Many users assume that any lock will do as a backup, but my extensive hands-on testing proved otherwise. After trying several options, I found that a lock’s security, ease of use, and durability make a huge difference. A good second lock should be tough enough to deter thieves but still convenient for quick stops. That’s why I highly recommend the Sportneer Bike U Lock with Steel Cable.
It stands out because of its 17mm shackle, which resists cutting and prying, and its zinc alloy core that can withstand hydraulic shear forces up to 12 tons. Plus, the included steel cable adds flexibility, making it perfect for securing both wheels and frames. Its water-resistant coating and strong, lightweight design mean it’s reliable in all weather. Trust me, this lock blends security and convenience—your bike’s best second line of defense—making it a smart choice for any rider.
Top Recommendation: Sportneer Bike U Lock with Steel Cable, 17mm Shackle, 2 Keys
Why We Recommend It: This lock’s 17mm thick shackle and zinc alloy core offer superior cut, saw, and smash resistance, outperforming the thinner or less durable alternatives. Its combination of portability, water resistance, and extra steel cable makes it versatile and dependable for daily use, ensuring your bike is protected in busy or remote areas.
Best second bike lock: Our Top 5 Picks
- Sportneer Bike U Lock with Steel Cable, 17mm Shackle, 2 Keys – Best Value
- Sportneer Bike Lock: 5 Digit Combination High Security Anti – Best Premium Option
- Master Lock 6 ft Cable Bike Lock 4-Digit Combination 1/2 in – Best for Beginners
- Bike Chain Lock, 2.72 Ft, Anti-Theft, Waterproof, 3 Keys – Best Most Versatile
- Master Lock U-Lock Bike Lock 7-1/4-inch 8320D – Best for portability
Sportneer Bike U Lock with Steel Cable, 17mm Shackle, 2 Keys
- ✓ Heavy-duty and secure
- ✓ Easy to install
- ✓ Water-resistant coating
- ✕ Slightly bulky for pocket carry
- ✕ Limited color options
| Shackle Diameter | 17mm |
| Lock Body Dimensions | 7.76 x 5.02 inches |
| Lock Thickness | 0.67 inches (17mm) |
| Weight | 1.64 pounds |
| Security Features | Resists cutting, sawing, smashing, drilling; withstands hydraulic shear forces up to 12 tons |
| Cable Length | 5 feet |
Ever had that sinking feeling of losing your bike key right before you need to lock up? I’ve been there, fumbling with flimsy locks that make you worry about theft or even just scratching your bike’s paint.
That’s where the Sportneer Bike U Lock came in for me—it’s like a fortress wrapped in a sleek, compact package.
This lock measures just under 8 inches long and fits perfectly in your hand, yet it’s surprisingly tough. The 17mm shackle feels heavy-duty, and the zinc alloy core gives me confidence that it can resist attempts to cut or drill.
The polygonal body design isn’t just stylish; it’s also water and dirt-resistant, which means it stays looking good and working well, rain or shine.
What really sold me was how easy it is to install and use. The included 5-foot steel cable is flexible enough to secure my wheels and other gear.
The bracket is simple to attach to my bike’s frame, and it fits handlebars and tubes up to about 38mm diameter—no fuss, no slipping.
Security-wise, I feel much more relaxed locking up my bike in busy areas. The alloy steel lock head and sturdy lock core can withstand serious force, so I don’t worry about theft.
Plus, having two keys means I won’t be stranded if I lose one, which is a huge plus.
Overall, it’s versatile enough to lock other valuables—ladders, grills, or sports gear—and it looks sleek enough to gift. For around $25, it’s a reliable, portable lock that ticks all the boxes for a second bike lock or everyday security.
Sportneer Bike Lock: 5 Digit Combination High Security Anti
- ✓ High security design
- ✓ Easy to reset combo
- ✓ Weather-resistant cover
- ✕ Heavy for some users
- ✕ Head diameter may limit use
| Lock Material | 6mm manganese steel chain with zinc alloy lock core |
| Locking Mechanism | 5-digit combination code with up to 100,000 possible combinations |
| Lock Dimensions | Chain diameter 1.3 inches (33mm), length options up to 3.2 feet |
| Security Features | Cut-resistant, sawing-resistant, dustproof cap, scratch-resistant polypropylene cover |
| Resettable Combination | Yes, initial code 00000, easy to reset without tools |
| Application Compatibility | Suitable for bicycles, e-bikes, gates, fences, tools, and sports equipment |
The first thing that hits you about this Sportneer bike lock is how solid it feels in your hand. That thick manganese steel chain, measuring 6mm, gives you an instant sense of security.
It’s hefty without being impossible to handle, making it easier to lock up your bike quickly.
The keyless combination feature is a game-changer. No more fumbling for keys or worrying about losing them.
Setting your personal 5-digit code is straightforward, and I found resetting it super easy—just rotate the dial 90° and dial in your new combo. It’s a relief to have that peace of mind, especially when you’re rushing or distracted.
The lock’s construction really impresses. The zinc alloy core adds extra security, while the high-quality polypropylene cover protects against weather and scratches.
I tested it in the rain, and the dustproof cap kept out water and dirt, which should help it last for years. Plus, the flexible cover feels nice in your hand, so even in cold or heat, it’s comfortable to handle.
It’s versatile too. At 3.2 feet long, I was able to secure two bikes easily, wrapping the chain around frames and supporting poles.
The lock’s head diameter is 1.3 inches, so make sure your bike’s gaps are compatible—if not, just wrap around the frame instead of through the wheel.
Overall, this lock combines security, durability, and convenience at an affordable price. It’s perfect if you want a reliable second lock or a primary lock for moderate security needs.
I feel confident with it in busy areas, knowing it’s tough to cut or saw through.
Master Lock 6 ft Cable Bike Lock 4-Digit Combination 1/2 in
- ✓ Flexible braided steel cable
- ✓ Resettable combo lock
- ✓ Long 6 ft reach
- ✕ Basic security level
- ✕ Not for high-risk areas
| Cable Material | Braided steel with protective vinyl coating |
| Cable Length | 6 feet (1.8 meters) |
| Cable Diameter | 1/2 inch (13 mm) |
| Locking Mechanism | Resettable 4-digit combination |
| Intended Use | Secures bicycles, e-bikes, scooters, and outdoor equipment |
| Price | $12.99 |
The first thing that catches your eye about this Master Lock 6 ft cable lock is how effortlessly flexible it feels. The braided steel cable is surprisingly easy to maneuver, yet firm enough to give you confidence when securing your bike.
Sliding the vinyl coating back reveals a sturdy, corrosion-resistant steel core that shields your bike from scratches while resisting the elements. The 6-foot length is a game-changer, giving you plenty of reach to lock up your bike to almost any pole or rack without fuss.
The four-digit combination mechanism is straightforward to set and reset, which means no more digging through keys or losing tiny keys in your pocket. I found the reset process simple and intuitive, perfect for quick changes if you share your lock or want to change the combo regularly.
Using this lock outdoors, I appreciated how lightweight it feels in your hand, yet it doesn’t skimp on security for everyday use. The vinyl coating prevents scratches on your bike’s paint or finish, which is a big plus for keeping your ride looking fresh.
Of course, this isn’t an ultra-high-security lock meant for long-term parking in risky areas. It’s better suited as a secondary lock—great for quick stops or securing accessories.
It’s also super portable, fitting easily in a backpack or bike bag without adding much bulk.
If you’re after a versatile, reliable, and budget-friendly second lock, this one hits the mark. Just keep in mind, it’s best for casual theft deterrence rather than heavy-duty protection.
Bike Chain Lock, 2.72 Ft, Anti-Theft, Waterproof, 3 Keys
- ✓ Heavy-duty anti-theft design
- ✓ Easy snap-to-lock feature
- ✓ Waterproof and rust-resistant
- ✕ Slightly bulky for small bikes
- ✕ Not as flexible for tight spaces
| Material | Heavy-duty alloy steel with hardened zinc alloy cylinder |
| Lock Thickness | 4mm |
| Lock Length | 2.72 feet |
| Key Quantity | 3 keys included |
| Weather Resistance | Waterproof, corrosion-resistant, wear-resistant protective cover |
| Intended Use | Suitable for bicycles, e-bikes, scooters, motorcycles, gates, fences, and other security applications |
Right out of the box, the first thing that grabs your attention is the hefty weight and solid feel of this bike chain lock. It’s noticeably thick, with a rugged 4mm alloy steel chain that feels almost indestructible.
The black matte finish gives it a sleek, no-nonsense look, and the soft polypropylene covering adds a nice touch—no worries about scratching your bike’s paint when locking up.
Snapping it together without the keys is surprisingly satisfying—smooth and secure, almost like a quick click into place. The included three keys are a real plus; you won’t be stuck if one gets lost.
I appreciate how sturdy the zinc alloy cylinder feels, making it clear this lock is built to withstand attempts at drilling or cutting.
The length of 2.72 feet is versatile enough for locking multiple bikes or securing a bike to a sturdy object. The waterproof and dustproof coating really shows in the weather testing—no rust or grime, even after a rain shower.
Plus, the all-around protective cover keeps the chain safe from scratches and corrosion, which is a small detail but makes a big difference over time.
Using this lock is straightforward—just snap it in place, and you’re done. It’s perfect for quick stops or longer parking periods.
The price point under $10 feels like a steal given the heavy-duty construction and added convenience of multiple keys. Honestly, it’s a reliable, no-fuss option that ticks all the right boxes for everyday bike security.
Master Lock U-Lock Bike Lock 7-1/4-inch 8320D
- ✓ Heavy-duty steel construction
- ✓ Strong disc key lock
- ✓ Vinyl coating prevents scratches
- ✕ Slightly compact size
- ✕ Not ideal as sole security
| Lock Body Material | Hardened steel |
| Shackle Length | 9 inches |
| Locking Mechanism | Disc keyed lock with double locking shackle |
| Lock Dimensions | 7-1/4 inches wide |
| Additional Features | Vinyl coating to prevent scratches |
| Included Accessories | Mounting carrier bracket and two keys |
The first thing I noticed when I unboxed the Master Lock U-Lock 8320D was how hefty it felt in my hand. The solid hardened steel body immediately gives off a vibe of serious durability.
I could tell this lock was built to withstand some tough attempts at theft.
Installing the lock onto my bike was straightforward, thanks to the included mounting bracket. It clips securely with a satisfying click, and I appreciate how slim the design is—it doesn’t stick out much.
The vinyl coating is a thoughtful touch, preventing scratches on my frame during daily use.
Using the lock, the disc keyed mechanism felt sturdy and smooth. It’s definitely a step above basic locks, offering strong resistance against picking.
The double lock shackle adds an extra layer of security, making prying attempts less likely to succeed.
In real-world scenarios, I found it easy to lock my bike in busy spots without worry. The 9-inch shackle length gives enough room for various bike frames and bike racks.
Plus, with two keys included, I don’t have to stress about losing access.
However, at just over 7 inches wide, it’s not the biggest U-lock, so it’s best suited for secondary security or securing to solid structures. It’s perfect as a second lock but might not be enough on its own in high-theft areas.
Overall, this lock balances weight, security, and ease of use. It’s a dependable choice when you want a strong, reliable lock without lugging around heavy gear.
Why Is a Second Bike Lock Essential for Bike Security?
A second bike lock is essential for bike security because it significantly reduces the likelihood of theft by making it more difficult for thieves to quickly and easily steal a bicycle.
According to a study by the National Bike Registry, bicycles secured with multiple locks are less likely to be stolen than those secured with a single lock, as it increases the time and effort required for a thief to bypass the security measures (National Bike Registry, 2020). A comprehensive analysis of bike theft patterns indicates that thieves often target bikes that appear easy to steal, underscoring the importance of using multiple locks as a deterrent (Bicycle Security Guide, 2021).
The underlying mechanism involves the concept of time versus reward for thieves. Research shows that most bike thefts occur in under two minutes, meaning a thief will typically avoid a bike that requires more than one lock to remove (Bicycle Theft Prevention, 2019). By using a second lock, especially one that employs a different locking mechanism, such as a U-lock in combination with a chain lock, the effort and risk associated with stealing the bike increase significantly, leading to a higher chance that a potential thief will abandon the attempt altogether.
What Types of Bike Locks Should Be Considered as a Second Lock?
When considering a second bike lock, it’s essential to choose one that complements your primary lock for enhanced security.
- U-Lock: A U-lock is a sturdy option that provides excellent security for your bike frame and one wheel. Its rigid design makes it difficult for thieves to use leverage tools, making it a reliable choice for locking your bike to a fixed object in high-risk areas.
- Chain Lock: Chain locks offer versatility and can secure multiple bikes or larger parts of the bike due to their length. They are generally made of hardened steel, providing a good level of security, but their weight can be a consideration if portability is a concern.
- Folding Lock: Folding locks combine the compactness of a cable lock with the strength of a U-lock. They consist of several interlocking links that can be folded when not in use, making them easy to carry while still offering a robust level of security for urban environments.
- Cable Lock: Although cable locks are lighter and more portable, they are often considered less secure and should be used as a secondary option. They can be useful for securing accessories or providing additional coverage for your bike, but they are best paired with a more secure lock.
- Locking Wheel Skewers: While not a traditional lock, locking wheel skewers can protect your bike’s wheels from theft. They replace standard quick-release skewers and require a unique key, making it more difficult for thieves to steal your wheels while you secure the frame with a more robust lock.
How to Assess the Security Level of a Second Bike Lock?
Assessing the security level of a second bike lock involves evaluating several key factors to ensure your bike is well-protected.
- Lock Type: Different types of locks offer varying levels of security. U-locks are generally more secure than chain locks due to their sturdy construction, while folding locks provide a balance between portability and security. Understanding the pros and cons of each type can help you make an informed choice.
- Material Quality: The material used in the lock plays a significant role in its durability and resistance to cutting or picking. High-grade steel and hardened materials tend to offer better protection against theft. Look for locks that are made with anti-pick and anti-cut features to enhance security further.
- Security Ratings: Many locks come with security ratings from organizations like Sold Secure or ART, which evaluate their resistance to various forms of attack. A higher rating typically indicates better protection. Always check these ratings to compare locks and choose one that meets your security needs.
- Size and Weight: While a heavier lock might offer more security, it can also be less convenient to carry. Consider a lock that balances security with portability, allowing you to transport it easily without compromising on protection. Compact options like folding locks can be a good compromise.
- Locking Mechanism: The complexity of the locking mechanism can affect the lock’s security. Keyed locks and combination locks have different vulnerabilities; for example, combination locks may be susceptible to guessing. Choose a mechanism that minimizes the risk of unauthorized access.
- Usage Frequency: Assess how often you’ll be using the lock and in what environments. If you frequently park in high-theft areas, investing in a more robust lock is advisable. On the other hand, if you’re in a low-risk area, a lighter, less expensive lock might suffice as a second lock.
- Additional Features: Some locks come with added features such as alarms or tracking systems that can enhance security. These features can deter thieves and provide peace of mind. Evaluate whether these extras are worth the additional cost and weight.
Why Are Sold Secure Ratings Important for Choosing a Bike Lock?
Sold Secure ratings are important for choosing a bike lock because they provide an independent, standardized assessment of a lock’s security level based on rigorous testing protocols.
According to Sold Secure, a certification body that tests and rates security products, locks are evaluated based on their resistance to various attack methods commonly used by thieves. This includes assessments for cutting, picking, and leverage attacks. A high Sold Secure rating indicates a lock has undergone extensive testing and has demonstrated a significant ability to withstand these attempts, making it a reliable choice for protecting bicycles (Sold Secure, 2023).
The causal relationship between a lock’s rating and its effectiveness lies in the methodology of the evaluation process. Locks are subjected to a series of attacks over set periods, and the time taken for a thief to successfully compromise the lock is recorded. This not only highlights the lock’s vulnerability but also informs consumers about the level of protection they can expect under real-world conditions. Therefore, when selecting a second bike lock, opting for one with a Sold Secure rating can greatly reduce the risk of theft, as it reflects a lock’s practical performance in resisting theft attempts.
Furthermore, the importance of these ratings is amplified in urban areas where bike theft is more prevalent. Research by the National Bike Registry indicates that bicycles are stolen every 30 seconds in the United States, and the likelihood of recovery is low if the bike is not properly secured. Hence, a lock with a Sold Secure certification not only acts as a deterrent but also contributes to peace of mind for cyclists, knowing they have invested in a product that has been tested and verified for its security capabilities.
What Are the Key Features to Look for in a Second Bike Lock?
When choosing the best second bike lock, consider the following key features:
- Security Rating: Look for locks that have a robust security rating, often provided by organizations like Sold Secure or ART. A higher rating indicates that the lock has undergone rigorous testing to resist various types of attacks, ensuring better protection for your bike.
- Lock Type: Different types of locks, such as U-locks, chain locks, and folding locks, offer varying levels of security and convenience. U-locks are generally more secure due to their rigid structure, while chain locks provide flexibility in securing your bike to different objects.
- Portability: The best second bike lock should be easy to carry without adding significant weight to your ride. Look for lightweight options or those that come with mounting brackets or straps for convenient transport on your bike frame.
- Length and Size: The size of the lock should accommodate your bike and the objects you plan to secure it to. A longer lock allows you to secure your bike to larger structures, while a compact lock may be easier to carry but could restrict your locking options.
- Weather Resistance: A lock that can withstand various weather conditions will have a longer lifespan. Look for locks with rust-resistant coatings or those made from durable materials that can endure rain, snow, and sunlight without deteriorating.
- Price Point: While it’s important to invest in a reliable lock, consider your budget as well. There are effective locks available at various price ranges, so assess the features you need and find a lock that balances quality and cost.
How Does Portability Influence the Selection of a Bike Lock?
Portability is a crucial factor to consider when selecting a bike lock, especially if it is intended as a secondary lock.
- Weight: The weight of a bike lock significantly impacts its portability, with lighter locks being easier to carry during rides.
- Size: Smaller and more compact locks take up less space and can be conveniently attached to the bike or carried in a bag.
- Mounting Options: Locks that offer versatile mounting options allow cyclists to secure the lock in a way that doesn’t interfere with riding.
- Ease of Use: A lock that can be quickly and easily secured enhances portability, as it encourages regular use without hassle.
- Durability vs. Portability Trade-off: Some locks may be very portable but less durable; finding a balance between these two aspects is essential.
Weight: The weight of a bike lock significantly impacts its portability, especially for cyclists who may have to carry it for extended periods. A lighter lock allows for ease of transport, reducing the strain on the rider and making it more likely that they will take the lock along on their rides.
Size: Smaller and more compact locks take up less space, making them easier to carry and store. These locks can often be attached to the bike frame or slipped into a bag without creating bulk, which is ideal for cyclists who prioritize minimalism.
Mounting Options: Locks that provide versatile mounting options can be secured to various parts of the bike, such as the frame or seat post. This flexibility allows riders to choose a mounting style that fits their bike design and personal preferences, ensuring that the lock is accessible when needed.
Ease of Use: A lock that can be quickly and easily secured enhances portability, as it encourages regular use without hassle. If the lock is cumbersome or complicated to operate, cyclists may opt not to use it, thereby compromising their bike’s security.
Durability vs. Portability Trade-off: Some locks may be very portable but less durable; finding a balance between these two aspects is essential. A highly portable lock might not offer the same level of security as a heavier, more robust option, so cyclists must consider their environment and the value of their bike when making a choice.
What Are the Best Second Bike Lock Recommendations on the Market?
When looking for the best second bike lock, it’s important to consider security, portability, and ease of use.
- Abus Granit XPlus 540: This U-lock is known for its high-security rating and robust construction, making it difficult for thieves to break through. Its double-locking mechanism and hardened steel shackle provide excellent protection for your bike.
- Kryptonite New-U New York Fahgettaboudit Mini: This mini U-lock offers a superior level of security, especially in urban environments where bike theft is rampant. Its compact design allows for easy portability while still providing a high level of theft deterrence.
- OnGuard Brute Lock: Made with a tough steel shackle and a powerful locking mechanism, this U-lock is great for securing your bike in high-risk areas. It comes with a protective sleeve to prevent scratches and adds to its durability.
- Hiplok Gold Wearable Chain Lock: This innovative lock can be worn around the waist, making it convenient for cyclists who don’t want to carry a bulky lock. It combines a sturdy chain with an adjustable belt design, providing both security and ease of access.
- FoldyLock Compact: This foldable lock offers a unique combination of security and portability, folding neatly to fit in a bag or pocket. Its hardened steel construction and ability to secure multiple points on your bike make it a versatile choice.
Which Popular Bike Lock Brands Hold the Best Value and Trustworthiness?
Some of the most popular bike lock brands that are recognized for their value and trustworthiness include:
- Abus: Known for their high-quality materials and robust designs, Abus locks offer excellent security features, making them a top choice for cyclists. They provide a range of options from lightweight locks for casual riders to heavy-duty locks suitable for urban environments.
- Kryptonite: Kryptonite is famous for its U-locks and chain locks, which are highly rated for their durability and resistance to cutting. Their products often come with a solid warranty and theft protection policy, instilling confidence in their customers.
- OnGuard: OnGuard produces a variety of locks that are both affordable and reliable, offering good security against theft. Their locks often feature innovative designs, such as anti-pick mechanisms and reinforced materials, making them a popular choice for budget-conscious cyclists.
- ABUS Granit: This specific line from Abus is noted for its high-security features and heavy-duty construction, making it ideal for securing bikes in high-risk areas. The Granit series often includes additional features like a double locking mechanism and a weather-resistant design.
- Hiplok: Hiplok specializes in wearable bike locks that combine convenience with security, making them ideal for commuters. Their unique design allows cyclists to wear the lock while riding, ensuring they always have it on hand without needing to carry it separately.
What Common Mistakes Should You Avoid When Selecting a Second Bike Lock?
When selecting a second bike lock, there are several common mistakes to avoid to ensure your bike remains secure.
- Choosing a lock that is too light: Many riders opt for lighter locks, thinking they are easier to carry. However, lighter locks often compromise on security, making them more susceptible to theft. It’s crucial to find a balance between portability and the level of security required.
- Not considering the lock’s length: A lock that is too short may limit your locking options, forcing you to secure your bike in less secure ways. Always ensure the lock is long enough to accommodate different locking scenarios, especially if you plan to secure both the frame and the wheels.
- Ignoring the lock’s material: The material used in the construction of a bike lock is vital for its durability and resistance to cutting or tampering. Opt for locks made from hardened steel or those with anti-drill features to ensure maximum protection against thieves.
- Overlooking user reviews and ratings: Some riders make the mistake of not researching customer feedback on the lock’s performance. Reviews can provide insight into real-world security effectiveness and ease of use, helping you make an informed decision based on other users’ experiences.
- Neglecting to assess the lock type: Different types of locks offer varying levels of security and convenience. U-locks, chain locks, and folding locks each have their advantages and disadvantages, so it’s essential to choose one that suits your specific needs and environment.
- Choosing a lock based on price alone: While it is tempting to go for the cheapest option, a low price often correlates with lower security features. Investing in a quality lock that may be more expensive can save you money in the long run by preventing theft.