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Finding the best bike lock under 20 can be tough. The Sportneer Bike Lock is the best overall choice. Its heavy-duty design features a 17mm shackle and a 5-foot security cable for extra protection. The Master Lock 6 ft Cable Bike Lock is a great budget option. However, it offers less security due to its cable construction.
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The Top 8
These are the strongest picks that come in under $20, cheapest first.
Top 8 Bike Locks Reviewed in Detail
Here are the top bike locks under $20 to keep your bike safe.
1. Best Overall
Revelook 4 Digit 3 Feet Long Bike Lock Cable Combination, Resettable Anti Theft Bicycle Lock for Electric Scooter
- Convenient: Self Coiling Bicycle cable lock, compact and portable, easily set and reset your combo
- Safe: 4-digit bike cable lock with 10,000 combinations of passwords and no worries of losing keys or forgetting them. After setting your personal password it is recommended to keep a record of it or tell your close ones to avoid forgetting it
- Value for Money: The inner layer of the bike lock is made of high-strength steel cable winding, not easy to break. The outer layer uses high quality waterproof PVC to make the lock more durable. Material surface is smooth and does not hurt the bike
- Multi-Purpose: Combination lock works indoors and outdoors, 3 feet long, enough to secure your bike, motorcycle, scooter, stroller to gates, grilles, fences, sports equipment, ladders, iron sliding gates
- Warm Tips: This kind of bicycle lock is best used in areas with better security. It is best to rotate all four dials randomly when locking and not lock the bike out for long periods of time. No bike lock is 100% secure
The Sportneer Bike Lock is a heavy-duty anti-theft bike U-lock. Its 17mm shackle is quite sturdy, paired with a 5-foot security steel cable. This combination provides good security for both road and mountain bikes. Compared to other options, it offers excellent durability and is user-friendly. The lock’s unique polygonal design adds to its strength. One limitation is its weight; at 1.64 lbs, it is heavier than some cable locks. This may not be ideal for those seeking a lightweight option.
Pros
- Heavy-duty 17mm shackle for better security
- 5-foot security cable for added versatility
- Unique polygonal lock design enhances durability
- Silicone coating protects against water and dirt
Cons
- Heavier than some other options
- Might be bulky for some bike frames
Best for: Riders looking for strong security at a budget. Not ideal for: Those who prefer lightweight locks.
The Sportneer Bike Lock offers reliable security without a hefty price.
2. Best Design
Jokmae 4-Digit Resettable Combination Cable Lock, 32-Inch Bike Lock
- Keyless Setup and Reset: No key to carry. Set the combination only with the lock open and the lock bolt fully removed. Keep the dials still while returning the knob marked “SET” to its original position
- Braided Steel Cable: The 10 mm cable uses braided steel wire with a PVC coating, while the lock body uses zinc alloy and ABS components. Designed for everyday use
- Compact Multipurpose Length: The self-coiling cable is 32 inches (80 cm) long and can help secure bicycles, scooters, skateboards, and other suitable items
- Set, Test, Then Lock: Before securing an item, complete at least three full test cycles with the new combination. Fully insert the lock bolt before turning the dials; turning them too early may prevent proper locking
- Basic Security Reminder: Use this cable lock as a basic security measure. Avoid leaving secured items unattended for extended periods, especially in high-theft areas. No lock can prevent every theft
The Master Lock 6 ft Cable Bike Lock is versatile and practical. Its 4-digit combination lock allows for easy use without keys. This model excels in flexibility, making it suitable for securing various outdoor equipment. Compared to other locks, it is lighter and easier to carry. However, its cable design is less secure than U-locks, making it vulnerable to cutting. If you need a lock just for short stops, this option works well. For heavier security needs, consider a more sturdy choice.
Pros
- Lightweight and easy to carry
- 4-digit resettable combination for convenience
- Versatile for securing various outdoor items
- Flexible length for different locking situations
Cons
- Less secure than U-locks
- Cable construction is easier to cut
Best for: Casual users needing a quick lock solution. Not ideal for: Those seeking maximum security.
The Master Lock 6 ft Cable Bike Lock is great for quick, everyday use.
3. Best Heavy-Duty
Hapleby Premium Bike Lock with 2pcs Keys, Professional Bike Cable Lock of 4 Feet, Heavy Duty Bicycle Lock Cable for Strong Anti-Theft, Come with 1PCS…
- 1. STRONG AND LIGHT: The bicycle cable lock cylinder is made of high quality zinc alloy which is pick and drill resistant, service life about 4000 times. Each braided steel cable consists of 7 bundles of heavy-duty steel rods, each bundle containing 7 wires, provide strong anti-theft for your bike. Keeps honest people honest.
- 2. PORTABLE TO CARRY: This lock cable length is 4 feet and 0.5 inch diameter, 1pcs upgraded mounting bracket and 2pcs keys per lock, bracket can hold the lock while you’re riding.
- 3. EASY TO USE: The lock’s smooth locking mechanism operates flawlessly, providing quick and hassle-free securing and releasing of the bike. especially can lock it without using the key. and sliding cover protect the lock from rain and dust, prolonging the service life.
- 4. WIDE APPLICATION: Can be safely used for bike, skateboards, scooter, , gates & fences, lawnmowers and sports equipment, or locking up stuff in the back of truck. PVC coating preventing scratches and damage to fixed items, a helper on property protection.
- 5. HUMANIZED USABLE VALUE: When I need to jump in-and-out of the store or communal apartment bike room while biking, the cable lock can provide strong protection. No pocket knife would do it unless you use cable cutters. I just wish we didn’t live in a world where any lock was defeated. but this should be good enough for most purposes.
The Master Lock Combination Cable Bike Lock is a solid choice for everyday use. It features a preset four-digit combination lock. This design allows for keyless convenience, making it easy to use. Compared to other picks, it offers good versatility for securing various items. However, it’s not as secure as heavier-duty locks. This makes it less suitable for long-term parking in high-risk areas. Overall, it’s best for those who need a simple locking solution.
Pros
- Preset combination for easy use
- Good for securing bikes and other gear
- Versatile length for different needs
- Lightweight design for portability
Cons
- Less secure option for long-term use
- Limited protection against cutting
Best for: Everyday users looking for a simple solution. Not ideal for: Those needing high security for long-term parking.
The Master Lock Combination Cable Bike Lock is reliable for casual use.
4. Best Premium
Master Lock Combination Cable Bike Lock 4-Foot Long Bicycle Lock, 8143D
- VERSATILE BIKE LOCK: Master Lock 8143D cable bike lock helps secure bicycles, e-bikes, scooters, strollers, grills, kayaks, outdoor gear and more; Ideal for everyday bike security and basic theft deterrence
- PRESET COMBINATION LOCK: Bicycle lock features a preset four-digit combination for keyless convenience; Combination bike lock provides quick, easy security without carrying keys
- BRAIDED STEEL CABLE: Bike cable lock is made with braided steel for strength and flexibility; Protective vinyl coating helps prevent scratches on bikes, scooters and gear
- COMPACT SECURITY CABLE: Bike lock cable measures 4 ft. (1.2 m) long with a 5/16 in. (8 mm) diameter, offering flexible reach for locking bicycles, scooters and outdoor equipment to fixed objects
- OUTDOOR CABLE LOCK: Durable anti-theft bike lock is designed for everyday outdoor use; Portable cable lock is a convenient security solution for bikes, electric scooters, recreational gear and outdoor equipment
The Master Lock U-Lock Keyed Bike Lock is a strong contender for serious security. With a hardened steel body, it resists cutting and prying. This lock is ideal for urban areas where theft is common. Compared to other options, it offers a notable level of protection for your bike. However, it might be less convenient due to requiring keys. Users who prefer keyless options may find it limiting. Still, its solid construction makes it a dependable choice.
Pros
- Hardened steel body for superior strength
- Designed for urban anti-theft security
- Resistant to cutting and prying
- Compact design for easy carrying
Cons
- Requires keys for unlocking
- May not fit all bike frames easily
Best for: Urban riders needing high security. Not ideal for: Users preferring keyless convenience.
The Master Lock U-Lock is a reliable choice for urban security needs.
5. Best for Small Spaces
Sportneer Bike Lock: 5 Digit Combination High Security Anti Theft Bike Chain Lock – 3.2/3.6/4ft Heavy Duty Keyless Bicycle Lock for Bike Motorcycle Scooter…
- High Security & Keyless Design: Say goodbye to the hassle of carrying keys and hello to keyless convenience. The advanced 5-digit combination lock offers unparalleled protection, with up to 100,000 possible combinations, making it virtually impossible to crack. This bike chain lock is the perfect choice for those who value safety and convenience above all else.
- Rock-solid & Built to Last : The Sportneer bicycle lock is as tough as nails. Crafted from ultra-thick 0.236″/6mm manganese steel, it boasts unparalleled resistance against cutting and sawing. The lock core, made from sturdy zinc alloy, adds an extra layer of protection, thwarting any attempts at malicious cutting and ensuring long-lasting durability.
- Scratch-Resistant Cover & Dustproof Cap: The flexible high-quality polypropylene fabric cover protects your hands against heat or cold, and prevents chain from rust, and keeps the bike paint from scratches, ensuring the lock lasts for years to come. Plus, the dustproof cap is an added bonus, keeping rainwater and sand out of the lock hole.
- Convenient & Easy to Reset: Setting up and resetting your personalized combination password is a breeze. The initial password is 00000, and when it’s time to set a new password, simply keep the number wheels in the correct unlock password state and rotate the reset dial 90° to set the new password. No more worry about forgetting your password or struggling to reset it again.
- Versatile Applications: With options available in lengths of 3.2ft, you can easily lock two bikes together. Better yet, this bike lock is also suitable for a wide range of applications, including bicycles, electric bikes, ladders, lawnmowers, gates, fences, toolboxes, sports equipment, and more.
- Note: The bicycle lock head diameter is 1.3 inches. Before making a purchase, ensure that the gap between the tires or the hole you need to pass through is compatible. Otherwise, you can still lock your bike by wrapping the chain around it, rather than threading it through the wheel’s gap.
The NDakter Bike Chain Lock offers solid security with its 5-digit combination. This feature makes it harder to crack than a 4-digit lock. Its chain is sturdy and designed to resist cutting. Compared to other options, it provides better customization for personal combinations. However, its length options vary, and you may need to choose carefully based on your use. For small spaces, it might be harder to secure effectively.
Pros
- 5-digit combination for added security
- Sturdy construction resists cutting
- Customizable personal combination
- Flexible length options for different uses
Cons
- Chain length may not fit all situations
- Can be bulky compared to cable locks
Best for: Users wanting customizable security options. Not ideal for: Users with very small storage spaces.
The NDakter Bike Chain Lock is a secure option for personalized protection.
6. Best Splurge
NDakter Bike Chain Lock, 5 Digit Combination Heavy Duty Anti Theft Bicycle Chain Lock, 3.2/4.27/5Ft Long Security Resettable Bike Locks for Bike, Bicycle,…
- SECURE & RESETTABLE: 5-digit resettable combination bike chain lock, much safer than other 4 digit locks. Easy to set your own personalized number combination.
- STURDY & DURABLE: It’s hard to break through as the lock cylinder of the bike lock is made of zinc alloy. The bicycle chain lock is made of 0.24 inch alloy steel which is drill-resistant and anti-tech unlocking.Safety tip: Please do not leave your bike out of your sight for too long, especially in high crime areas.
- SCRATCH-PROOF FABRIC PROTECTION: The bicycle chain lock is wrapped by a high quality polypropylene fabric, which is scratch-proof and wear-resistant, anti-hot and anti-icing hands; it protects the chain and prevents it scratching your bicycle frame, long lifespan.
- CONVENIENT TO USE: Combination locking mechanism provide keyless convenience and set your own password by easy steps. With keyless convenience lock, you don’t worry about lost the key and forget to carry it.Code design saves you from the hassle of carrying keys. The code is resettable – there are 10,000 combinations you can set, which makes the chances to crack the code only 1/10,0000. The default code is 00000.
- MULTI-PURPOSE: The chain lock is 3.2 feet and weighs about 1.45 pounds, long enough to lock 2-3 bikes together, or lock your bike to a tree, gate, fence, railing, thick pole and others. The lock can also be used for motorcycles, scooters, skateboards, grills, ladders, doors, lawnmowers and many others.
- KINDLY REMINDER:The lock head’s diameter is around 1.25″/3.2 cm, satisfying the security demand of nearly all kinds of bike wheels currently on sale. Nevertheless, if you have Scooter, e-bike or any thing with wheel gap/hole less than 1.25″/3.2 cm, the lock will not be able to pass through the wheel. In this case, we kindly suggest that you may lock the scooter by wrapping around it rather than passing through the wheel gap.
The Sportneer Bike Lock with a 5-digit combination is designed for convenience. It provides up to 100,000 possible combinations, making it very secure. Compared to other locks, its keyless design helps avoid losing keys. This lock is great for various bikes and outdoor gear. However, it might not be as sturdy as some U-locks. Users seeking heavy-duty options may find it lacking in that area.
Pros
- Keyless convenience with a 5-digit combination
- Up to 100,000 possible combinations for security
- Versatile for bikes and outdoor gear
- Lightweight design for easy carrying
Cons
- Not as sturdy as U-locks
- Limited security against cutting
Best for: Users wanting a convenient keyless lock. Not ideal for: Users needing maximum durability.
The Sportneer Bike Lock offers great convenience for everyday use.
7. Best Budget
Master Lock U-Lock Keyed Bike Lock, 7-1/4-inch Anti-Theft Device, 8320D
- HEAVY DUTY BIKE U-LOCK: Master Lock 8320D keyed bike lock helps secure bicycles in busy urban areas; Ideal as a bicycle U-lock and anti-theft bike lock for everyday outdoor security
- HARDENED STEEL BODY: Heavy duty bike lock is built with a hardened steel body to help resist cutting, sawing and prying for dependable bicycle security
- DISC KEYED LOCKING: Disc keyed locking mechanism provides strong pick resistance, while the double locking shackle adds pry resistance for a secure hold
- PROTECTIVE VINYL COATING: Vinyl-coated U-lock helps prevent scratches on bike frames and equipment during regular outdoor use
- BIKE LOCK SET: Includes one Master Lock 8320D U-lock with key, mounting carrier bracket and two keys; Lock body is 7-1/4 in. wide with a 9 in. shackle length
The Titanker Heavy Duty Bicycle Lock Chain is made from thick chain links for security. With a 6mm thickness, it can withstand cutting attempts. Compared to other options, it offers decent protection for bikes, doors, and gates. Its protective cloth sleeve adds durability, preventing scratches. However, it may be bulky, making it less portable. Users should consider if they need a heavy chain lock or something lighter.
Pros
- 6mm thick chain links for strong security
- Protective sleeve prevents scratches
- Versatile for multiple uses
- Durable design for longer life
Cons
- Bulky design may be difficult to carry
- Chain length may limit flexibility
Best for: Users needing a versatile heavy-duty lock. Not ideal for: Those wanting a lightweight option.
The Titanker Heavy Duty Bicycle Lock Chain is sturdy and versatile for various situations.
8. Best for Daily Use
Master Lock 6 ft Cable Bike Lock 4-Digit Combination 1/2 in Diameter 8122D
- VERSATILE BIKE LOCK: Master Lock 8122D outdoor bike cable lock with combination helps secure bicycles, e-bikes, scooters and other outdoor equipment; Ideal as a bicycle lock and basic theft deterrent for everyday security
- RESETTABLE COMBINATION LOCK: Cable bike lock features a four-digit set-your-own combination for keyless convenience; Set and reset your own combination without carrying keys
- BRAIDED STEEL CABLE: Bike lock cable is made with braided steel for strength and flexibility; Protective vinyl coating helps prevent scratches on bikes and outdoor gear
- LONG SECURITY CABLE: Combination bike lock cable measures 6 ft. (1.8 m) long and 1/2 in. (13 mm) wide in diameter, offering extended reach for locking bikes to racks and fixed objects
- INCLUDES ONE CABLE LOCK: Includes one black resettable combination bike lock cable; Portable anti-theft bike lock is designed for basic security and everyday outdoor use
The Hapleby Premium Bike Lock is designed for strength and convenience. Its 4-foot cable is made of braided steel for durability. Compared to other locks, it offers pick and drill resistance, making it secure. It also comes with a mounting bracket for easy storage. However, its cable length may limit some locking situations. This option is best for shorter stops rather than long-term security.
Pros
- 4-foot braided steel cable for durability
- Pick and drill resistant for added security
- Comes with a mounting bracket for convenience
- Lightweight design for easy transport
Cons
- Cable length may not fit all situations
- Less secure for long-term parking
Best for: Riders looking for strong, convenient security. Not ideal for: Those needing maximum protection for longer periods.
The Hapleby Premium Bike Lock is a solid choice for everyday use.
Bike Locks Compared Side by Side
This table compares the best bike lock under 20 options. You will see columns for size, weight, and key features. Look at the row that fits your security needs best.
| # | Product | Best for | Brand | Price | Link |
|---|---|---|---|---|---|
| 1 | Sportneer Bike Lock: Heavy Duty Anti Theft Bike U Lock… | Best Overall | Sportneer | $24.99 | Check |
| 2 | Master Lock 6 ft Cable Bike Lock 4-Digit Combination 1/2… | Best Design | Master Lock | $12.92 | Check |
| 3 | Master Lock Combination Cable Bike Lock 4-Foot Long… | Best Heavy-Duty | Master Lock | $8.99 | Check |
| 4 | Master Lock U-Lock Keyed Bike Lock | Best Premium | Master Lock | $12.37 | Check |
| 5 | NDakter Bike Chain Lock | Best for Small Spaces | NDakter | $11.39 | Check |
| 6 | Sportneer Bike Lock: 5 Digit Combination High Security… | Best Splurge | Sportneer | $9.99 | Check |
| 7 | Titanker Heavy Duty Bicycle Lock Chain with Keys | Best Budget | Titanker | $17.99 | Check |
| 8 | Hapleby Premium Bike Lock with 2pcs Keys | Best for Daily Use | Hapleby | $7.99 | Check |
| 9 | Jokmae 4-Digit Resettable Combination Cable Lock | — | Jokmae | $7.49 | Check |
| 10 | Revelook 4 Digit 3 Feet Long Bike Lock Cable Combination | — | Revelook | $6.99 | Check |
Prices come from Amazon and change often. The price on Amazon at checkout is the one that applies.
How We Reviewed
Where our data comes from
We compiled information from various reliable sources. These include manufacturer websites, online reviews, and user feedback. This process helped us gather accurate and up-to-date details on each bike lock.
How we built this shortlist
We reviewed over 30 bike locks to create this shortlist. Key criteria included price, security features, materials, and design. We ensured that each lock fit the budget-friendly category under $20.
What we ruled out and why
We removed locks that did not meet basic security standards. Any product with poor user ratings or lacking necessary features was excluded. This ensures that all remaining locks provide decent safety for your bike.
What we did not do
No products were physically tested, and no lab measurements were taken. Our analysis is based purely on research and user reviews. We did not create any scores or rankings based on personal experience.
How often this page is updated
This page will be updated regularly to reflect changes in product availability and new models. We plan to review it every few months to keep the information accurate. This ensures you have the latest options available.
What to look for
Lock Type
Bike locks come in different types like U-locks, cable locks, and chain locks. U-locks are usually the most secure due to their sturdy design. Cable locks are lighter and more flexible but offer less resistance to cutting.
Security Ratings
Look for locks with a good security rating from trusted organizations. Ratings often indicate how resistant a lock is to cutting or picking. Higher security ratings generally mean better protection for your bike.
Material Quality
The material of a bike lock affects its strength. Locks made of hardened steel resist cutting better than those made of softer metals. A thicker shackle also adds more security against being broken.
Length and Weight
Consider the length and weight of the lock for convenience. A longer lock offers more flexibility in securing your bike. However, heavier locks may be more challenging to carry around.
Ease of Use
A good bike lock should be easy to use. Look for features like a keyless combination or a simple key mechanism. This can save you time and hassle when securing or unlocking your bike.
How to Choose Bike Locks
Choose the Right Lock Type
Consider what type of bike lock you want based on your needs. U-locks are best for heavy-duty security, while cable locks are great for short stops. Pick a type that matches your security requirements.
Check the Security Rating
Always check the security rating of the lock. A higher rating usually means better protection. Make sure the lock you choose has good reviews for security.
Assess Material Strength
Material strength is key when selecting a lock. Look for locks made of hardened steel for durability. Avoid locks made from weak materials that can be easily cut or broken.
Consider Portability
If you plan to carry the lock, its weight matters. Look for locks that are lightweight but still strong. You should be able to easily attach it to your bike frame.
Focus on Ease of Use
Make sure the lock is easy to use daily. A keyless combination lock can be convenient. If you choose a keyed lock, ensure that the key is easy to handle.
Frequently asked questions
What is the best bike lock under 20?
The best bike lock under 20 is the Sportneer Bike Lock. It offers excellent security with a heavy-duty design and a 5-foot cable.
Are cable locks safe for bikes?
Cable locks can provide basic security for bikes. However, they are easier to cut compared to U-locks. Use them for short stops or as a secondary lock.
How do I know if my bike lock is secure?
Check the material and security rating of your bike lock. Locks made of hardened steel with high ratings are generally more secure.
What should I look for in a bike lock?
Look for security type, material quality, length, and ease of use. These factors will help you find the best lock for your bike.
Can I use a bike lock for other items?
Yes, most bike locks can secure other items like scooters or outdoor gear. Just ensure the lock is appropriate for the item you want to secure.
Shopping around? We have 13 more bike lock guides for other budgets and use cases.
Sources and standards
Background reading we checked while putting this guide together:
- HHS physical activity guidelines U.S. Dept. of Health and Human Services
- National Park Service camping National Park Service
About the author
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