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Best Bike Locks in 2021

Bike theft is an unfortunate reality that all cyclists have to face at some point. Unless you only use your bike for short rides and never stop at shops or restaurants, you will inevitably need a bike lock at some point. Naturally, more valuable bikes are at higher risk and some should never be left chained up in public. Many competitive cyclists even use a cheaper secondary bike for general commuting around town and keep their expensive bikes safely at home.

bicycle locked with ulock and chain lock

Remember to always lock to a stationary object that cannot be cut or easily remove the bike from. Always place the lock facing the ground when possible, and avoid dark alleys!

Always lock according to value $$$

1. Frame

2. Rear wheel

3. Front wheel

Which Bike Lock to Choose?

The threat of bike theft differs from place to place, with big cities like London, New York, and Los Angeles being some of the worst-hit areas. Depending on where you live, you will need a certain quality and style of bike lock.

Most security specialists suggest using a bike lock that costs at least one-third of the value of your bike!

The chain lock is the strongest bike lock type but also the heaviest and often least convenient to carry. If you don’t live in a high-risk area, a simple chain and padlock or good-quality D-Lock (a.k.a U-Lock) should be sufficient. Many cyclists also find folding locks more convenient to transport but their moving parts make them weaker than U-locks.

  • Most compactFolding lock
  • Compact & durable – U-Lock
  • Most durableChain / D-Lock
  • Best reach – Chain lock & Folding lock
  • Cheapest, also the least safest lock – Cable

bicycle lock explanation

Whatever type of bike you have, there is a bike lock that fits your needs and budget. Below we look at the various useful options available.


Table of Contents

1. U-Locks

2. Chain Locks

3. Folding Locks

4. Bike Alarms & Combos

Related: Best GPS Trackers


1. Best Bike Chain Locks

Chain locks are considered to be most effective against bike thieves. This type of lock might not be as convenient to carry around, but they do a great job protecting the bicycle against bolt cutters. Chain locks vary from thinner 11m chain links which are easier to cut to thick 16mm links that require tough bolt cutters to break.

The advantage of chain locks is that they can usually be wrapped around large objects and can lock up multiple bikes at once. If you often find you need to tie your bike to thick trees or abnormal objects, a chain lock might be the answer. As chain locks are generally longer in length, you can easily lock the bike and one wheel with it.

However, the strongest chain locks are very heavy and can add considerable weight to your bike. In addition, they are the weakest form of security with the most potential points of failure in their design (a chain is only as strong as its weakest link).


Hiplok – Gold

2in1 Safety – Wearable chain lock with a reflective sleeve


reflective sleeve bike chain lock around the hips

MSRP:$38 – $140 REI

Hiplok Gold is one of the heaviest locks that should keep away most bike thieves whenever they’d see this massive lock. It’s best suited for those who either travel during the dark or occasional trips in the daytime as the Hiplok can be comfortably used around the hips while cycling.

There is also a reflective sidewall on the sleeve which also helps to prevent the frame from scratches, and it also adds a little cushion whenever you’d be carrying this around your waist.

NOTE – Don’t forget to connect both ends of the chain when locking the bike. (Left photo – While riding 2-way lock / Right photo – When locking up 3-way locking)

  • Chain thickness: 10mm
  • Lock thickness: 12mm
  • Made of: Hardened steel
  • Weight: 5lbs, 5oz
  • Chain Length when locked: 33.5″
  • Chain length unlocked: 24″-44″
  • Comes with 3 keys
  • Reflective sidewall for safety
  • Look indestructible




Kryptonite – New York Chain 1210

One of the sturdiest

thick bike chain lock by kryptonite

MSRP $120 Competitive Cyclist

Inspired by the streets of New York, the Kryptonite 1210 is a decent chain lock by one of the most trusted bike lock brands out there. The biggest advantage of this lock is the length of the chain (40″) which can be locked over any thinkable object such as trees or lamp posts. There’s plenty of room to lock either wheel along with the frame, although it is not as comfortable around the waist while transportation, so you’d need to have extra compartments for storage.

  • Chain Thickness: 12mm
  • Made of: Hardened manganese steel
  • Weight: 8lbs 9oz
  • Chain Length: 40”
  • Comes with 3 stainless steel keys
  • Built-in light when need to unlock it in the dark
  • Replaceable battery




Abus – Granit CityChain 1010

Great weight to security ratio

chain lock with sleeve

MSRP from $99 REI

This is a classical chain lock with different size availabilities. The soft sleeve around the metal chain will not scrape against the frame in case you were planning to wrap it around the bike when commuting, or simply lock it regularly on a daily basis. It’s bulky and heavy, which in most cases is just about enough to lock the frame and either wheel! Abus is a well-known name in the game, and the Granit series locks come in various different sizes.

  • Chain thickness: 9mm
  • Lengths:
    33″ – 85cm
    43″ – 110cm
    55″ – 140cm
  • Hex temper-hardened steel links
  • Durable cloth cover protects the bicycle from scratches
  • Security Rating: 12/15
  • Lock Style: Integrated




Kryptonite – KryptoLok 990 Combo Chain Lock

A keyless combination chain lock

combination chain lock


A great alternative to those who wish to commute keyless – the 990 Krpytolok Combo by Kryptonite offers a considerable amount of safety in low to moderate theft-risk neighborhoods. The concept of this lock makes it unappealing for bolt-cutters or any other tool besides the angle grinder, which also needs quite a bit of time and effort to get it open. This is a great choice for those who are better at remembering the passcodes than keeping small keys. After all, it is a $75 bike lock for by a known bike lock brand!

  • 5-digit combination
  • Lock Thickness (mm) – 9.5 millimeters
  • Material – 3T manganese steel
  • Length: 35 inches
  • Weight – 5 lbs. 13.6 oz. pounds




2. Best U-Locks

U-locks, also known as D-locks, are the strongest and safest locks available as they are almost impossible to break, even with industrial tools. Some might even believe that even the toughest chain lock is nowhere near as secure as a U-lock.

However, never buy a cheap U-lock as these are made from weak materials and are easy to pick.

U-locks come in varying sizes and thicknesses and should include an independent rating from a security testing company like Sold Secure or ART. The downside to U-locks is that they only fit around an object smaller than the size of the lock, so you may have to search long to find a suitable place to park. They can also be difficult to carry on the bike and often take up space in the frame where water bottles or other objects could fit.

The best U-locks are made by Kryptonite, ABUS, and Yale. If you live in a high-risk area like a busy city, always use a U-lock in combination with a steel cable to secure your wheels.


RockyMounts – Compton Large

Clean stainless steel finish

rockymounts compton u lock

MSRP $120 PlanetCyclery

A full metal lock that’s easy to use and carry around. It is as sturdy as it looks and does a great job locking the bike in most cases where it can be attached around. RockyMounts offers a wide range of locks with different sizes and shapes, while the Compton Large being one of the largest and heaviest.

  • Weight: 4lbs 10oz
  • Shackle length: 185mm
  • Shackle width: 115mm
  • U-lock diameter: 18mm




Kryptonite – Messenger Mini Plus U-Lock

Frame + wheel

Messenger Mini+

MSRP $90 Planet Cyclery

Designed for NY bike messengers who are locking and unlocking all day to countless different objects. The extra shackle is meant designed to lock the rear wheel with the frame! NOTE! Don’t forget to not use the extender shackle as the main point of locking, as it’s not as strong as the main U-lock shackle!
  • The wheel extender can secure either the front or back wheel while the mini captures the frame and the immovable object
  • Reduced shackle diameter to 11mm for decrease weight
  • Bentfoot double deadbolt design
  • High-security DuoCore cylinder
  • Two stainless steel keys with coiled wrist key chains
  • Security Rating: 7 out of 10
  • Diameter: 11 mm
  • Lock Style: Keyed
  • Weight: 2.5 lbs
  • 3.75 x 6.5″
  • Includes 3.25″ wheel extender shackle




Kryptonite – New York STD U-Lock with Bracket: 4 x 8

One of the thickest U-locks

thick u lock

MSRP $115 Planet Cyclery

Another NY-inspired U-lock that lets you leave the bike on the street without constantly thinking if it is still there or not. It is among the safest options you could choose as the 4 by 8 is one of the toughest U-locks with a 16mm thick shackle!

  • Hardened deadbolt locking for extensive holding power
  • Includes 3 Stainless Steel keys (2x standard and one with a LED bulb for convenient, easy unlocking in the dark)
  • Higher security disc-style cylinder
  • Patented hardened steel sleeve over crossbar for double security
  • Highest security Kryptonite lock, 16mm Kryptonium steel with double deadbolt design
  • Oversized hardened steel sleeve over crossbar for double security
  • Lock Size: 4″ x 8″+




Abus – Ultra 410

Longest shackle for a wheel and a frame, or for two bikes

ultra long u lock

MSRP $50 Planet Cyclery

An extra-long U-lock that’s convenient to use when you’d like to lock both the frame and one of the wheels.

  • Length: 11″
  • Diameter: 12 mm double-bolting temper-hardened steel shackle
  • Shackle Width: 4.25″
  • Lock Style: Keyed
  • Weight: 3.7 lbs
  • Pass through, double-bolting steel shackle provides anti-twist protection
  • Patented double-layer key design reduces breakage
  • Security Rating: 8 of 15
  • 2x keys included with durable SH34 fixing bracket (fits 24-35mm)



Kryptonite – KryptoLock Standard U-lock with cable

Frame & wheel combination

u lock with cable


Kryptonite has taken that extra step towards protecting the bike and accessories against bike thieves. Although the cable lock is not among the most recommended types out there, it still does a great job on basic wheel protection when used in combination with the D-lock.

  • Weight: 2lbs 13oz
  • Dimensions: 9″ x 4″
  • Lock thickness: 12.7mm




3. Best Folding Bike Locks

Folding locks offer the flexibility of chains with some of the added strength of U-locks, making them more versatile but slightly less secure. They usually tuck away discreetly into a frame holder or bag so they are easy to carry.

However, even the best folding locks require rivets to fold which are susceptible to attacks by drills or similar tools. While many folding locks have decent security ratings, a U-lock with an equivalent rating will always be stronger.

The best folding locks are made by ABUS, SeatyLock, and Foldylock. Silver-Rated folding locks should be secure enough for high-risk cities but use them only if you absolutely can’t carry a U-lock.


Kryptonite – KryptoLok 610 Folding Lock

Super durable, lightweight and compact

kryptonite folding lock

MSRP $100 Planet Cyclery

The Kryptolock Folding locks feature 6x 5mm hardened steel links hinged together to create a flexible, secure lock that compacts down to a small package for portability.

  • 100cm
  • Security level: 6/10
  • Includes 2 keys




ABUS – Bordo uGrip Lite Mini 6055 Keyed Folding Lock: 85cm Black

abus bordo folding lock with keys


The Bordo 6055 Mini Lite is the lightest folding lock ABUS has produced. Weighing in at less then a pound the 6055 easily fits in a jersey pocket or hydration pack. This lock is perfect when used in city streets where there’s enough lighting and traffic, used on a bike that’s not overly flashy or expensive. It is not among the safest locks out there, but it goes a long way in terms of convenience and basic locking!

  • Composite links constructed of 5mm steel wire and plastic
  • Drill resistant rivets
  • Snap Closure
  • Lock Style: Keyed
  • Length: 85 cm
  • Advertised Weight: 1.1




Abus – 6150 Bordo Lite Combination

abus bordo combination lock

MSRP $100 Planet Cyclery

A great solution for those who’d like to keyless and lock up their bikes on safer neighborhoods. It’s super compact and won’t scratch the bikes’ frame and comes in a rattle-free

  • Length: 33″ / 85cm
  • Soft-touch coating
  • Silicone lock body
  • Rattle-free carry pouch
  • 5mm thick steel wires




4. Best Bike Alarms

Bike alarm systems are becoming more popular these days as technology gets smaller and cheaper. Some bike alarms come as part of a lock, whereas others are just an alarm and must be used in combination with a separate lock. Using just an alarm on its own is not adequate security as a thief could still escape with your bike physically before you have time to react.

Most alarm-enabled bike locks are weaker than traditional locks because the alarm should deter any extended attempt at theft. This means they offer a good lightweight alternative to heavy U-locks while still offering a high level of security.

Also, many bike alarms come with wireless or Bluetooth connectivity and will send an alert to your phone when they are tampered with. However, bike alarms should always be considered an additional level of security and are best when used in conjunction with a strong traditional lock

Popular bike alarm locks include the ABUS Bordo Alarm Plus, the Nunet Nulock, WSDCAM Wireless Alarm, and G Keni A6 taillight alarm


Abus – 440A Alarm U-Lock – 4.2 x 6.3″, Keyed, Black/Red, Includes bracket

Bike lock with an alarm

abus u lock alarm lock

MSRP $90 Planet Cyclery

Abus 440A Alarm U-Lock is equipped with the proven 3D Position Detection System, which registers even the smallest movement. Whenever locking a bicycle with this Alarm U-lock, make sure the lock is snug around the bike and thief so it wouldn’t start alarming right away when you are about to unlock it!

  • Hardened 12mm thick round shackle
  • Alarm at a volume of at least 100 dB for 15 seconds, followed by automatic reactivation
  • CR2 batteries included
  • Shackle, the body and the load-bearing parts of the locking mechanism are manufactured using a specially hardened steel
  • Length: 6.3″
  • Diameter: 23 mm
  • Lock Style: Keyed




Abus – Bordo Big Alarm 6000A Folding Lock

100dB intelligent alarm

MSRP $200 Planet Cyclery

The Bordo Big Alarm 6000A Folding Lock is one of the most expensive bike locks in this list. It is a lock with alarm of a 100dB intelligent system making it an ideal solution for many who wouldn’t settle for only one type of lock. Although it is rated as 10/15 in terms of safety, it is a lock that’s well-suited for somewhat safe neighborhoods. Why? It’s because folding locks are not among the strongest locks to break in, and having a bike alarm won’t stop the thieves from physically removing the bike.

  • 100dB intelligent alarm system
  • Different lengths – 47″ (120cm) / 35″ (90cm)
  • 5mm steel bars with a soft coating to protect bikes’ paint
  • Includes front loading SH bracket for use on all styles and sizes of bikes
  • Security Rating 10 of 15




G-Keni – Bike Light Alarm

Best bike alarm system – light & protection


bicycle rear light alarm for bikes

MSRP Check Price at Amazon.com

  • 3-distinct flashing modes: burst/slow/steady on
  • Water-resistant
  • 120 dB Theft-deterrent alarm with remote activation and deactivation
  • The remote control operates on distances up to 16 feet
  • Wireless electric horn to alert others or cars while riding thru traffic.
  • Both saddle and seat post mounting kits are included.
  • USB rechargeable with built-in 700mAh lithium battery that lasts up to 15 days / or up to 15 hours of flashing
  • Charge time 2-3 hours
  • One-year quality guarantee.

NOTE: Whenever you purchase a bike lock – make sure to register your keys in case you lose them and need a replacement

Best Bike Lock Brands:

  • Kryptonite
  • OnGuard
  • Ottolock
  • Hiplok
  • Abus

Where to Shop For Best Bike Locks Online?

Key vs Combination lock

Whether to get keyed or a combination bike lock comes down to personal preferences. Although most higher-end locks are equipped with keys, a keyless bike lock is a great alternative as well. However, when you’d like to commute keyless or have a tendency to lose small keys – a combination lock might be for you. But, don’t forget that combination locks have a 4-5 digit to remember as well!


How to Choose

How to choose the severity of bike theft

Image Source: Kryptonite



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One thought on “Best Bike Locks in 2021

  1. Patrick Wise says:

    I think Kryptonite Keeper is a great chain bike locks. I’ve been able to use it to lock my bike in all kinds of weather, including blazing heat, rain, and wind. I was astounded by how consistently high-quality and dependable it is. The physical characteristics have not changed, and it still appears to be brand new.

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