6 Best Bike Locks That Can't Be Cut for 2023

I am sure you will agree that having a bike stolen is one of the most frustrating experiences in the world! Whether it’s a road bicycle you use for daily commute or an expensive mountain bike for which you spent a fortune, it’s devastating to find your bike gone.

If you are looking for a lock that can’t be cut then it’s a herculean easy task. Even the most advanced locks can be defeated by the smartest thieves who have the right tools and ample time to spare. However, the best locks are advanced enough to make it not worth the hardship and risk.

When you have the most efficient bike lock, you significantly deter and reduce the number of thieves who can cut it. When a higher level of security is involved, it also comes with some compromise in terms of user-friendliness, weight, higher cost, and complexity.

If you live in an area with high risk of theft and you ride a really expensive bike then you need to invest in high-security and sturdy bike lock. Choosing the right one from so many options available can be perplexing for a new bike rider, so we have done the homework for you.

Our team has reviewed more than dozens of bike locks of varying capacities. We have studied, analyzed, and compared the products to help you find the best bike lock. Read on to find our unbiased reviews of the products.

Those who don’t have the time to read the reviews till the end, we recommend the Kryptonite New York Standard Heavy Duty Bicycle U Lock. Made from hardened steel and comprising of a double deadbolt, this bike lock cannot be cut with ease and they are backed by good customer reviews.

#1. Seatylock Pentagon 220 Bike U Lock

This is a heavy-duty bike lock from the house of Seatylock and it comes with Pentagonal crossbars that are made from sturdy and hardened steel over ½ inch thick. This design is much advanced, stronger, and thief-proof than any standard lock out there. With a width of 4.53 inches, it can easily fit to any bike scooter or electric bike that you can peddle or ride. The biggest USP of these locks is that they cannot be drilled, sawed, chiseled, cut, or hammered. Most of the tools used for cutting locks become useless plus the double deadbolt twist perfectly preventing any attacks.

The unique design of Pentagon 220 has made it one of the best-selling Secure Gold bike lock. It comes with an advanced anti-rattle mechanism that prevents the lock from rattling and making noise while you ride. The crossbars feature a UV-Resistant plastic coating that protects your bike frame from getting scratched. We also love the fact that the lock comes with a set of three keys, eliminating the need to remember the combinations and passwords. So, if you can’t find one key, you will always have a spare to save you!

Product features and specifications

Measures 11.8 x 4.5 x 1 inches
Made from hardened steel
Double deadbolt

Weighs 3.75 pounds
Heavy Duty Bicycle Lock
3 set of keys

UV-Resistant plastic coating
Unbreakable Cycling Accessories

User/ customer reviews

People highly appreciate the size of the lock that fits almost all types of bicycles and feels super sturdy and secure. Cyclists not only like its well-engineered construction but also the black matte finish on the outside that makes it look extremely attractive. A few users have expressed their concern with the mount that easily comes out and the clamp that is not sturdy enough to hold a lock that heavy.

Conclusion

If you have an expensive bike then you should, by all means, look for an advanced and sturdy bike lock like this one that can’t be cut by the average tools. The locks is not only well-built but also extremely attractive to look at. Overall, we feel that this is one of the strongest locks money can buy.

#2. Foldylock Clipster Folding Bike Lock

The manufacturer Seatylock takes pride in offering the world’s first-ever wearable bike lock that can be folded and clamped to the belt, or carried in a backpack or bag. Thus, it eliminates one of the biggest worries of the users in terms of finding a place to keep the lock. The lightweight of the lock hardly makes you feel you have anything there and it also saves you from the constant clanking of the metal on the bike frame. As it comes with a patented joint protection system, the bike lock is much sturdier and effective than the cheap imitation brands.

With a heavy-duty design which ensures that the lock cannot be cut, broken, or drilled, the manufacturer gives it a security rating of 14 out of 18. The lock has been put into various tests by hammering, sawing, drilling, chiseling and freezing, and every time it came out just fine. Due to its versatility, the bike lock can be used for cycles, scooters, skateboards and much more. Their hard steel links are rust-resistant and they serve perfect for long-term use. It also comes with a set of three keys and no combination locks, so there’s no risk of forgetting passwords and getting locked out from your bike.

Product features and specifications

Weighs 2.2 pounds
Anti Pick Bike Folding Lock
Three keys set

Heavy Duty Fold Bike
Rust-resistance
Versatile use

Hardened steel links
Bike frame protection
Patented joint protection system

User/ Customer reviews

People love the design of the lock which appears like a car lock and that is pretty impressive. While most people have said that the Foldylock is much easier to carry, there are others who say that it feels slightly heavy on the belt. Users have also said that the lock comes with a rubberized armor coating that protects the frame from getting scratched. Unlike the huge U-locks, these bike locks are lighter and much easier to use.

Conclusion

If you are tired of robust U-locks weight heavy on the bike frame and need a solution for this then the Foldylock Clipster comes across as a great choice. It is a compact-sized and lightweight folding bike lock that can be easily worn on your belt when not in use. Overall, we like both style and functionality.

#3. Seatylock Mason Sold Secure Gold Bicycle U-Lock

This sturdy bike lock by Seatylock finds a place in our list because it is approved by Sold Secure, a testing company-owned as well as administered by Master Locksmiths Association. The company is known for assessing its security products through rigorous tests against various quality standards. As a result, you don’t have to worry about quality. This new uniquely patented lock with triangular-shaped crossbars measures about 17mm. These U-shaped locks are super strong and provide the highest strength to weight ratio. They come in two sizes so you can choose the one that suits you best.

We are impressed to find that this Seatylock provides enhanced protection against the attacks via a drill-resistant cylinder and double-deadbolt locking mechanism. Other components are also thoughtfully chosen to add an extra layer of protection against twisting, pulling, and prying attacks. The metal components used in this lock are all rust-resistant and the shutter mechanism prevents water and debris from getting into the cylinder. The plastic cover also comes with UV protection to ensure that the lock holds up well against any adverse weather conditions.

Product features and specifications

Measures 7.1 x 3.4 x 1 inches
Weighs 2.36 pounds

Heavy Duty
Tested and approved by Sold Secure
Hardened steel links

Weather-resistant
Thick Patented Triangular Crossbar
Double Deadbolt

Drill Resistant
Mount brackets available

User/ Customer reviews

People are happy to find a lock that is sturdier, yet less bulkier, lighter and does not create a lot of sound or scratch the bike frame while riding. Users find it convenient to lock both the frame and wheel using this lock. Cyclists appreciate the sleek design of the lock which looks great and provides enhanced protection from theft in all weather conditions.

Conclusion

This Seatylock Secure Gold Bicycle U-Lock is one of the best in the industry. Built as a sturdy, weather-resistant and durable bike lock, it not only performs well but also works great with the street signposts and bike racks. Overall, we feel that this one is the swiss-army knife in the market of U-shaped bike locks.

#4. TiGr Mini+ Titanium Bike Lock & Mounting Clip

When you want to function and style to go hand in hand, check out this TiGr Mini+ Titanium bike lock with mounting clip. Titanium is known to be a low density, corrosion-resistant, and high strength metal, so you can be rest assured of the quality. It has been tested by real-world thieves and proven that it is immune to the standard bike theft tools available. When it comes to the design and built, this high-security lock sports a disc-style lock cylinder that includes two keys. The PVC coating on the bike frame protects it from any scratches or damages during the ride.

The bike comes with a mounting clip that is easy to install and use. We are also impressed with the simple functionality that takes stress and complexity out of bike locking. It includes a push-button that enables you to quickly lock the bike to any frame or signpost. Most importantly, despite of being a theft-proof and sturdy bike lock, it is lightweight and easy to carry without adding up to your weight which cycling. There are two keys, so you may keep the other one for an emergency if you miss one key and get locked out.

Product features and specifications

Weighs 1.4 pounds
Strong, light, easy to carry security
Key function lock (two keys)

Rattle free mounting clip
PVC coating on the bow
Disc-style lock cylinder

Made in the USA

User/ Customer reviews

People who don’t like using chain and U-locks due to their weight are pleasantly surprised with the lightweight of TiGr titanium bike locks. Cyclists are impressed with the high security it offers and the ability to lock two bikes at a time. Racers and mountain bikers who strive to bring down the weight of bikes to improve their speed find this one really useful. A few customers feel that it’s too expensive than what it is worth.

Conclusion

This titanium bike lock has an appearance and built which is enough to deter a lot of bike thieves. While it cannot be cut using standard tools, however, smart thieves equipped with advanced tools can still steal your bike, so this may not be a good choice if you have to leave your bike unattended outside for several hours. Overall, this is a good choice if you don’t leave your bike for more than 15 minutes or so in strange places.

#5. AKM Security Bike Chain Lock Heavy Duty Bicycle Lock

If you live in an area with a moderate risk of bike theft then the AKM Security Bike Chain Lock is a great option. It comes with a 10mm long heavy-duty and a high-strength square link chain that cannot be broken with standard sawing and drilling. With a strong locking mechanism and hardened alloy steel, this lock is engineered for anti-theft. Besides using it as a sturdy and durable lock for your bike, it can also be used for locking your motorcycle, ATV, electric cars, tricycles, doors, ladders, grills, and any other valuables.

Made from non-toxic PVC material and reinforced alloy steel, this bike lock chain is built to conform with the norms of the EU environmental standards. It includes a nylon sleeve cover that gives extra protection and prevents any scratch or damage on your bike frame. The reinforced collar increases protection and security for the disc-style cylinder. It also has a bent foot ergonomic design which significantly reduces the amount of torque applied to stop them from breaking or bending. Hence, it is practically immune to most of the common tools used for bike theft.

Product features and specifications

Weighs 10 pounds

4 feet long chain
10 mm hardened steel
Alloy steel material

Non-toxic PVC material
Innovative ergonomic design

User/ Customer reviews

Some cyclists have mentioned how this bike lock has in real world saved their cycles from being stolen numerous times. People like the fact that even after several attempts, thieves only end up damaging the lock slightly but they could not steal the bike. While most users seem to love the sturdiness and durability of the lock, some people find it too heavy to carry while others wish it was been a bit longer.

Conclusion

If you want a really strong and sturdy lock that you can put around your bike and enjoy a peace of mind then it has to be the AKM Security Bike Chain Lock. It certainly has the ability to prevent potential bike thefts, and it is suitable for people who live in high risk of bike thefts.

#6. Kryptonite New York Standard Heavy Duty Bicycle U Lock

If you are looking for a sleek, slender, compact, yet sturdy U-lock then check out the Kryptonite New York heavy-duty bicycle lock. Made from 16 mm hardened steel, this is one of the sturdiest bike locks that resist theft attempts made using standard hand tools, leverage attacks, and bolt cutters. It sports a toughened double-deadbolts that can engage both the ends to improve the holding power. The interior locking dimensions are 4 x 8 inches and it boasts a pass-thru crossbar design that includes advanced anti-rotation features. Thus, it gives you enhanced protection against any type of twisting or single-cut theft attempts.

As an owner of this heavy-duty Kryptonite lock (learn more), we suggest that you register with an anti-theft protection program to activate the offer. We are impressed to find that the manufacturer stands behind the product and provides full protection. If in any circumstance, this product is defeated despite being used properly, the company will pay you a certain value depending on the security of the product. If you also register your keys online, Kryptonite will send you two additional free keys to safeguard you in case you lose the keys.

Product features and specifications

Measures 3.2 x 1.2 x 1.2 inches
Weighs 4.54 pounds
Key Safe Program

Hardened Double-deadbolts
Keys for free
High-Security Disc-style Cylinder

Flexframe-U Bracket
3 stainless steel keys

User/ Customer reviews

People go as far as calling this cycle bombproof and despite being engineered in a complex way to prevent any bike theft attempts, it is also extremely user-friendly. Some users have said that they have had this lock for several years and the peace of mind it gives is incomparable. A few users have warned that the lock may not work for areas that have a high risk of bike theft as it can be cut by advanced tools like angler grinders.

Conclusion

This bike lock rates 9 out of 10 in the Kryptonite security scale and also comes with anti-theft protection to fall back in case your bike is still lost. Although this does give peace of mind, the lock is not fully immune to an advanced method of cutting lock. However, at this price, we feel that you get good value for money.

A Buying Guide To Help You Choose The Right Bike Lock

After reviewing dozens of products online, we have come to the conclusion that no bike lock is completely immune to the advanced tools used by thieves. So, finding a lock that can’t be cut turns out to be a utopia but you can still deter the theft attempt by choosing your lock wisely. Here are a few things to keep in mind.

High Security and Lightweight

When you have an expensive bike or you have to leave your cycle unattended for several hours, you need to ensure that you invest in a high-security lock that cannot be cut in seconds. Cheap cable locks can be cut effortlessly using bolt cutters. It takes comparatively more time for a thief to cut a hardened-steel U-lock using an angle grinder. So, look for a perfect balance of weight and security.

Consider your location

The kind of security you need will probably depend on the location where you leave your bike locked and for how long. Areas such as college campuses and metropolitan cities where lots of bikes are parked are more susceptible to thefts and require more security.

Ease of use

The next important factor to consider is probably the ease of use because you will not want to keep fidgeting with your lock in order to close or open it. You will need to secure the bike to an immovable object like a bike rack or signpost, and for this, you will need to hold the bike as you lock it. In some cases, you should be able to use the bike lock with just one hand.

Weather-proof

If you live in a region that often gets rains and precipitation, you will need a bike lock that is rust-resistant. While no lock design gives you a completely watertight seal around the opening, you may still look for products made of materials that are more weather resistant. You may consider looking for a layer of weatherproofing around the key barrel.

Weight and style

The weight and style of your lock also matter a lot and have an impact on their usability. Some lock designs may come with a mount that will influence the way you handle the bike. There are also many wearable designs that make it easier for riders to carry the lock. Racers who seek speed may want a lock that is immune to getting cut but also light enough to maintain their agility.

Related Article: Where To Put Your Bike Lock While Riding

Types Of Bike Locks To Consider

To understand which bike lock would suit your needs best, it’s important to have a fleeting idea of the different designs of locks available. Let’s take a look at them and also find more about their pros and cons.

U-Lock and D-Lock

These are one of the most powerful bike locks made from hardened steel that cannot be defeated with standard tools. They require power tools to cut through. Some of them have double deadbolts that require at least two cuts to open. On the downside, these locks are heavier and pricier than the other varieties available.

Cable Locks

While many cyclists tend to prefer these locks because they are lightweight, cheap, and easy to wrap around a frame, they are one of the least secure types. Most of the bikes that get stolen either have a chain or cable lock that can be defeated with 12” bolt cutters. As a result, they should only be used in areas that have low-theft risk.

Chains Locks

These bike locks can be just as secure as their U or D counterparts if the chain is made from hardened steel and the shackle is durable enough. The benefit is that a large chain can easily lock the bike frame with both wheels with a tree or post. However, a hardware store chain can be easily defeated by a set of bolt cutters

Folding locks

These are a popular alternative to the cable and chain locks and the biggest advantage of using a folding lock is that they can be folded of course, making them perfect for the commuters. Similar to the chain, they allow you to secure your bike with bigger and wider objects. Unfortunately, a good quality power drill can cut their connecting joints.

Tools Thieves Use To Cut A Bike Lock

Before you pick a bike lock that is immune to the tools thieves use to cut them through, it’s important to have an idea of the type of tools available. Just like the locks have become more advanced, the thieves have also become smarter and their tools are more advanced. Here are some of the standard and advanced tools used for cutting locks:

Lock picking

This is more of a technique and requires basic tools with some skills to open a lock-in as less as 30 seconds. Sometimes a pair of bobby pins may be enough but they stand defeated on locks that sport with disc-detainer styles.

Bolt cutters

These tools can be found at any home improvement shop and thieves use them to cut through expensive locks within a matter of seconds. They may make a sound but too feeble to hear even if you are 20 feet away. U-Locks made from hardened steel give a tough resistance to bolt cutters.

Hacksaw

The most case-hardened steel locks can succumb to a hacksaw in 30 seconds and if the lock is made from stainless steel (which is rare), an experienced thief can still cut it in 90 seconds. So, there’s not much you can do.

Cordless drills

They make more noise than the bolt cutters but you may hardly hear in a noisy street. Unlike a large set of cutters, thieves find it easier to carry without raising any suspicion. They are quieter than the angler grinders.

Angler grinder

This is considered as the toughest of all because most locks, no matter how sturdy, succumb to the 7,000 rpm of an angler made from aluminum-oxide disc. It takes between 10 to 30 seconds to cut through most of the locks in the market.