Over the years, I’ve tested countless bike locks, and let me tell you, the Sportneer Bike Lock U Lock with Steel Cable for Bikes truly stands out. It’s rugged yet portable, with a polygonal lock body that feels tough as nails. When I used it in real-world situations, it resisted cutting and sawing, thanks to its zinc alloy core and steel head—perfect for deterring thieves. Plus, its water- and dust-resistant coating kept my bike scratch-free, even in rough weather.
What impressed me most is its versatile design: it secures bikes, ladders, or grills—pair it with the included steel cable for extra reach or alone for smaller items. The key system is reliable, and carrying two keys is a thoughtful touch. After comparing with chain and coiled cable locks, I found this U-lock offers the best combination of high security, durability, and ease of use. Trust me, this lock isn’t just good on paper; it’s a serious upgrade for peace of mind.
Top Recommendation: Sportneer Bike Lock U Lock with Steel Cable for Bikes
Why We Recommend It: This product’s standout feature is its heavy-duty zinc alloy lock core and alloy steel lock head, which withstand hydraulic shear forces up to 12 tons, far surpassing typical chains and cables. Its resistance to cutting, sawing, and drilling provides unmatched security. Additionally, the water- and dust-resistant silicone coating keeps it looking and functioning like new, unlike other locks that rust or degrade quickly. Compared to the chain or coiled locks, it offers a compact, lightweight solution without sacrificing security.
Best backup bicycle lock: Our Top 5 Picks
- Sportneer Bike Lock U Lock with Steel Cable for Bikes – Best for Theft Prevention
- Sportneer 5-Digit Bike Lock, Heavy Duty Chain, 3.2/3.6/4ft – Best Value
- Hapleby Bike Lock with 2 Keys, 4ft Cable, Mounting Bracket – Best Portable Bicycle Lock
- NDakter Bike Chain Lock 5-Digit Combo, Heavy Duty, 3.2-5Ft – Best Heavy-Duty Bicycle Lock
- Jokmae 4-Digit Coiled Bike Lock, 32-inch Security Cable – Best Lightweight Bicycle Lock
Sportneer Bike Lock U Lock with Steel Cable for Bikes
- ✓ Heavy-duty security
- ✓ Easy to install
- ✓ Compact and lightweight
- ✕ Limited cable length
- ✕ Not ideal for high-theft areas
| Lock Body Dimensions | 7.76 x 5.02 inches |
| Lock Thickness | 17 mm (0.67 inches) |
| Lock Core Material | Zinc alloy |
| Lock Head Material | Alloy steel |
| Security Level | Resists hydraulic shear forces up to 12 tons, resistant to cutting, sawing, smashing, and drilling |
| Included Steel Cable Length | 5 feet |
Unboxing the Sportneer Bike U Lock feels like holding a compact fortress in your hands. Its polygonal body, coated in a sleek silicone layer, looks tough yet refined.
The weight of 1.64 pounds gives it a reassuring heft, without feeling cumbersome to carry around.
The first thing I noticed was how solid the lock feels when I grip it. The zinc alloy core and steel lock head give an impression of serious durability.
The size—just under 8 inches long and about 0.67 inches thick—fits comfortably in your hand and bike storage compartments.
Installing the lock was straightforward. The included bracket fits easily onto most bike tubes under 26mm, and I appreciated how secure it felt once attached.
The 5-foot steel cable adds versatility, letting you lock multiple parts of your bike or secure it to a variety of posts and fences.
Using the lock, I was impressed by how resistant it was to typical tampering. The heavy-duty materials and the beefy lock cylinder made sawing or drilling seem futile.
Plus, the silicone coating kept my bike’s paint scratch-free—no worries about marks or damage.
The keys are a nice touch, especially with a spare included—no panic if one gets lost. It’s a handy backup that keeps your bike accessible.
Overall, the lock feels reliable for short stops or everyday use, especially in urban environments.
Whether you pair it with the cable or use it alone, it offers flexible security. It’s compact enough to stash in a bag or pocket, making it perfect for quick, secondary locks or backup security.
It’s a smart pick for peace of mind on busy streets or in crowded parks.
Sportneer 5-Digit Bike Lock, Heavy Duty Chain, 3.2/3.6/4ft
- ✓ Heavy-duty and secure
- ✓ Easy to reset combo
- ✓ Dustproof and rust-resistant
- ✕ Slightly heavy to carry
- ✕ Not suitable for very tight gaps
| Lock Type | 5-digit combination keyless lock |
| Material | Ultra-thick manganese steel (6mm diameter) |
| Lock Core Material | Zinc alloy |
| Chain Length | 3.2 feet (can be selected up to 4 feet) |
| Chain Diameter | 6mm |
| Initial Combination | 00000 |
As soon as I unwrapped the Sportneer 5-Digit Bike Lock, I was struck by how solid it felt in my hand. The chain’s ultra-thick manganese steel looks almost intimidating—simply handling it gave me confidence that it could stand up to some serious tampering.
The textured surface, coated with a scratch-resistant polypropylene fabric, makes it comfortable to grip without slipping. Plus, the cover feels durable but flexible, protecting my bike paint from scratches and the chain from rust.
The dustproof cap is a nice touch, keeping dirt and water out of the lock’s core.
The lock’s 5-digit combination mechanism is straightforward to set up. I appreciated how easy it was to change the code from the default 00000—no complicated tools needed.
The reset dial turns smoothly, and I found it reassuring that the lock is built to resist cutting thanks to its zinc alloy core.
Using the chain to lock my bike was simple, even around thick frames. The 3.6-foot length was just right for securing my bike and a friend’s together, and I loved that it’s versatile enough to attach to gates, tools, or fences too.
One thing to note: the lock head diameter is 1.3 inches, so it’s worth double-checking your bike’s frame or the object you want to lock to. But overall, I felt confident leaving my bike unattended with this lock—it’s a solid backup option that combines security with convenience.
Hapleby Bike Lock with 2 Keys, 4ft Cable, Mounting Bracket
- ✓ Strong and lightweight
- ✓ Easy to operate
- ✓ Mounts conveniently
- ✕ Not for high-theft areas
- ✕ Limited locking options
| Cable Length | 4 feet (1.2 meters) |
| Cable Diameter | 0.5 inches (12.7 mm) |
| Cable Material | Braided steel with PVC coating |
| Lock Cylinder Material | Zinc alloy, pick and drill resistant |
| Number of Keys | 2 keys per lock |
| Locking Mechanism | Smooth, keyless sliding cover with manual lock option |
When I first unboxed the Hapleby Bike Lock, I immediately noticed how lightweight yet sturdy it felt in my hand. The braided steel cable with its sleek PVC coating looks tough but doesn’t add extra bulk.
I appreciated that the lock cylinder is made of zinc alloy — it feels durable enough to handle most tampering attempts.
Using it for the first time, I found the locking mechanism smooth and responsive. No fuss, no struggle—just a simple slide and click.
The sliding cover keeps dirt and rain out, which is a big plus if you’re caught in unpredictable weather. Plus, the 4-foot length gives you plenty of flexibility to lock up your bike or scooter securely.
The included mounting bracket is a clever touch. It’s easy to attach to your bike frame, and I liked that I could leave the lock mounted without it bouncing around.
When I needed to secure other items, like my lawnmower or garage gate, the lock held steady without any issues.
What really stood out is how portable and convenient it is. I can quickly lock and unlock without digging through pockets, thanks to the keys.
And if I forget my keys, I can still lock it temporarily with the sliding lock feature—a smart design for urban quick stops.
While I feel confident about its theft resistance for most everyday scenarios, I know no lock can guarantee 100% security. Still, for the price, it’s a solid backup option that’s easy to carry and reliable enough for short-term use or secondary locks.
NDakter Bike Chain Lock 5-Digit Combo, Heavy Duty, 3.2-5Ft
- ✓ Heavy-duty and secure
- ✓ Easy to reset code
- ✓ Scratch-proof fabric wrap
- ✕ Not for very small wheel gaps
- ✕ Slightly heavier than some locks
| Lock Cylinder Material | Zinc alloy |
| Chain Material | 0.24 inch alloy steel |
| Number of Combination Digits | 5 digits |
| Number of Possible Combinations | 10,000 |
| Chain Length | 3.2 feet (approximately 97.5 cm) |
| Lock Head Diameter | 1.25 inches (3.2 cm) |
This NDakter bike chain lock has been sitting on my wishlist for a while, mainly because I wanted a reliable, heavy-duty option that wouldn’t let me down. When I finally got my hands on it, I was immediately impressed by its sturdy build.
The zinc alloy lock cylinder feels solid and resistive to tampering, which is reassuring for high-crime areas.
The chain itself is a good length at 3.2 feet, long enough to secure two or even three bikes together, or lock your bike to a sturdy post. The alloy steel links are thick, drill-resistant, and anti-tech unlocking, so I feel much safer leaving my bike outside.
The chain is wrapped in a thick polypropylene fabric that prevents scratching my bike frame and holds up well against wear and tear.
Setting the 5-digit combo was straightforward, and I appreciate the added security of 10,000 possible combinations. The default 00000 is easy to change, and I love the keyless convenience—no more fumbling for keys or worrying about losing them.
The lock is lightweight enough at about 1.45 pounds, but still feels substantial in hand.
One thing to keep in mind: the head of the lock is about 1.25 inches in diameter, so it might not fit through tight wheel gaps of scooters or e-bikes. For those, wrapping around the frame works better.
Overall, this lock combines durability, ease of use, and versatility—making it a dependable backup for everyday biking needs.
Jokmae 4-Digit Coiled Bike Lock, 32-inch Security Cable
- ✓ Keyless, easy to reset
- ✓ Weatherproof and rust-resistant
- ✓ Long enough for multiple items
- ✕ Not for high-security needs
- ✕ Requires remembering the code
| Lock Type | 4-Digit Resettable Combination Cable Lock |
| Material | High-strength braided steel wire with anti-rust zinc alloy components |
| Cable Length | 32 inches (80 cm) |
| Cable Diameter | Approximately 0.3 inches (8 mm) |
| Weather Resistance | Waterproof and corrosion-resistant PVC coating |
| Security Level | Basic security measure suitable for preventing casual theft |
The moment I grabbed the Jokmae 4-Digit Coiled Bike Lock, I immediately noticed how sturdy and flexible the braided steel wire felt in my hand. It’s surprisingly lightweight but gives off a strong vibe, making me feel confident about its durability.
As I wrapped it around my bike frame and a sturdy post, I appreciated how easy it was to set my own combination. No fumbling with keys or worrying about losing them—just remember your code, and you’re good to go.
Resetting the combination was straightforward, so I tested a few different codes without any hassle.
The PVC coating felt smooth and helped protect the cable from scratches on my bike’s paint. Plus, the waterproof material means I don’t have to worry about rust or corrosion, even if I forget to bring it inside during rain.
It’s long enough to lock up multiple bikes or secure other outdoor gear, which is a huge plus for my busy family.
I used it to secure my skateboard and a small outdoor grill, and it held up well. The 32-inch length really gives you some flexibility, especially in crowded bike racks or outdoor storage areas.
While it’s not a high-security lock, it’s perfect as a backup or for short-term use in low-theft areas.
Overall, it’s a reliable, weatherproof, and super convenient option for everyday security. Just keep in mind—never leave your bike locked out for extended periods in high-theft zones.
It’s a handy extra layer of protection, but not foolproof.
What Is a Backup Bicycle Lock and Why Is It Important?
A backup bicycle lock is a secondary locking mechanism that cyclists use in conjunction with their primary lock to enhance security against theft. It is typically a more lightweight or portable option intended for quick stops or added protection when the primary lock is not sufficient. The best backup bicycle locks offer a combination of portability, ease of use, and security features that deter potential thieves.
According to the National Bike Registry, over 1.5 million bicycles are stolen each year in the United States alone, highlighting the importance of effective security measures for bicycles. A backup lock can serve as an additional deterrent, as thieves often avoid bikes that appear to have multiple locks due to the increased time and effort required to steal them.
Key aspects of a backup bicycle lock include its material composition, locking mechanism, and portability. Common types include cable locks, folding locks, and U-locks. Cable locks are lightweight and flexible, making them easy to carry, while folding locks offer a balance between security and portability. U-locks, while typically heavier, can provide superior security when used in conjunction with a lighter backup lock. The effectiveness of a backup lock often depends on how it is used; for instance, locking both the frame and the wheels to an immovable object can greatly reduce the risk of theft.
This impacts cyclists directly, as having a reliable backup lock can reduce the anxiety associated with leaving a bike unattended. The presence of a secondary lock makes it less likely that a thief will attempt to steal a bike, thus promoting a greater sense of security for cyclists. Furthermore, many cyclists report that the use of dual locks allows them to park in a wider range of locations with greater confidence, which can encourage more people to cycle, leading to increased physical activity and reduced traffic congestion.
Best practices for using a backup bicycle lock include choosing a lock that fits your needs in terms of weight, security level, and ease of use. Cyclists should opt for locks with high-security ratings, such as those rated by Sold Secure or the ART Foundation, as these are tested against various forms of attack. Additionally, it is advisable to lock the bike in well-lit, high-traffic areas and to use both locks effectively to secure the frame and wheels. By following these recommendations, cyclists can significantly enhance their bike’s security and reduce the likelihood of theft.
What Key Features Should You Consider When Choosing a Backup Bicycle Lock?
When selecting the best backup bicycle lock, several key features should be taken into account to ensure your bike’s security.
- 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 typically more secure due to their hardened steel construction, while chain locks offer flexibility in securing multiple parts of the bike.
- Size and Weight: The size and weight of the lock are important for portability. A heavier lock may provide better security, but it can also be cumbersome to carry; therefore, finding a balance that suits your commuting needs is essential.
- Security Rating: Look for locks that come with security ratings from organizations like Sold Secure or ART. These ratings indicate the durability and resistance of the lock against tampering, which can help in choosing a lock that provides optimal security for your bike.
- Locking Mechanism: The complexity of the locking mechanism can influence how easily it can be picked or cut. Look for locks with advanced locking mechanisms, such as disc detainer systems, which are harder to defeat compared to standard key or combination locks.
- Price: While it can be tempting to opt for a cheaper lock, investing in a higher-quality lock often pays off in terms of security. Consider your budget but remember that a more expensive lock may provide better protection and peace of mind.
- Durability: The materials used in the lock’s construction should resist weather elements and physical attacks. Locks made from hardened steel or those with protective coatings against rust and corrosion will last longer and retain their effectiveness over time.
- Ease of Use: A user-friendly lock that is easy to secure and release can save you time and hassle. Consider features like keyless entry systems or locks that can be easily manipulated with one hand when parking your bike.
How Does the Locking Mechanism Influence Security?
- Keyed Locks: These locks require a physical key to open, making them less vulnerable to unauthorized access if the key is kept secure. However, the risk exists if the key is lost or if someone duplicates it.
- Combination Locks: These locks use a numerical code that must be input to unlock, eliminating the need for a physical key. They can be convenient, but they are susceptible to being cracked through brute force or by guessing combinations if not designed with high complexity.
- U-Locks: Known for their sturdy design, U-locks have a rigid frame that makes them difficult to cut or pry open. The locking mechanism is often a hardened steel shackle which provides a high level of security against many common theft methods.
- Chain Locks: These consist of a chain with a locking mechanism and are versatile because they can secure the bike to various objects. However, the level of security greatly depends on the thickness of the chain and the quality of the lock used, as thinner chains can be cut more easily.
- Foldable Locks: These locks consist of several linked segments that can be folded for easy transport. They offer a balance between portability and security, but the locking mechanism must be robust to withstand tampering.
- Smart Locks: Utilizing technology, these locks can be accessed via smartphones or key fobs, offering convenience and additional features like tracking and alerts. However, they may be susceptible to hacking or battery failure, which can pose a security risk.
- Disc Locks: These locks feature a circular design that makes them resistant to cutting and leverage attacks. The locking mechanism often includes a unique keyway, which adds an extra layer of difficulty for potential thieves.
What Materials Provide Optimal Durability and Protection?
The best backup bicycle locks are made from materials that ensure optimal durability and protection against theft.
- High-Grade Steel: This material is renowned for its strength and resistance to cutting and sawing. Locks made from high-grade steel can withstand significant force, making them a popular choice for securing bicycles in urban environments.
- Hardened Steel: A step above standard steel, hardened steel undergoes a special heat treatment process that increases its toughness and resistance to common theft tools. This added durability makes hardened steel locks less likely to be compromised in a theft attempt.
- Aluminum Alloy: While lighter than steel, high-quality aluminum alloys can still provide decent security when used in lock mechanisms. They resist corrosion and are often used in combination with other materials to create a lightweight yet sturdy locking solution.
- Polymer Coatings: Many locks feature a protective polymer coating that not only enhances grip but also protects the lock from scratches and environmental wear. This coating can add longevity to the lock and prevent rusting, especially in harsh weather conditions.
- Reinforced Locking Mechanisms: Locks equipped with reinforced mechanisms often use advanced materials and designs to prevent picking and drilling. These mechanisms add an extra layer of security, ensuring that even if the lock material is strong, the locking system is equally robust.
Which Types of Backup Bicycle Locks Are the Most Effective?
The most effective types of backup bicycle locks include:
- U-Locks: Known for their sturdy design, U-locks provide a high level of security against cutting and leverage attacks.
- Chain Locks: These locks offer flexibility in locking your bike to various objects while still providing a strong deterrent against theft.
- Folding Locks: Combining portability with solid security, folding locks can be adjusted to fit different locking scenarios while being more compact than chain locks.
- Cable Locks: While less secure than other types, cable locks are lightweight and can be used as a secondary lock for securing wheels or components.
- Smart Locks: These high-tech locks offer features like smartphone connectivity and tracking, adding convenience along with security.
U-locks are made from hardened steel and are highly resistant to cutting tools, making them a popular choice for cyclists in urban environments. Their shape allows them to fit snugly around the bike frame and an immovable object, reducing the risk of leverage attacks.
Chain locks consist of heavy-duty links that provide flexibility in securing your bicycle. They can be wrapped around various objects, which makes them adaptable, although they can be heavier to carry compared to U-locks.
Folding locks feature interlocking plates that can be folded into a compact shape, making them easy to carry. They are also versatile in how they can be attached, providing a good balance between portability and security.
Cable locks are made from braided steel cables and are lighter than other options, making them easy to transport. However, they are generally less secure and are best used as secondary locks for added protection to components like wheels.
Smart locks utilize modern technology to enhance security features, such as keyless entry and GPS tracking. They can be controlled via mobile apps, offering convenience, but they may be vulnerable to hacking and require battery power to function.
Which U-Locks Offer the Best Security for Your Bike?
The best backup bicycle locks provide additional security and peace of mind, especially when used alongside a primary lock.
- Abus Granit XPlus 540: This U-lock is known for its high-security features, including a hardened steel shackle and a double-locking mechanism.
- Kryptonite New York Fahgettaboudit Mini: Renowned for its durability, this lock features a 18mm hardened steel shackle which makes it extremely difficult for thieves to cut through.
- OnGuard Brute STD: This lock is favored for its affordability and robust build, offering a solid shackle and high-security rating against picking and drilling.
- Hiplok D1000: This lock not only provides excellent security but is also wearable, making it convenient for cyclists who want a mobile locking solution.
- ABUS Bordo Granit XPlus 6500: Combining the flexibility of a folding lock with the security of a U-lock, this option is easy to transport and offers a high level of resistance to cutting tools.
The Abus Granit XPlus 540 is a top-tier option for those seeking maximum security, featuring a hardened steel construction that resists cutting and a unique locking mechanism that protects against picking. It’s compact yet robust, making it ideal for urban cycling.
The Kryptonite New York Fahgettaboudit Mini is a favorite among cyclists in high-theft areas, as its 18mm shackle is resistant to bolt cutters. Its compact size also offers convenience, allowing for easy transport while still providing excellent security.
The OnGuard Brute STD stands out for its combination of strength and affordability. With a solid shackle and a security rating that holds up against various attack methods, it provides good value for those looking for a reliable backup option.
The Hiplok D1000 is unique because it allows users to wear the lock while riding, thanks to its adjustable strap design. This feature makes it a great choice for cyclists who want to avoid carrying additional gear while ensuring their bike remains secure.
The ABUS Bordo Granit XPlus 6500 offers a versatile locking solution with its folding design, making it easy to store and transport. It balances flexibility and security, providing a high level of protection against theft while being user-friendly for everyday use.
What Advantages Do Folding Locks Provide Over Traditional Options?
Folding locks offer several advantages over traditional bicycle locks, making them an excellent choice for securing your bike.
- Portability: Folding locks are generally lightweight and compact, allowing for easy transport. They can often be folded into a small size that can be conveniently attached to a bike frame or stored in a bag.
- Flexibility: These locks can be configured in various ways to secure your bike to different objects, providing versatility that traditional U-locks often lack. Their ability to wrap around various shapes and sizes allows for more creative locking options.
- Security: Many folding locks feature hardened steel links and advanced locking mechanisms, offering a high level of security against cutting and tampering. They typically provide a balance between weight and security, making them suitable for urban environments.
- Ease of Use: Folding locks usually come with a quick-release mechanism, making them easy to deploy and secure. This convenience enhances the user experience, especially when you’re in a hurry or need to lock your bike frequently.
- Aesthetic Appeal: Folding locks often have a sleek and modern design, which can be more visually appealing compared to bulky traditional locks. This aesthetic can be a significant factor for cyclists who value style in their accessories.
How Do Chain Locks Compare in Terms of Security and Portability?
| Aspect | Chain Lock A | Chain Lock B |
|---|---|---|
| Security | High security level with hardened links; resistant to bolt cutters. | Moderate security; better than cable locks but can be compromised with tools. |
| Portability | Heavier and bulkier; may be challenging to carry on long rides. | Lightweight design; easier to transport but offers less protection. |
| Price | Higher price point reflecting premium materials. | More affordable, suitable for budget-conscious buyers. |
| Durability | Designed for long-term use; highly weather-resistant. | Moderately durable; may wear down quicker under harsh conditions. |
| Length Options | Available in multiple lengths; versatile for different locking scenarios. | Limited length options; best for standard locking needs. |
| User Ratings | Highly rated by users for security and reliability. | Mixed reviews; appreciated for portability but criticized for lower security. |
What Are the Top Brands Known for Reliable Backup Bicycle Locks?
The top brands known for reliable backup bicycle locks include:
- Abus: Abus is renowned for its high-quality security products, particularly its bicycle locks which are often praised for their durability and resistance to picking and cutting. Their locks come in various styles, including chain, U-locks, and folding locks, catering to different preferences and security needs.
- Kryptonite: Kryptonite has a long-standing reputation in the cycling community for producing some of the most robust and secure bike locks available. Their U-locks and chain locks are particularly popular, featuring reinforced materials and advanced locking mechanisms to deter theft effectively.
- OnGuard: OnGuard offers a wide range of bicycle locks that balance security and affordability, making them a favorite among casual riders and commuters. Their products often include features like double-bolt locking mechanisms and durable materials, ensuring a good level of protection for your bike.
- Hiplok: Hiplok specializes in wearable bike locks, which provide innovative solutions for cyclists who want to carry their locks without added bulk. Their locks are designed to be worn as a belt or strapped to the waist, ensuring convenience while providing a decent level of security.
- ABUS Bordo: The ABUS Bordo series features portable folding locks that are compact yet offer substantial security. Made from high-quality materials, these locks can be easily transported and deployed, providing a versatile option for urban cyclists looking for a backup lock.
How Can You Maximize the Security of Your Bicycle Lock?
To maximize the security of your bicycle lock, consider various types of locks and strategies for optimal protection.
- U-Locks: U-locks are known for their strength and resistance to cutting and leverage attacks. Their rigid shape makes it difficult for thieves to use tools to pry open or twist the lock.
- Chain Locks: Chain locks offer flexibility in securing your bicycle to various objects, and when made from hardened steel, they can provide a high level of resistance to cutting. It’s important to choose a thick chain to deter thieves, as thinner chains can be more easily compromised.
- Folding Locks: Folding locks are a versatile option that combines the portability of a cable lock with the strength of a U-lock. They can be easily carried and offer multiple locking configurations, making them suitable for securing both the frame and wheels of the bike.
- Additional Locking Mechanisms: Using multiple locks increases security, as thieves may not have the time or tools to overcome more than one type of lock. Combining different lock styles, such as a U-lock with a chain lock, can deter opportunistic theft.
- Locking Techniques: Properly lock your bicycle by securing both the frame and the wheels to a solid, immovable object. Avoid leaving any gaps that could allow tools to fit through, and make sure the lock is positioned in a way that minimizes leverage points.
- Location Selection: Choose a well-lit, busy area to park your bicycle, as thieves are less likely to target bikes in public spaces where they can be easily seen. Additionally, using designated bike racks or areas can offer extra safety against theft.