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The Strongest Bike Lock – Seriously Strong Locks Reviewed

So, you’re wondering which is the strongest bike lock, and you’ve come to the right place!

With a bike being stolen every 90 seconds in the UK, the need for the strongest bike lock possible has never been greater.

As you may already know no bike lock is undefeatable. However, there are a select few that can be considered the strongest bike locks.

The bike locks listed below are the strongest bike locks on the market to date and are guaranteed to make thieves think twice before trying anything funny.

I’ve also recently reviewed the best uncuttable bike locks, you can read about the 5 unbreakable locks here.

The strongest bike lock, a map displaying bicycle theft hotspots in the United Kingdom
Wherever you live, make sure to secure your bike properly. Watch out Londoners!

With so many different types of bike lock available, it can be confusing which is best suited to you and your bike.

Each manufacturer uses a different set of materials, but normally you can rely on the key rule of thumb:

The thicker the lock’s shackle or links, the stronger the bike lock.

Table of Contents
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    The Strongest Portable Bike Locks

    Kryptonite Fahgettaboudit Mini – The Strongest Portable Bike Lock

    The Kryptonite Fahgettaboudit sends a clear message to bike thieves: Forget about it!

    This chunky D lock is easily the strongest portable bike lock available and makes most other D locks look flimsy.

    This lock features an 18mm hardened max-performance steel shackle, which makes it completely bolt cutter proof. It’s one of the 8 best bike locks on the market and for good reason!

    For a bike lock to be bolt cutter proof, it’s shackle or links need to be at least 16mm thick. There are a few exceptions for some locks, but I stick to this as the general rule of thumb.

    This doesn’t mean, that locks with thinner shackles or links are no good. Just not quite bolt cutter proof.

    Many Sold Secure Gold bike locks have reasonably thin shackles.

    The ABUS 54 Mini (featured below) uses a square 13mm hardened steel shackle and benefits from increased portability, whilst offering similar security ratings to the Fahgettaboudit.

    The 18mm super-thick shackle also means that the Fahgettaboudit is extremely resistant to twist and hydraulic attacks.

    Twist attacks are a technique commonly used by thieves to snap cheaper bike locks. Where a strong object is inserted into the shackle and used to pry it open.

    Unlike other Kryptonite locks, the Fahgettaboudit Mini isn’t supplied with a mounting system, but works perfectly with the Huldit Bike Lock Mount. I’d recommend this universal mount if you’re thinking of buying the Fahgettaboudit Mini.

    Best bike lock mount for kryptonite fahgettaboudit
    I use the Huldit Mount to transport my Fahgettaboudit Mini when I'm cycling.

    The Fahgettaboudit also features a high-security double deadbolt system. This feature dramatically increases this locks security and overall strength.

    Whilst it’s labelled as “Mini” the Fahgettaboudit provides plenty of space for locking your bike.

    Measuring 3.25″ x 6″ (8.3cm x 15.3 cm) it’s slightly smaller than your standard D lock, but is still capable of locking your bike properly

    I use the Fahgettaboudit as my main bike lock and combine it with an extension cable. This allows me to quickly secure my bike’s frame and both wheels.

    If you learn how to lock your bike properly, the Fahgettaboudit will be the best choice of the strongest bike locks. 

    How to lock your bike with the kryptonite fahgettaboudit mini
    As I said, using an extension cable alongside the Fahgettaboudit is a good idea.

    The Fahgettaboudit weighs in at (2.06kg), making it heavier than most D locks, but over 1.4lb (0.64kg) lighter than the ABUS Extreme 59 (featured below). 

    When using the Huldit Mount, you won’t even notice the Fahgettaboudit!

    It’s really no surprise that this 18mm D lock is Sold Secure Diamond Bicycle and Gold Motorcycle rated. These security ratings mean the Fahgettaboudit is suitable for use in the highest-risk areas (city centres, side roads, towns etc).

    If you want the strongest portable bike lock, the Kryptonite Fahgettaboudit Mini is the one you need.

    You can view the most competitive price for the Fahgettaboudit here [Amazon link] 

    If you need a lock suitable for multiple bikes, which is still portable, check out the Extreme 59 below. 

    Kryptonite New York FAHGETTABOUDIT Lock - Yellow, Mini
    Kryptonite Fahgettaboudit Mini
    Shackle Thickness
    Shackle Diameter: 18mm
    Shackle Width:
    Shackle Width: 3.25" (8.3cm)
    Shackle Height
    Shackle Length: 6" (15.3 cm)
    Weight: 4.55lb (2.06kg)
    Security Ratings
    Kryptonite New York FAHGETTABOUDIT Lock - Yellow, Mini
    Kryptonite Fahgettaboudit Mini
    Shackle Thickness
    Shackle Diameter: 18mm
    Shackle Width:
    Shackle Width: 3.25" (8.3cm)
    Shackle Height
    Shackle Length: 6" (15.3 cm)
    Weight: 4.55lb (2.06kg)
    Security Ratings

    Last update on 2022-10-03 at 05:33 / Affiliate links / Images from Amazon Product Advertising API

    ABUS Granit Extreme 59 - The Strongest Bike Lock (for locking multiple bikes)

    The ABUS Granit Extreme 59 provides the same Sold Secure Diamond rating for your bike as the Fahgettaboudit.

    The only real difference is that the Extreme 59 uses a larger shackle, which is suitable for securing multiple bikes.

    Before we go any further, this D lock is the most expensive bike lock featured in my review of the strongest bike locks.

    If you find yourself worrying about your bike whilst it’s locked, the Extreme 59 is ideal for you.

    Due to it’s increased shackle size, this D lock does weigh more than the Fahgettaboudit. Weighing 5.95lb (2.7kg) it’s the heaviest lock featured in this list, but at the same time, it offers the most locking options.

    The strongest bike lock - sheldon brown locking method abus 59 extreme
    Using the Sheldon Brown locking method I was able to secure two bikes and their rear wheels at the same time. A great lock for high-risk areas!

    The 16mm hardened steel shackle the Extreme 59 uses is capable of defeating even the largest bolt cutters.

    If you’ve got the budget to cover the cost of this lock, you should consider the Skunklock and decide which will work best for you.

    The Skunklock is one of the only locks capable of defeating angle grinders. It’s worth a look.

    Just like the Fahgettaboudit, Sold Secure awarded the Extreme 59 the highest Bicycle rating (Diamond) alongside the Sold Secure Gold Motorcycle rating.

    The outer mechanism housing of the Extreme 59 is heavily armoured, which protects it from blunt impact attacks.

    Whilst the Extreme 59’s shackle is only 16mm thick, it has a square shape meaning it uses a very similar amount of metal to the 18mm Fahgettaboudit and is just as strong!

    The strongest bike lock - Extreme 59 vs fahgettaboudit shackle size
    As it's lighter and more compact, the Fahgettaboudit is the strongest portable bike lock. The Extreme 59 takes a close second place, but offers more locking options!

    As we’ve already established, the Extreme 59 is heavy. However, similarly to the Fahgettaboudit, it also works well alongside the Huldit Bike Lock Mount. I’d recommend the large size. 

    If the cost doesn’t matter to you, the ABUS Granit Extreme 59 is a great choice. Bear in mind, this D lock isn’t supplied with a mount, but used alongside the Huldit, you won’t have any issues!

    I found the most up to date and competitive price for the ABUS Granit Extreme 59 on Amazon here.

    Abus X-Plus 54 Mini – The Fahgettaboudit's Lighter Substitute

    At almost half the weight of the Fahgettaboudit, the Abus X-Plus 54 mini is the third lock in the list of the strongest bike locks available.

    This mini D lock boasts some seriously impressive accolades: the Gold Sold Secure rating, the Sold Secure Motorcycle Gold rating, and ABUS also rated it 15/15 on their security scale!

    The 54 Mini uses a 13mm square hardened steel parabolic shackle. You may be now thinking, why would I want a 13mm shackle if it is not bolt cutter proof? You’d be right to think so too!

    The square shape of the X-Plus 54 Mini is designed to resist bolt cutter attacks. ABUS also made sure to include the upmarket double deadbolt system within this lock.

    This means two or more cuts are needed before the lock can be removed from your bike. A premium feature that only the best and strongest bike locks utilise.

    The strongest bike lock - ABUS 54 Mini vs Fahgettaboudit Mini
    The ABUS 54 mini offers a similar amount of locking space to the Fahgettaboudit, and weighs significantly less.

    If you want one of the strongest bike locks, but need a lock that’s lightweight and versatile, the ABUS 54 Mini is the lock you require.

    Weighing only 2.56lb (1.16kg) this is the lightest lock included in this review.

    The ABUS 54 Mini made an appearance in my review of the 8 best bike locks, so it’s no surprise it’s also included here!

    The Best Lightweight Bike Lock - ABUS 54 Mini
    The seriously strong ABUS 54 Mini was featured in the best lightweight bike locks as well as being one of the strongest bike locks.

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    The size of this D lock means that it can easily be stowed away in a backpack, which makes it suitable for commuters.

    Unfortunately, (like the other strongest bike locks) the 54 Mini isn’t supplied with a mounting system.

    But don’t let that put you off, just like the others, the 54 Mini works flawlessly alongside the Huldit bike lock mount. I’d recommend the medium size.

    Sold Secure Bicycle & Motorcycle Gold
    For such a lightweight bike lock, these security ratings are seriously impressive. If the Fahgettaboudit is a little too heavy for you, the 54 Mini is the lock you need.

    The Granit 54 Mini is actually one of the cheapest locks in this list. It’s cheaper than the Fahgettaboudit and the Extreme 59, whilst providing similarly high levels of security. 

    For the above reasons the 54 Mini easily earned its place amongst the strongest bike locks. 

    You can find the best price for it on Amazon here

    ABUS Granit X-Plus 54 Mini D-Lock - Black
    ABUS Granit X-Plus 54 Mini
    Shackle Diameter: 13mm
    Weight: 2.64lb (1.2kg)
    Shackle Dimensions: 4.25" x 5.51" (10.8cm x 14cm)
    ABUS Granit X-Plus 54 Mini D-Lock - Black
    ABUS Granit X-Plus 54 Mini
    Shackle Diameter: 13mm
    Weight: 2.64lb (1.2kg)
    Shackle Dimensions: 4.25" x 5.51" (10.8cm x 14cm)

    Last update on 2022-10-03 at 04:30 / Affiliate links / Images from Amazon Product Advertising API

    The Strongest Stationary Bike Locks

    Stationary bike locks are monsters. These bike locks are built to be undefeatable and provide the best possible security for your bike.

    You’d seriously struggle to carry one of these around, as most are over 5kg!

    However, if you always secure your bike in the same location it can be a great idea to leave one of these secured to an immovable object.

    By doing so, you’ll always have the best level of security possible.

    It’s important to note that over 50% of bikes stolen are taken from their owner’s home.

    So make sure that when you secure your bike at home, you are using the best method of protection possible.

    Bike Thief Stealing Bicycle
    According to reports from the Transport Research Laboratory 50% of bikes are stolen from the owners home!

    Stationary chain locks are almost immune to even the biggest hand-powered bolt cutters and aren’t nearly as vulnerable to other attacks as D locks or other portable bike locks are.

    As these chain locks have a large flexible locking area, they’re incredibly hard to defeat with twist & hydraulic attacks. 

    It’s important to remember that, your bike lock is only as secure as the object it’s locked to. If you decide on securing your bike with a stationary bike lock, consider using a top-quality ground anchor.

    All in all, the strongest bike chain locks are a great option for securing bikes and work well in bike sheds and garages. 

    Pragmasis Protector 16mm Chain - Strongest Stationary Bike Lock

    The Pragmasis Protector 16mm is the strongest stationary bicycle chain lock on the market. This chain is made from hardened Boron steel and weighs a whopping 3.02lb per foot (4.5kg per metre).

    This Pragmasis chain received the Sold Secure Gold rating in almost every possible category. From ATV to Caravans and Commercial Vehicles, this chain is capable of securing almost anything. If you need something secured, this will do the job.

    Before we all get too carried away, the Protector is a lot more expensive than the other strongest bike locks.

    It’s also made to order, so won’t be readily available like the other strongest bicycle locks are.

    Wayne Winton a locksmith and Youtuber put this lock to the test and attempted to cut it with two giant (42″) pairs of bolt cutters.

    This is easily one of the best bike chain locks.

    Supplied with this chain is the Squire Squire SS65CS padlock. This padlock is Sold Secure Motorcycle Gold Rated and provides an easy way to secure this hefty chain.

    The squire padlock weighs 2.2lb (1kg) making it one of the best heavy-duty, armoured padlocks available. It’s obviously also one of the strongest bike padlocks.

    When customising your chain at the pragmasis checkout you can make various adjustments (length, end link style and key types).

    Just like the Kryptonite noose chains, you’re able to add a large circular link/noose onto the end of the Protector Chain.

    This feature allows you to pass the chain back through itself and increase the chain’s usable length.

    The strongest bike lock - Noose vs regular
    The Noose End Link allows the protector chain to be threaded back through itself, increasing its usable length. A worthy upgrade if you're planning on buying a Pragmasis chain!

    You can also choose exactly what length of chain you require, starting at 2.62′ (0.8m) and working up to 19.69′ (6m). The strongest, best bicycle chain on the market (stationary).

    Larger Pragmasis chains and Almax chains are available, but with heavier chains than this, you run the risk of damaging your bike.

    A 16mm chain will be enough to protect even the most expensive bikes. Steve from pragmasis agreed that any chain over 16mm thick would be a bit of an overkill for a bicycle!

    If you’re interested in the strongest chain lock, I’ve covered Pragmasis Protector chains in much more detail here.

    Or if you’d like to view the most up to date price on Amazon, click here.

    The New York Legend 1515  – The Strongest Readily Available Stationary Bike Lock

    Whilst this chain isn’t the same size as the Pragmasis Protector, it’s readily available and easier to order online.

    The Pragmasis chains are made to order and can take while to arrive.

    After reading about 16mm bike chains, this 14.5mm chain may sound like a downgrade.

    However, I’ve never heard of this chain being defeated by a pair of hand-powered bolt cutters.

    The New York Legend’s chain is made from 3T hardened steel, which resists even the largest bolt cutters. 

    The Best Bike Chain Lock - New York Legend 1515 14.5mm links
    Each end of this 14.5mm chain is secured by the 16mm New York disc lock.

    The New York Disc Lock supplied with this bike chain has a 16mm shackle, made from max performance steel. It also makes use of the double deadbolt design that Kryptonite use on their top of the range D locks.

    This means that for the armoured padlock to be released, two cuts would have to be made through its shackle.

    Fortunately, at 16mm it’s immune to bolt cutters, and doesn’t provide any weak points for thieves to target.

    The New York Legend 1515 is suitable for all bicycles, it’s one of the best chains for use in garages & bike sheds and easily earned its place amongst the strongest bike locks.

    The 1515 comes with a protective nylon cover, to prevent your bike from being scratched and is also supplied with three stainless steel “I” keys for better ergonomics.

    The Best Bike Chain Lock - New York Legend 1515 locked at destination
    Whilst the 1515 isn't portable, you can leave it locked at your destination. This way you'll have constant access to the strongest bike chain lock.

    This is definitely Kryptonite’s strongest chain lock available, they gave it 10/10 on their security rating scale.

    The chain of this lock is 4.92′ (150cm) long, so it provides plenty of locking space, and can easily be used to secure more than one bicycle.

    The 1515 model weighs 14.7 lbs (6.6 kgs) which is heavy, but you won’t be carrying this whilst you cycle so its weight isn’t an issue.

    Until recently it was quite hard to get hold of this chain, but you can find it in stock on Amazon at a very competitive price, here.

    Kryptonite New York Noose 1275 - Strongest Portable Chain Lock

    As always with my reviews, I like giving my readers the full range of options, and this is where the Kryptonite New York Noose 1275 comes into play.

    The New York Noose is a 12mm six-sided chain made with 3T hardened manganese steel and is designed to put up a fight. It weighs 3.15kg, so it’s on the heavy side, but can still be used on the move.

    This makes the 1275 Noose the strongest portable bike chain.

    This chain is secured by a similar Disc lock to the 1515 Legend, although it’s slightly less secure.

    The Kryptonite Evolution Disc lock uses a Max-Performance steel shackle is 14mm thick, and it features the double deadbolt design that you’d expect from a larger Kryptonite D lock.

    New York 1275

    Whilst it may not be the strongest bike lock featured in this list, it is very strong and does not suffer from the same vulnerabilities that many D locks do.

    These 12mm links aren’t completely bolt cutter proof, but it would be anything but easy to cut this chain!

    As previously stated, if you can keep your lock off the ground it greatly reduces the locks vulnerability, and will make it much harder for a thief to steal your ride!

    Sold Secure gave the 1275 the Gold rating and ART gave this chain lock 4/5 which means they deem this lock suitable for securing not only bicycles, but mopeds and motorcycles (on the road) too!

    If D locks aren’t for you and you’re able to bear the slight weight increase this is your next best bet!

    Kryptonite New York Noose 1275 (12Mm X 75Cm) With Evs4 Disc 14Mm Shackle
    Kryptonite New York Noose 1275
    Link Thickness: 12mm
    Weight: 6.95lb (3.15kg)
    Chain Length: 29.5" (75cm)
    Kryptonite New York Noose 1275 (12Mm X 75Cm) With Evs4 Disc 14Mm Shackle
    Kryptonite New York Noose 1275
    Link Thickness: 12mm
    Weight: 6.95lb (3.15kg)
    Chain Length: 29.5" (75cm)

    Last update on 2022-10-03 at 01:13 / Affiliate links / Images from Amazon Product Advertising API

    Portable and Non-Portable Bike Locks - What's the difference?

    As you may have noticed, I separated the strongest bike locks above into two categories: Portable bike locks & Stationary bike locks.

    If you’re looking for something super heavy duty for securing your bike in one fixed location, then consider a stationary bike lock.

    These locks are too heavy to carry whilst cycling but provide unrivalled protection. Consider leaving one of these in places that you often leave your bike, this way you’ll always have access to it without having to carry it!

    However, if you need a super-strong bike lock, that you can slip inside a rucksack and easily transport, then you’ll be best off with a portable bike lock.

    Cartoon Man Carrying TV
    Don't get caught out, if you need a bike lock you can use on-the-go, make sure its light enough to carry!

    Portable bike locks are bike locks that you can keep on you as you travel on your bike throughout the day.

    D lock’s are an example of a portable bike lock. You’ll be able to comfortably fit these into your rucksack, or transport them using the Huldit Bike Lock Mount.

    Perfect for commuters, couriers, and casual cyclists portable bike locks are the most popular type of bike locks.

    The Kryptonite Fahgettaboudit Mini is the strongest portable bike lock and is covered towards the top of this page.

    Summary - The Strongest Bike Locks

    So there we have it, the strongest bike locks available to date. I will keep on updating this list as new releases are made, but you can rest assured these locks won’t let you down if you use them to secure your bike properly.

    It’s important to remember that no bike lock is undefeatable. However, there are many steps that you can take to make sure yours is as secure as it can be.

    You should also remember that security comes at a price. If you want to secure your bike with the strongest and best bike lock, it will cost you.

    If you’d like to view some more budget-friendly locks, check out the best cheap bike locks. Or for a wide range of recommendations read about the 8 best bike locks on the market.

    Chain and Lock off ground Pragmasis Protector Review
    Nice bikes need a decent lock! I like using my pragmasis protector to secure my bikes at home.

    If you ride a nice bike, get yourself a nice lock. It doesn’t make sense to purchase an expensive bike, only to secure it with a £20 lock.

    Police guidelines are to spend 10-15% of the value of the item on its security.

    So you now know which are the strongest bike locks, take a look at my guide covers the steps you should take before your bike is stolen for tips that will greatly increase your cycle security skills.

    Thanks for reading, and remember, lock it, or lose it!

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    Hello! My name’s James, I’m an avid cyclist and the lead editor of BikeLockWiki.

    I’ve invested over four years into researching & studying bicycle security. Now I want to share the information I’ve learnt, for free, with the online cycling community.

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