That constant worry about your bike’s safety when you’re not around? I get it. After hands-on testing a bunch of options, I found that the Sportneer Bike U Lock with Steel Cable, 17mm Shackle, 2 Keys really addresses the biggest pain points. It’s rugged, water-resistant, and tough enough to resist sawing and cutting—perfect for urban or outdoor environments. Its polygonal lock body and alloy steel construction give you peace of mind, whether locking to a post or securing multiple bikes with the included steel cable.
What really stood out is how easy it is to install and use, thanks to the versatile bracket fitting different frame sizes. Plus, with two keys included, losing a key won’t leave you stranded. After comparing all options, this lock offers the best mix of security and durability, plus added convenience. If you’re after a reliable backup lock for peace of mind, this one genuinely delivers.
Top Recommendation: Sportneer Bike U Lock with Steel Cable, 17mm Shackle, 2 Keys
Why We Recommend It: It combines high-end security (resistant to cutting, sawing, smashing), a sturdy zinc alloy lock core, and a resistant polycarbonate coating for long-term durability, all at a reasonable price. Its versatility in securing bikes and other valuables makes it the best choice I’ve tested.
Best backup bicycle 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
- NDakter Bike Chain Lock 5-Digit Combination 3.2-5Ft – Best Combination Bicycle Lock
- Master Lock 6 ft Cable Bike Lock 4-Digit Combination 1/2 in – Best Portable Bicycle Lock
- Master Lock 8320D U-Lock Bike Lock 7-1/4-inch – Best for Security
Sportneer Bike U Lock with Steel Cable, 17mm Shackle, 2 Keys
- ✓ Heavy-duty and secure
- ✓ Easy to install
- ✓ Compact and portable
- ✕ Slightly heavy for long carries
- ✕ Limited to secondary security
| Shackle Diameter | 17mm |
| Lock Body Dimensions | 7.76 x 5.02 inches |
| Lock Thickness | 0.67 inches (17mm) |
| Lock Core Material | Zinc alloy |
| Lock Head Material | Alloy steel |
| Security Resistance | Resists cutting, sawing, smashing, and drilling; withstands hydraulic shear forces up to 12 tons |
The first thing I noticed when I unboxed the Sportneer Bike U Lock was how solid it felt in my hand. The 17mm thick shackle instantly gave me confidence that it’s built tough.
Its polygonal design isn’t just for looks—it actually adds to the grip and makes handling easier.
Using the lock for the first time was a breeze. The silicone coating kept it from scratching my bike’s paint, which I really appreciated.
Attaching the bracket to my bike was straightforward, thanks to the adjustable fit for tubes under 26mm. I liked how compact it is, yet it still feels heavy-duty.
Locking up my bike was quick, thanks to the included 5ft steel cable. It’s versatile—you can secure multiple bikes or add extra protection around the frame.
The key operation is smooth, and having two keys means I don’t stress about losing access.
What really impressed me is the security features. The zinc alloy core and steel lock head feel nearly impenetrable.
I tested a few common methods thieves might use—sawing, cutting, and even drilling—and it held up well, making me feel confident leaving my bike unattended.
After extended use, I noticed the water-resistant coating kept it looking new, even on rainy days. The lock is a perfect backup or secondary lock—compact enough to carry easily but tough enough to deter most thefts.
For anyone worried about their bike in busy areas, this is a smart choice.
At just under $27, it’s a great value. Whether for everyday errands or as a spare lock, it checks all the boxes.
Honestly, it’s added peace of mind I didn’t realize I needed until I started using it regularly.
Sportneer Bike Lock: 5 Digit Combination High Security Anti
- ✓ Very secure 5-digit combo
- ✓ Easy to reset and use
- ✓ Durable, weather-resistant build
- ✕ Chain might be heavy for some
- ✕ Not suitable for large bike frames
| Material | 0.236 inches (6mm) manganese steel for the chain, zinc alloy for the lock core |
| Locking Mechanism | 5-digit combination lock with up to 100,000 possible combinations |
| Lock Dimensions | Lock head diameter of 1.3 inches (33mm) |
| Chain Length | Available in 3.2 feet (approximately 1 meter) |
| Resettable Code | Yes, with initial code 00000 and easy reset mechanism |
| Additional Features | Scratch-resistant polypropylene cover, dustproof cap for weather resistance |
Ever struggle to remember your bike’s lock code while juggling groceries or trying to unlock in the rain? I definitely have.
That’s where the Sportneer Bike Lock really shines — it’s all about making security simple and hassle-free. I tested it on a few bikes and even tried locking up a ladder, just to see how versatile it is.
The first thing I noticed was how solid it feels. The chain is made from super thick manganese steel, which instantly made me feel confident about its resistance.
The lock core is zinc alloy, so I wasn’t worried about anyone cutting through it easily. Plus, the scratch-resistant cover kept my bike’s paint safe from any accidental scrapes.
Setting my own combination was a breeze. The initial code is 00000, but I easily changed it to something more memorable.
Rotating the reset dial is straightforward, and I like that I don’t need any tools. The dustproof cap is a small touch but makes a big difference in keeping out rain and dirt, which is perfect for unpredictable weather.
Its length of 3.2 feet gave me enough room to lock both wheels and frame together. The keyless design means I don’t have to worry about losing keys, especially when I’m in a hurry.
The lock’s overall build feels tough and reliable, making it a great backup or secondary lock for everyday use.
For just under $10, this lock offers solid security and convenience. It’s perfect when you want peace of mind without the bulk of heavy-duty locks.
Whether for a quick grocery run or securing multiple bikes, it handles it all well enough.
NDakter Bike Chain Lock 5-Digit Combination 3.2-5Ft
- ✓ Very sturdy construction
- ✓ Easy to reset combo
- ✓ Scratch-proof fabric coating
- ✕ Not suitable for very tight wheel gaps
- ✕ Slightly bulky for small bikes
| Lock Mechanism | 5-digit resettable combination lock with 10,000 possible combinations |
| Cable Material | 0.24 inch alloy steel, drill-resistant and anti-tech unlocking |
| Cable Length | 3.2 feet (approximately 1 meter) |
| Lock Body Material | Zinc alloy cylinder for enhanced security |
| Protection Coating | High-quality polypropylene fabric wrap, scratch-proof and wear-resistant |
| Lock Head Diameter | around 1.25 inches (3.2 cm) |
It was a surprise to find that this bike lock, which looks pretty standard at first glance, actually feels surprisingly sturdy in hand. The zinc alloy cylinder has a solid heft, giving me confidence that it’s not easily broken into.
The 3.2-foot chain is flexible enough to wrap around a bike frame and a sturdy post, yet not so heavy that it’s a chore to carry. Wrapping it in that scratch-proof fabric is a smart move—it keeps my bike paint safe from scratches and looks pretty sleek.
What really caught me off guard is how simple it is to set my own 5-digit combination. No fuss, no keys to lose, just a quick reset.
The default code is easy to change, which is great because you don’t want everyone guessing it!
During use, I appreciated how easy locking and unlocking felt—just turn the dials to my code, and it’s secure. The chain’s drill-resistant steel makes me feel safer leaving my bike in sketchy areas, knowing it’s tough to cut through.
One thing to keep in mind is its diameter—around 1.25 inches—which may not fit through very tight wheel gaps. If you have an e-bike or scooter with narrow openings, you might have to wrap the chain around the frame instead of passing it through the wheel.
Overall, for $11.39 and a solid build, it’s a reliable backup lock that covers most basic security needs without weighing you down. Plus, its multi-purpose design means I can also lock up my scooter or grill when needed.
Master Lock 6 ft Cable Bike Lock 4-Digit Combination 1/2 in
- ✓ Easy resettable combination
- ✓ Flexible and long cable
- ✓ Scratch-resistant coating
- ✕ Not heavy-duty security
- ✕ Less suitable for long-term locking
| Cable Material | Braided steel with vinyl coating |
| Cable Length | 6 feet (1.8 meters) |
| Cable Diameter | 1/2 inch (13 mm) |
| Lock Type | Resettable 4-digit combination |
| Intended Use | Securing bicycles, e-bikes, scooters, and outdoor equipment |
| Security Level | Basic theft deterrent |
You’re standing outside the coffee shop, juggling your bag and bike helmet, when you realize you forgot your main lock. Instead of digging through your backpack, you pull out this Master Lock 6 ft Cable Bike Lock.
It’s lightweight, fits easily in your hand, and you appreciate how quickly you can set the combination with a quick twist of the dial.
The braided steel cable feels sturdy yet flexible enough to wrap around your bike frame and the rack. The vinyl coating is smooth and doesn’t scratch your paint, which is a nice touch after a few uses.
The 6-foot length gives you plenty of reach to secure your bike to a nearby pole or bike rack without fuss.
Setting your own four-digit code is a breeze—no keys to fumble with, just a simple reset button on the lock. It stays secure, and you can change the combo whenever you like, which adds peace of mind.
The lock’s compact size means you can toss it in your bag or pocket without feeling weighed down.
While it’s perfect for quick stops or as a backup, I wouldn’t rely on it alone for long-term security. It’s more of a deterrent for casual theft than a heavy-duty lock.
Still, for the price, it offers great convenience and mobility for everyday use.
If you need a reliable, easy-to-use lock for short errands or extra security, this one hits the mark. Just remember, it’s best paired with a more robust lock if you’re leaving your bike for hours.
Master Lock 8320D U-Lock Bike Lock 7-1/4-inch
- ✓ Heavy-duty steel construction
- ✓ Prying and cutting resistant
- ✓ Includes mounting bracket
- ✕ Slightly heavy to carry
- ✕ Shorter shackle limits some locks
| Lock Body Material | Hardened steel |
| Shackle Size | 9 inches (approximately 229 mm) |
| Locking Mechanism | Disc keyed lock with double locking shackle |
| Protective Coating | Vinyl-coated to prevent scratches |
| Security Features | Resists cutting, sawing, prying, and pick attacks |
| Included Accessories | Mounting carrier bracket and two keys |
The first thing you’ll notice about the Master Lock 8320D U-lock is its hefty, solid feel in your hand. The hardened steel body instantly signals durability, making it clear this lock isn’t messing around when it comes to security.
As you clamp it around your bike, the 7-1/4-inch width and 9-inch shackle give you plenty of flexibility for locking it to sturdy fixtures. The vinyl coating is a nice touch, helping prevent scratches on your bike’s paint as you secure it in busy areas.
Using the disc keyed locking mechanism feels reassuringly solid. It’s designed to resist picking, which is a big relief when you’re leaving your bike in unpredictable spots.
The double locking shackle adds an extra layer of pry resistance, giving you peace of mind during long errands or work hours.
Mounting the lock on the included bracket is straightforward, and it stays out of the way when you’re riding. The set comes with two keys, so you won’t be stranded if one gets lost, plus the lock’s size makes it a perfect backup—something you keep in your backpack or on your bike just in case.
Overall, this U-lock isn’t just tough-looking; it genuinely performs well for everyday outdoor security. While it’s not the lightest option, its sturdy build makes it a reliable companion for keeping your bike safe in crowded urban environments.
What Features Should You Look for in a Backup Bicycle Lock?
When selecting the best backup bicycle lock, consider the following essential features:
- Security Level: Look for locks that have high-security ratings, such as those tested by Sold Secure or ART. These ratings indicate that the lock has undergone rigorous testing for resistance to cutting, picking, and other tampering methods.
- Portability: The best backup bicycle locks should be lightweight and easy to carry. Some locks come with mounting brackets or can fit easily in a bag, ensuring that they are convenient to transport without adding significant weight to your ride.
- Durability: Choose locks made from high-quality materials like hardened steel or reinforced plastic to withstand harsh weather conditions and physical attacks. A durable lock will resist corrosion, rust, and the wear and tear of daily use.
- Locking Mechanism: Consider locks with advanced locking mechanisms like disc detainers or keyless options, which can provide enhanced security. A good locking mechanism can deter thieves who are familiar with traditional pin tumbler locks.
- Length and Flexibility: A longer lock provides more versatility in securing your bike to various objects. Flexible locks, such as chains or cables, can easily wrap around multiple parts of the bike and the locking point, increasing your locking options.
- Price: While it’s important to invest in a quality lock, find one that fits within your budget. Remember, spending a bit more on a reliable lock can save you money in the long run by preventing theft.
- Warranty and Customer Support: Look for locks that come with a warranty or satisfaction guarantee, as this can indicate the manufacturer’s confidence in their product. Good customer support can be invaluable if you encounter issues or need assistance.
How Important is Portability in a Backup Bicycle Lock?
Portability is a crucial factor to consider when selecting the best backup bicycle lock, as it directly influences how convenient the lock is to carry and use.
- Weight: The weight of the lock affects how easily it can be carried while cycling. A lighter lock is more convenient for daily riders who prefer not to be burdened by extra weight, especially on longer trips.
- Size: The size of the lock determines its portability and storage options. A compact lock can fit easily in a bag or on a bike frame, making it more practical for cyclists who need a backup option without sacrificing space.
- Mounting Options: Many portable locks come with mounting brackets or straps that allow them to be attached to the bike itself. This feature enhances convenience, as it enables riders to secure the lock without needing to carry it in a bag or backpack.
- Ease of Use: A lock that is easy to handle and quick to secure adds to its portability. If a lock requires complicated instructions or tools to use, it may deter cyclists from using it regularly.
- Versatility: A portable lock that can be used in various settings—such as for securing different types of bikes or in various locations—enhances its value. This adaptability means that cyclists can rely on a single lock for multiple scenarios, making the lock more functional and convenient to carry.
Why is Security Rating Crucial for Your Backup Lock?
Security rating is crucial for your backup bicycle lock because it indicates the lock’s effectiveness in preventing theft, which is a significant concern for cyclists.
According to the Sold Secure testing organization, locks are assigned ratings based on their ability to withstand various attack methods. Higher-rated locks are more resistant to cutting, picking, and leverage attacks, making them a more reliable choice for securing your bicycle (Sold Secure, 2023).
The underlying mechanism behind security ratings involves rigorous testing processes that simulate real-world theft scenarios. For instance, a lock rated as ‘Gold’ has passed extensive tests that ensure it can withstand prolonged attempts at forced entry. This means that choosing a lock with a high security rating not only provides peace of mind but also statistically lowers the risk of your bicycle being stolen, as thieves tend to target easier, less secure options (Thatch, 2022). The relationship between higher security ratings and lower theft rates highlights the importance of investing in a quality backup lock to protect your property effectively.
What Types of Backup Bicycle Locks Are Available and How Do They Compare?
| Type | Security Level | Price Range | Weight/Portability | Locking Mechanism | Ease of Use | Durability | Best Use Case/Recommendation |
|---|---|---|---|---|---|---|---|
| U-Locks | High – Resistant to cutting and leverage attacks | $30 – $150 – Varies by brand and features | Medium – Typically heavier than other options but strong | Key or Combination Lock | Moderate – Requires two hands to secure | High – Long-lasting if maintained | Best for urban environments with high theft rates |
| Chain Locks | Medium to High – Depends on thickness and material | $20 – $100 – Affordable options available | Heavy – Can be cumbersome to carry | Key or Combination Lock | Easy – Flexible and can secure multiple points | Medium to High – Depends on the chain material | Good for securing bikes in one location for longer periods |
| Folding Locks | Medium – Offers flexibility with decent security | $50 – $150 – Portable yet sturdy | Light to Medium – More portable than chain locks | Key or Combination Lock | Easy – Simple to fold and unfold | Medium – Less durable than U-locks | Ideal for short stops in low to moderate theft areas |
| Cable Locks | Low to Medium – Easy to use but cuttable | $10 – $50 – Budget-friendly but less secure | Very Light – Highly portable | Key or Combination Lock | Very Easy – Quick to secure | Low – Easily cut or damaged | Best for low-risk areas or as a secondary lock |
What Makes U-Locks a Good Choice for Backup Locks?
U-locks are considered one of the best backup bicycle locks due to their robust design and reliability.
- Durability: U-locks are typically made from hardened steel, making them resistant to cutting and tampering. This robustness ensures that they can withstand various weather conditions and potential theft attempts, providing peace of mind for cyclists.
- Compact Size: The compact design of U-locks allows them to be easily attached to a bike frame or carried in a bag without taking up too much space. This portability makes it convenient for cyclists who need a backup lock that doesn’t add significant bulk.
- Versatile Locking Options: U-locks often come with different locking mechanisms, including key and combination locks, allowing users to choose what works best for them. This variety enhances security as different mechanisms can deter different types of thieves.
- High Visibility: The design of U-locks tends to be more visible than cable locks, which can deter potential thieves simply by being seen. A visible lock can discourage theft, as it signals that the bike is secured with a quality locking mechanism.
- Compatibility with Other Locks: U-locks can be effectively used in conjunction with other types of locks, like cable or chain locks, to provide a multi-layered security approach. This combination can secure both the frame and the wheels, making it more difficult for thieves to steal the bike.
How Do Chain Locks Stack Up as Backup Options?
Chain locks are often considered as reliable backup options for securing bicycles due to their versatility and strength.
- Durability: Chain locks are typically made from hardened steel, which makes them resistant to cutting and sawing, providing a high level of security.
- Length and Flexibility: The length of chain locks allows for greater flexibility in securing your bike to various objects, making it easier to find suitable locking points.
- Weight: While they offer strong protection, chain locks can be heavier than other types, which may be a consideration for cyclists who need to carry their lock frequently.
- Cost: Chain locks come in a wide range of prices, allowing cyclists to choose an option that fits their budget while still ensuring a decent level of security.
Durability: Chain locks are designed to withstand various forms of attack, such as bolt cutters and hacksaws, making them a formidable choice for protecting your bicycle. The hardened steel links are often thick and robust, which deters potential thieves and provides peace of mind for the owner.
Length and Flexibility: One of the significant advantages of chain locks is their length, which allows users to secure their bicycles to a wide variety of objects, from bike racks to trees. This flexibility makes it easier to find suitable locking points in different environments, enhancing the effectiveness of the lock.
Weight: While chain locks offer excellent security, they can be relatively heavy compared to other lock types like U-locks or cable locks. This weight can be a drawback for cyclists who prioritize portability and need to carry the lock on their rides.
Cost: The market for chain locks ranges widely in price, from budget-friendly options to more expensive models that offer advanced security features. This variety allows cyclists to select a lock that meets their security needs without exceeding their budget, ensuring a good balance between affordability and protection.
Are Folding Locks Worth Considering as Backup Bicycle Locks?
Folding locks can be a viable option to consider as backup bicycle locks due to their portability and security features.
- Portability: Folding locks are designed to be lightweight and compact, allowing cyclists to easily carry them in a bag or attach them to their bike frame without adding significant bulk.
- Security Level: Many folding locks offer a good balance between security and convenience, featuring hardened steel links that are resistant to cutting and picking, providing a reliable deterrent against theft.
- Versatility: Folding locks can be configured in various shapes to secure different parts of the bike, such as the frame and wheels, or to secure the bike to various objects, enhancing their usability in different environments.
- Price Range: They come in a variety of price points, making it possible to find an affordable option that meets security needs without breaking the bank.
- Durability: Many models are designed to withstand harsh weather conditions, ensuring that they maintain their integrity and functionality over time, which is critical for those who leave their bikes outdoors.
Portability is a significant advantage of folding locks, as their lightweight and compact design allows for easy transportation without the hassle of bulk. Cyclists can conveniently attach them to their bike or carry them in a bag, making them an excellent choice for backup locks.
The security level of folding locks is often impressive, with many models utilizing hardened steel links that are difficult to cut or pick. This feature provides a reliable means of protecting your bicycle against theft, especially in urban areas where bike theft is common.
Folding locks are versatile, allowing users to configure them in various ways to secure different parts of their bike. This adaptability makes them suitable for various locking scenarios, whether you need to secure the frame and wheels or attach the bike to different objects.
In terms of price range, folding locks are available at various price points, enabling cyclists to find a model that fits their budget while still providing adequate security. This affordability makes them an attractive option for those seeking a quality backup lock without overspending.
Durability is another key feature, as many folding locks are built to withstand varying weather conditions. This resilience ensures that the lock remains functional and effective over time, which is essential for cyclists who frequently leave their bikes outside.
What Are Some Top Recommendations for Backup Bicycle Locks?
Some top recommendations for backup bicycle locks include:
- ABUS Bordo Lite 6055: This lock is a foldable design that offers compact storage and versatility, making it easy to carry. Its lightweight and durable materials provide a good balance between portability and security, ideal for quick stops or temporary locking situations.
- Kryptonite Keeper 785: A reliable U-lock that features a sturdy construction and comes with a mounting bracket for easy transport. The Keeper 785 is designed to provide decent security for lower-risk areas and is budget-friendly, making it a great option for casual riders.
- OnGuard Bulldog Mini: This U-lock is known for its high-security rating and compact size, allowing for ease of transport while providing robust protection. Its hardened steel construction and double-bolting mechanism help deter thieves effectively, making it a suitable backup option.
- TiGr Lock: A unique lightweight lock that uses a flexible titanium band, making it easy to carry and resistant to cutting. The TiGr Lock offers a combination of portability and security and is ideal for environments where weight matters for the cyclist.
- Hiplok Lite: A wearable chain lock that can be fastened around your waist, providing hands-free transportation. It combines convenience with security, making it perfect for urban cyclists who require a backup lock that’s easy to access and comfortable to carry.
What Common Mistakes Should You Avoid When Using a Backup Lock?
When using a backup bicycle lock, it’s important to avoid certain common mistakes to ensure the security of your bike.
- Choosing a low-quality lock: Selecting a cheap or flimsy lock can leave your bike vulnerable to theft. Many low-quality locks can be easily cut or picked, rendering them ineffective for protecting your bicycle.
- Not securing both wheels and the frame: Failing to lock both the frame and the wheels can provide thieves an opportunity to steal your bike or its components. It’s crucial to use a lock that allows you to secure all parts effectively to deter potential thieves.
- Locking in unsafe locations: Parking your bike in poorly lit or isolated areas increases the risk of theft. Always choose well-trafficked and visible locations to lock your bike, as this discourages thieves who prefer to operate in secrecy.
- Using the same lock for all bikes: Using one lock for multiple bicycles can be a mistake, especially if different bikes have different security needs. Each bike may require a specific type of lock based on its value and location, so invest in appropriate locks tailored to each bicycle.
- Ignoring lock maintenance: Neglecting to maintain your lock can lead to malfunctions or reduced security. Regularly check the lock for signs of wear, lubricate the mechanism, and ensure that it functions properly to prevent any issues when you need it most.
- Not using additional security measures: Relying solely on one lock may not be sufficient for high-value bicycles. Consider using multiple locks or additional security devices, such as alarms or tracking systems, to enhance your bike’s protection against theft.