecting your trailer simple and stress-free. Keep reading to find the perfect lock that fits your needs and keeps your gear safe every time.
Universal Trailer Lock

The New-Universal Trailer Lock is ideal for RV owners, trailer users, and flatbed haulers who want to secure their trailers against theft. This lock is perfect for anyone needing a reliable and versatile security solution compatible with multiple coupler sizes, including 1-7/8″, 2″, and 2-5/16″ Bulldog couplers.
Pros:
- Anti-theft steel construction ensures maximum durability and protection.
- Fully enclosed design prevents tampering and weather damage.
- Compatible with a wide range of coupler sizes (1-7/8″, 2″, 2-5/16″).
- Bright red color increases visibility for added security awareness.
- Patent pending design highlights innovation and uniqueness.
Cons:
- May require careful fitting to ensure compatibility with some couplers.
- Lock mechanism might need occasional lubrication for smooth operation.
The New-Universal Trailer Lock by AUREOASIS offers a robust and effective way to secure trailers. Made from strong steel and featuring a fully enclosed design, it protects the trailer coupler from theft attempts and environmental damage. The universal fit accommodates several popular coupler sizes, making it a versatile choice for various trailer types.
In addition to its practical security benefits, the lock’s bright red finish enhances visibility, serving as a deterrent to potential thieves. Its patent-pending design reflects thoughtful engineering aimed at delivering maximum protection with ease of use, making it an excellent investment for anyone looking to safeguard their RV, trailer, or flatbed.
Vevor Trailer Lock

The VEVOR Trailer Lock is perfect for individuals who own RVs, trailers, or boats and are looking to enhance their security. If you frequently park your trailer in public or unattended areas, this heavy-duty hitch lock is designed to provide peace of mind by preventing theft and unauthorized access. Ideal customers include RV owners, boat enthusiasts, and trailer users who need a reliable and corrosion-resistant locking solution.
Pros:
- Fits both 2 & 2-5/16-inch Bulldog trailer couplers, offering versatile compatibility.
- Comes with 3 keys for convenience and backup.
- Heavy-duty construction ensures durability and long-lasting security.
- Corrosion-resistant design makes it suitable for outdoor and marine environments.
- Effectively secures security chains to prevent trailer theft.
Cons:
- Relatively heavy weight at 11.9 pounds, which might be cumbersome for some users.
- Size dimensions (4.53 x 4.53 x 8.86 inches) may not fit smaller couplers or compact spaces.
The VEVOR Trailer Lock is crafted with robust materials to withstand harsh weather and potential tampering, making it an excellent choice for securing valuable trailers and boats. Its compatibility with common Bulldog coupler sizes adds to its convenience, allowing users to easily attach and lock their trailers without hassle. The included three keys provide flexibility, ensuring you have spares in case one is misplaced.
Beyond security, the corrosion-resistant feature ensures the lock maintains its integrity even in salty or wet environments, making it especially beneficial for marine applications. Its heavy-duty design not only discourages theft but also gives users confidence that their trailers and RVs are protected. This lock combines strength, durability, and practicality for anyone serious about trailer security.
Trailer Lock For 1-7/8″, 2″, 2-5/16″ & Bulldog Couplers

Ideal for trailer owners looking to secure their trailers against theft, the Trailer Lock for 1-7/8″, 2″, 2-5/16″ & Bulldog Couplers is perfect for those who prioritize safety and durability. Whether you own a small utility trailer or a larger cargo trailer, this lock is designed to fit a variety of coupler sizes and provide peace of mind when your trailer is unattended.
Pros:
- Constructed from heavy-duty hardened steel for maximum strength and durability
- Fits multiple coupler sizes including 1-7/8″, 2″, 2-5/16″ and Bulldog couplers
- Features a fully covered anti-theft design to prevent tampering
- Powder-coated finish provides excellent weather resistance and corrosion protection
- Compact dimensions (6.4″ H x 7.6″ W x 6.2″ L) make it easy to handle and store
Cons:
- May require periodic lubrication to maintain smooth locking mechanism
- Weight could be a factor for those seeking an ultra-light solution
The Trailer Lock by FixOasis offers robust security features tailored for a variety of trailer coupler sizes. Its heavy-duty hardened steel construction ensures resistance against cutting and forced entry attempts, making it a dependable choice for safeguarding trailers. The fully covered anti-theft design adds an extra layer of protection by concealing critical locking components from potential thieves, enhancing overall security.
In addition to its strength, the lock’s powder-coated finish protects it from harsh weather conditions, preventing rust and corrosion over time. This makes it suitable for long-term outdoor use without compromising its reliability or appearance. The lock’s dimensions strike a balance between providing sturdy protection and maintaining user-friendly handling, ensuring that trailer owners can easily secure and remove the lock as needed.
Nuovepe 2178-b Heavy Duty Trailer Hitch Lock

The NUOVEPE 2178-B Heavy Duty Trailer Hitch Lock is ideal for trailer owners who prioritize security and durability. Whether you own an RV, boat, cargo, utility, or livestock trailer, this lock is designed to protect your investment from theft. It is perfect for individuals seeking a robust, reliable, and easy-to-use anti-theft solution compatible with 2-inch Bulldog or Ram couplers.
Pros:
- Heavy-duty construction provides excellent security against theft.
- Compatible with 2-inch Bulldog and Ram couplers, ensuring versatile use.
- Bright blue color for easy visibility and deterrence.
- Simple installation and removal process for user convenience.
- Weather-resistant materials offer long-lasting durability in various conditions.
Cons:
- May not fit couplers smaller or larger than 2 inches.
- Bright color might not blend with all trailer aesthetics.
The NUOVEPE 2178-B Trailer Hitch Lock features a robust design tailored to secure your trailer’s tongue effectively. Its compatibility with 2-inch Bulldog or Ram couplers makes it a versatile choice for a wide range of trailers. The lock’s heavy-duty materials resist cutting and tampering, providing peace of mind when leaving your trailer unattended. It’s bright blue finish serves as a visual deterrent to potential thieves while ensuring easy identification for the owner.
Beyond its strong security features, this lock is designed for ease of use. The straightforward locking mechanism allows for quick installation and removal without requiring special tools, saving users time and effort. Its weather-resistant build ensures that the lock maintains functionality and appearance even after prolonged exposure to outdoor elements.
The NUOVEPE 2178-B is a practical investment for anyone looking to safeguard their trailer with a dependable and user-friendly hitch lock.
Nealia Upgraded Heavy Duty Trailer Lock Kit

The NeaLia Upgraded Heavy Duty Trailer Lock Kit is ideal for boat owners, truck drivers, RV enthusiasts, and anyone who frequently uses trailers with 2-5/16″ Bulldog or Ram couplers. If you are looking to enhance the security of your trailer and prevent theft while ensuring durability and weather resistance, this lock set is designed specifically for you.
Pros:
- Heavy-duty steel construction provides superior strength and long-lasting security.
- Compatible with 2-5/16″ Bulldog or Ram couplers, making it versatile for various trailer types.
- Weatherproof design ensures protection against rust and corrosion in all climates.
- Includes two keys for convenience and backup access.
- Spherical ball hitch lock adds an extra layer of anti-theft protection.
Cons:
- Relatively heavy weight at 14.55 pounds might make it less portable.
- Limited to trailers with specific coupler sizes, so not universal for all trailer types.
The NeaLia trailer lock kit features robust steel construction that withstands heavy use and harsh weather conditions, making it an excellent choice for those who frequently tow boats, campers, or equipment trailers. Its compatibility with popular 2-5/16″ Bulldog or Ram couplers ensures a snug and secure fit, minimizing the risk of unauthorized access or theft.
The lock’s weatherproof design protects it from rust and corrosion, ensuring reliable performance over time regardless of exposure to rain, snow, or saltwater environments. Users benefit from enhanced peace of mind knowing their valuable trailers are securely locked with a product built to last. The inclusion of two keys also offers convenience and ensures you will always have access when needed.
Universal Trailer Lock

The New-Universal Trailer Lock is ideal for RV owners, trailer enthusiasts, and anyone seeking reliable security for their trailers. Designed to fit a variety of coupler sizes including 1-7/8″, 2″, and 2-5/16″, this lock is perfect for those who want to protect their investment from theft, whether it’s on a flatbed, utility trailer, or travel trailer.
Pros:
- Versatile fit for multiple coupler sizes ensuring broad compatibility
- Anti-theft steel construction provides strong, durable protection
- Fully enclosed design prevents tampering and weather damage
- Patent pending technology ensures innovative security features
- Easy to install and remove for user convenience
- Silver finish offers a sleek and professional appearance
Cons:
- May be slightly heavier than some basic locks due to steel construction
- Limited to coupler sizes specified, not compatible with all trailer types
The New-Universal Trailer Lock by AUREOASIS combines robust security with exceptional versatility. Its ability to fit multiple coupler sizes means users don’t have to worry about compatibility issues. The fully enclosed design not only protects the locking mechanism from weather elements but also deters thieves by making it difficult to access the lock itself. This ensures peace of mind whether the trailer is parked in a driveway, storage facility, or on the road.
Constructed from hardened steel, the lock offers resistance against cutting or prying attempts, making it a reliable choice for long-term trailer protection. Its patent pending design highlights AUREOASIS’s commitment to innovation in security products. For RV owners and trailer users looking for a sturdy, easy-to-use, and versatile lock, this trailer tongue coupler lock is an excellent investment to safeguard their valuable equipment.
Master Lock Black Universal Size Trailer Hitch Lock

The Master Lock Black Universal Size Trailer Hitch Lock is ideal for anyone looking to secure their RV, horse trailers, tool trailers, or other types of trailers. Whether you are a recreational vehicle owner, a horse enthusiast, or a contractor needing to protect valuable equipment, this lock offers robust security and peace of mind. It is especially suited for those who require a reliable and easy-to-use locking mechanism to prevent theft and unauthorized access.
Pros:
- Durable black finish resists weather and corrosion
- Universal size fits most trailer couplers
- Compact and lightweight design (only 1.0 pounds)
- Easy to install and remove for convenience
- Manufactured by trusted Master Lock brand ensuring quality
Cons:
- May not fit very specialized or oversized trailer couplers
- Limited color options available (only black)
The Master Lock 379ATPY features a sturdy construction with dimensions of 4.6 inches in height, 3.5 inches in width, and 5.1 inches in length, making it a compact yet effective security device. Its universal size design ensures compatibility with a wide range of trailer couplers, providing versatile protection for different types of trailers. The solid black color not only offers a sleek appearance but also adds a layer of weather resistance to withstand outdoor conditions.
Users benefit from the lock’s ease of use, as it can be quickly installed and removed without the need for complicated tools. Its lightweight build means it won’t add unnecessary bulk or weight to your trailer setup. Backed by the renowned Master Lock brand, this trailer hitch lock guarantees reliable security, helping to deter theft and keep valuable assets safe wherever you go.
Frequently Asked Questions
What Sizes Do These Trailer Locks Fit?
These locks fit 1-7/8″, 2″, 2-5/16″, and Bulldog couplers. They are designed for universal compatibility across many trailer types.
Are These Trailer Locks Weather-resistant?
Yes, most locks are powder-coated and corrosion-resistant. This ensures durability and protection against harsh weather conditions.
How Secure Are These Bulldog Hitch Trailer Locks?
They feature heavy-duty hardened steel and fully enclosed designs. This provides strong anti-theft protection for your trailer and hitch.
Do These Locks Come With Keys?
Yes, they include multiple keys, typically three. This allows convenient access and backup in case of key loss.
Can These Locks Secure Security Chains Too?
Many models secure both the coupler and safety chains. This enhances trailer security by preventing unauthorized detachment.
Are These Trailer Locks Easy To Install?
Yes, they are designed for quick, tool-free installation. Most users can secure their trailer in seconds without hassle.
Conclusion
Choosing the right trailer lock for your Bulldog hitch is essential for safety. The locks reviewed offer strong protection against theft and weather damage. Many fit a variety of coupler sizes, making them versatile and practical. Steel construction ensures durability and resistance to rust and corrosion.
Most come with keys and secure chains, giving extra peace of mind. Whether you have an RV, boat, or utility trailer, these locks help keep your trailer safe. Easy to use and weather-resistant, they protect your investment effectively. Always pick a lock that matches your trailer’s coupler size for the best fit.
Investing in a reliable trailer lock reduces stress and protects your property. Make sure to check the features and choose one that suits your needs. Secure your trailer confidently with the best lock designed for Bulldog hitches.