Bike Chain Locks might not always be the flashiest option in the world of bicycle security, but they offer a unique blend of flexibility and robust protection that’s hard to beat. For cyclists seeking to safeguard their rides, understanding the strengths and types of bike chain locks is crucial. This guide dives deep into the world of bike chain locks, helping you navigate the options and choose the perfect security solution.
Firstly, what makes bike chain locks stand out? Their length and flexibility are key advantages. Unlike rigid u-locks, chain locks can wrap around a wider variety of objects, allowing you to secure your bike in more diverse locations. This adaptability is a major plus for urban cyclists and anyone who needs to lock their bike in less-than-ideal spots.
Another benefit for some is portability. Shorter, thinner chain locks can be easily coiled and carried around a seat post, eliminating the need for frame mounts that some cyclists find cumbersome.
Chain lock around seat post
Moreover, chain locks exhibit impressive resistance to certain common theft techniques targeting other types of bike locks. They are inherently resistant to bottle jack and leverage attacks. Additionally, their construction makes them more challenging to cut through with power tools like angle grinders compared to some other lock types.
However, these advantages are counterbalanced by a significant drawback: weight. Bike chain locks are considerably heavier than u-locks offering comparable security levels. This weight factor necessitates categorizing chain locks into two main groups based on their intended use:
- Portable Bike Chain Locks: Lighter chains designed for everyday use on the street, easily carried on your bike.
- Stationary Bike Chain Locks: Heavier, more robust chains intended for permanent use at home, work, or in secure storage spaces like sheds or garages.
Before investing in a bike chain lock, it’s essential to determine your primary need: do you require portable security for locking on the go, or stationary security for safeguarding your bike at a fixed location?
To guide you, we’ll explore six top-rated bike chain locks based on rigorous testing, covering both portable and stationary security options. Following these reviews, a comprehensive guide will walk you through the key factors to consider when choosing a chain lock, including a short quiz to help you determine your required security level.
The 6 Best Bike Chain Locks
1. Seatylock Viking Silver: Best Mid-Security Portable Chain
The SeatyLock Viking Silver stands out as the only 7mm link chain lock boasting a Sold Secure Silver rating. This certification highlights its exceptional strength-to-weight ratio, allowing for a longer chain without excessive heft.
Seatylock Viking Silver 90| Seatylock Viking Silver 90 |
|---|
| Check price: > Check price at Amazon |
| Chain thickness: 7 mm |
| Weight: 2.98 lbs (1.35 kg) |
| Length: 35.4″ (90 cm) |
| Security Rating: Sold Secure Silver |
Viking Silver 90 Pros
- Unique magnetic fastening for ease of use.
- Easy to carry and handle.
- Good medium-level security.
- Offers versatile locking options due to its length.
Viking Silver 90 Cons
- Rubber sheath durability could be improved.
- Cheaper Silver-rated locks are available.
The tested 35.4″ (90 cm) version weighs just 2.98 lbs (1.35 kg), equivalent to about 3.5 cans of soda. While not featherlight, its length significantly expands locking possibilities compared to u-locks, even allowing for securing two bikes simultaneously. This makes its weight remarkably justifiable.
Seatylock Viking Silver 90 around lamppost
However, it’s important to recognize that the Viking Silver is a mid-security lock, not ideal for high-risk areas. Its 7mm links are vulnerable to bolt cutters, especially if a thief can position the lock for ground leverage.
To mitigate this risk, keep the chain elevated from the ground. For 7mm chains like this, tightly wrap it around the top tube or seat stays and rear wheel to maintain distance from the ground.
Seatylock Viking Silver 90 high up on stand
A standout feature of the SeatyLock Viking is its magnetized shackle. This ingenious design simplifies joining the chain ends, particularly useful in crowded bike racks where fumbling can be frustrating.
The Viking Silver is also available in 43.3″ (110 cm) and 55.1″ (140 cm) lengths for those needing extra reach. A shorter 21.5″ (55 cm) version would be ideal for city riders prioritizing chain flexibility without needing excessive length.
Seatylock Viking Silver 90 vs Kryptonite Kryptolok
Potential drawbacks include its mid-level security and build quality. Compared to Kryptonite’s robust plastic finishes, the Viking’s thin rubber sheath at the chain ends feels less durable and can be easily displaced, exposing the chain links.
Despite these minor points, the SeatyLock Viking Silver range offers the lightest Sold Secure Silver rated chain locks on the market. If you prioritize a long, versatile chain without excessive weight, the Viking Silver is an excellent choice.
For a deeper dive, refer to the comprehensive, hands-on SeatyLock Viking Silver 90 review.
2. Kryptonite Kryptolok Series 2: Security & Practicality in Perfect Balance!
The Kryptonite Kryptolok Series 2 chain locks represent a significant security upgrade from the SeatyLock Viking. Featuring 9mm chain links and a Sold Secure Gold rating, this series offers a robust defense. While various lengths are available, the 955 Mini, the shortest in the range, was tested.
Kryptonite KryptoLok Series 2 955 Mini
| Kryptonite Kryptolok Series 2 955 Mini |
|---|
| Check price: > Check price at Amazon |
| Chain thickness: 9 mm |
| Weight: 3.90 lb (1.77 kg) |
| Length: 21.5″ (55 cm) |
| Security Rating: Sold Secure Gold |
Kryptolok Series 2 955 Mini Pros
- Excellent build quality, ensuring longevity.
- Sold Secure Pedal Gold rating for high security.
- Compact and lightweight for its security level.
Kryptolok Series 2 955 Mini Cons
- Short length might be restrictive for some locking scenarios.
- Not the most secure Gold-rated lock available.
The Kryptonite KryptoLok Series 2 955 Mini measures just 21.5″ (55 cm) long, providing a similar locking space to a standard u-lock. This compact length keeps weight and bulk to a minimum, enhancing portability.
Kryptonite Kryptolok Chain Mini 955 around seat stays
Despite its significantly improved security over the SeatyLock Viking 90, the Kryptonite KryptoLok Series 2 955 Mini is only marginally heavier at 1.77 kg (3.90 lb), roughly equivalent to 4.5 cans of soda.
Kryptonite Kryptolok Chain Mini 955 around lamppost
For those prioritizing the extended locking options of chain locks, the Kryptonite KryptoLok Series 2 is also available in 37.5″ (95 cm), 47.3″ (120 cm), and 60.0″ (150 cm) lengths. However, be mindful that weight increases substantially with length; the 60.0″ (150 cm) version weighs a hefty 3.67 kg (8.10 lb), about the same as 10 cans of soda!
Kryptonite Kryptolok Chain Mini 955 around seat post
For keyless convenience, combination lock versions are also available in two lengths. These are unique as the only combination chain locks with Sold Secure ratings (excluding lower-rated Bronze locks).
While still not designed for extremely high-risk environments, the Kryptonite Kryptolok Series 2, when kept off the ground, offers formidable protection and boasts excellent build quality for long-term reliability.
For a comprehensive review, see the hands-on Kryptonite KryptoLok Series 2 955 Mini review.
3. Best High Security Portable Chain: Kryptonite Evolution or Hiplok Gold?
Choosing between the Kryptonite Evolution Series 4 1055 Mini and the Hiplok Gold for the best high-security portable chain lock is a tough call, as the ideal choice depends on your priorities. Both offer 10mm chain links and Sold Secure Gold ratings, but cater to different needs.
The Kryptonite Evolution Series 4 1055 Mini prioritizes security and compactness. It’s lighter and arguably more secure, but considerably shorter.
Kryptonite Evolution Series 4 1055 Mini
| Kryptonite Evolution Series 4 1055 Mini |
|---|
| Check price: > Check price at Amazon |
| Chain thickness: 10 mm |
| Weight: 4.40 lbs (2.00 kg) |
| Length: 21.5″ (55 cm) |
| Security Rating: Sold Secure Gold |
Evolution Series 4 1055 Mini Pros
- Exceptional build quality for lasting performance.
- Top-tier portable security in a chain lock.
- Compact and relatively lightweight for its strength.
Evolution Series 4 1055 Mini Cons
- Short length may limit locking options for some users.
- Less convenient to carry compared to some alternatives.
The Hiplok Gold, on the other hand, emphasizes portability and locking versatility. It’s designed for easier carrying and provides more locking options due to its longer length, but it is heavier and slightly less secure than the Evolution Series 4.
Hiplok Gold chain lock| Hiplok Gold Chain |
|---|
| Check price: > Check price at Amazon |
| Chain thickness: 10 mm |
| Weight: 4.85 lb (2.2 kg) |
| Length: 33.5″ (85 cm) |
| Security Rating: Sold Secure Gold |
Hiplok Gold Chain Pros
- Unique wearable design, can be worn like a belt for easy transport.
- High level of portable security.
- Longer length offers greater locking versatility.
Hiplok Gold Chain Cons
- Slightly less secure than the Kryptonite Evolution Series 4.
- Heavier than the Kryptonite Evolution Series 4.
Both the Kryptonite Evolution Series 4 and the Hiplok Gold with their 10mm chain links, represent a step up in security from the Kryptonite KryptoLok Series 2, despite sharing the same Sold Secure Gold rating.
Kryptonite Evolution Series 4 1055 around front wheel
It’s worth noting that while both are Gold rated by Sold Secure, the Kryptonite Evolution has a 3-star rating from ART (suitable for motorcycles), whereas the Hiplok Gold has a 2-star rating, indicating slightly lower security between the two.
Hiplok Gold chain lock around back wheel
However, 10mm chains become heavy and less convenient to carry daily. This is where the Hiplok Gold’s wearable design provides a significant advantage. It can be comfortably worn around your waist like a belt.
Hiplok Gold Chain worn like belt
(Important: Do not lock the chain around your waist for safety reasons. A clip allows quick fastening and unfastening, and it adjusts to fit waists from 28” (71 cm) to 44” (112 cm) for a snug fit.)
The Hiplok Gold weighs 2.4 kg (5.3 lb), comparable to 6.5 cans of soda, which is substantial weight. However, when worn, it feels surprisingly unnoticeable.
The Hiplok Gold is available in one length: 33.5″ (85 cm), offering ample locking options. The more secure Kryptonite Evolution Series 4 comes in four lengths, from 21.5″ (55 cm) to 63.0″ (160 cm).
Kryptonite Evolution Series 4 1055 with Coke
For portable security, the shortest 21.5″ (55 cm) Kryptonite Evolution Series 4 is recommended. The 35.5″ (90 cm) version, closer in length to the Hiplok Gold, weighs a considerable 7.5 cans of soda, making it bulky and heavy to carry without the wearable design.
The shortest Kryptonite Evolution Series 4 is lighter than the Hiplok Gold at 2 kg (4.4 lb), equivalent to 5.5 cans of soda, while providing similar internal locking space to a standard u-lock with added chain flexibility.
Hiplok Gold chain with Coke
The choice boils down to the Hiplok Gold’s extra length and portability versus the Kryptonite Evolution Series 4 1055’s higher security and lighter weight (in the shortest version). For a nimble city bike, the Kryptonite might be preferable. For bulkier e-bikes, city bikes, or situations requiring locking multiple bikes, the Hiplok Gold’s length and wearable design might be more beneficial.
Consult the detailed, hands-on reviews of the Kryptonite Evolution Series 4 1055 Mini review and Hiplok Gold review for further insights.
4. Hiplok DXXL: Best For Ebike and Stationary Security
The Hiplok DXXL offers a high-security solution adaptable for both stationary and portable use, though it excels as a stationary lock. Primarily designed for home security, it’s ideal for securing bikes in sheds or garages.
Hiplok DXXL| Hiplok DXXL |
|---|
| Check price: > Check price at Amazon |
| Chain thickness: 14 mm |
| Weight: 13.46 lb (6.11 kg) |
| Length: 59″ (150 cm) |
| Security Rating: Sold Secure Diamond |
Hiplok DXXL Pros
- Extremely high security rating.
- Versatile for both stationary and portable security needs.
- Generous chain length and noose design maximize locking options.
Hiplok DXXL Cons
- Higher price point compared to other options.
Weighing in at a substantial 6.11 kg (13.46 lb), equivalent to 16.5 cans of soda, the Hiplok DXXL is not intended for daily portable carry.
Its 14mm chain links are exceptionally resistant to cropping, especially when employing locking techniques that keep the chain off the ground. The accompanying u-lock also features a robust 14mm shackle.
This combination provides exceptional security. Both the chain and u-lock (Hiplok DX) are Sold Secure Pedal Cycle Diamond rated, the highest rating available for bicycle locks.
Hiplok DXXL chain around bike
Despite a 39.0″ (100 cm) chain length, its noose design maximizes usable length, eliminating the need for doubling up the chain. The included u-lock further extends locking reach.
When paired with a ground or wall anchor like the Hiplok ANKR [Amazon], the Hiplok DXXL becomes a highly practical and secure home bike storage solution.
Furthermore, the Hiplok DXXL’s accompanying u-lock is a fully functional portable lock. A clip on the crossbar allows belt carrying, making it a favored mini u-lock for on-the-go security.
Hiplok DX around back wheel
The Hiplok DXXL thus offers both excellent stationary and viable portable security. While the Hiplok DX u-lock is compact, it might be suitable even for e-bikes, where the added weight of the chain and u-lock is less of a concern.
Detailed information on the u-lock can be found in the Hiplok DX review. A comprehensive review of the Hiplok XL chain is forthcoming.
5. Hiplok Mega Chain: The Ultimate Stationary Chain Lock for Bicycles and Motorbikes
While the Hiplok DXXL is ideal for most home security needs, the Hiplok Mega Chain represents the pinnacle of stationary chain lock security, surpassing even the DXXL in robustness.
Hiplok Mega Chain| Hiplok Mega Chain |
|---|
| Check price: > Check price at Amazon |
| Chain thickness: 22 mm |
| Weight: 27 lb (12.3 kg) |
| Length: 51″ (130 cm) |
| Security Rating: Unrated |
Hiplok Mega Chain Pros
- Highest level of chain lock security available.
- Noose design maximizes usable length.
- Compatible with high-security D1000 & DX1000 u-locks.
Hiplok Mega Chain Cons
- Very high cost.
- Extremely heavy and bulky.
- Incompatible with some ground anchors due to link size.
Theoretically, the Hiplok DXXL could be defeated by extremely large bolt cutters under specific conditions. For those demanding ultimate security, the Hiplok Mega Chain is the answer, especially with the exit of Pragmasis and Almax from the market. Its 22mm links are virtually uncroppable.
At 22mm, these are the thickest chain links available for bike locks, beyond which practicality diminishes significantly. This lock is as formidable as it gets.
The Hiplok Mega Chain weighs a staggering 12.3 kg (27 lb), equivalent to 33 cans of soda. It measures 51″ (130 cm) long and employs a noose design to maximize its effective length, similar to the DXXL.
Hiplok Mega Chain around motorbike
Notably, the Mega Chain does not include a lock. Its massive links might not fit through the openings of many ground anchors. Careful consideration is needed when choosing a lock and anchor pairing.
It is compatible with angle grinder-resistant u-locks like the Hiplok D1000 and DX1000 (and thus also the Litelok X1 and X3). You can loop the chain around your bike and secure the ends with one of these u-locks attached to a ground anchor.
Some ground anchors are large enough to accommodate the Mega Chain’s links. The maximum chain size compatibility is detailed in the guide to the best ground anchors.
Hiplok Mega Chain noose
Hiplok offers bundles combining the Mega Chain with the DX1000 u-lock, or with the DX1000 u-lock and A1000 ground anchor, providing price reductions of 6.5% and 8% respectively.
The Hiplok Mega Chain, when combined with the right lock and ground anchor, creates one of the most secure bicycle security setups imaginable.
How to choose a chain lock for your bicycle
Let’s delve into the critical factors to consider when selecting a bike chain lock, including a quiz to pinpoint your ideal security rating. We’ll also review a range of Sold Secure rated chain locks, from 6mm to 16mm link thicknesses.
The Chain
Chain quality varies significantly. For reliable security, chain links should be constructed from a high-grade, core hardened steel alloy that resists brittleness. Purchasing from reputable brands like Kryptonite, OnGuard, Abus, or Hiplok ensures this quality.
Chain link edges are typically rounded. However, some security chains now feature hexagonal or square links, purportedly making them harder for bolt cutters to grip by distributing pressure over a larger surface.
Hexagonal chain links
Round chain links
However, used bolt cutter blades often develop nicks that can catch on the edges of these shaped links, potentially making them easier to grip. In reality, these different shaped links offer no additional protection and might even be less secure than round links.
Ultimately, chain link thickness is the primary determinant of security.
| Chain Link Thickness | Bolt Cutter Resistance |
|---|---|
| < 10 mm | Yes (medium size bolt cutters) |
| 13 – 15 mm | Yes (only largest 36″ and 42″ bolt cutters) |
| ≥ 16 mm | No (hand-operated bolt cutters) |
Links under 10mm can be cut relatively easily with medium-sized bolt cutters, especially if the thief can achieve good leverage.
10-12mm links can sometimes be cut by medium bolt cutters if the thief is skilled and gains sufficient leverage.
13-15mm links are only vulnerable to the largest 42″ bolt cutters, which are uncommon among bike thieves.
Links 16mm and thicker are impervious to even the largest hand-operated bolt cutters.
Different chain link sizes
Regardless of thickness, the risk of chain cropping can be significantly reduced by keeping the chain as high off the ground as possible when locking your bike. Bolt cutters require ground leverage for effective chain cropping. Elevating the lock makes this leverage significantly harder to achieve and less effective.
The Lock
A chain lock is only as strong as its weakest component. A robust chain paired with a flimsy padlock defeats the purpose. Chain locks typically come with integrated locking mechanisms – padlocks, mini u-locks, or permanently integrated locks.
The locking mechanism should be reliable and resistant to leverage attacks, picking, pulling, and drilling.
Kryptonite New York disc lock
OnGuard Beast padlock
If a shackle is present, it should be as thick as (or thicker than) the chain links, or shrouded to prevent bolt cutter access.
Chain locks: Length vs Weight
A key advantage of chain locks over u-locks is their greater length, offering more options for securing your bike to various objects. However, length directly correlates with weight, and chain locks become very heavy quickly. Even lighter chains can be too cumbersome for comfortable backpack carry.
While luggage racks, baskets, or seat post wrapping are options, minimizing weight is crucial. Choose the shortest length that adequately meets your locking needs.
Measure out a length of rope to simulate chain length and test its suitability for your typical locking locations before purchasing.
Accept that chain locks will always be heavier than u-locks providing equivalent security.
| Kryptonite Kryptolok Chain Lock |
|---|
| Internal Space: 21.5″ (55 cm) |
| Weight: 3.90 lb (1.77 kg) |
| Security rating: 6/10 |
| Kryptonite Kryptolok U-Lock |
|---|
| Internal Space: 21.5″ (55 cm) |
| Weight: 2.85 lb (1.29 kg) |
| Security rating: 6/10 |
For example, the Kryptonite Kryptolock Series 2 u-lock weighs 2.85 lb (1.29 Kg). The lightest Kryptolock Series 2 chain lock at the same security level weighs 3.90 lbs (1.77 Kg), nearly a pound and 30% heavier. Both offer the same 21.5″ (55 cm) internal locking space. While chain flexibility is an advantage, it doesn’t dramatically increase locking options compared to a u-lock of the same internal space.
A more practical 37.5″ (95 cm) Kryptolock Series 2 chain lock weighs 5.55 lbs (2.52 Kg), almost double the u-lock’s weight.
Chain locks are inherently heavy. If weight is a primary concern, consider a u-lock or a folding lock instead.
Portable vs Stationary Chains
Distinguish between portable and stationary chain lock needs. Portable chains are for daily carry and street locking, while stationary chains remain at home or a fixed location for overnight or long-term security.
A “do-it-all” chain lock for both portable and stationary use compromises effectiveness in both scenarios. A two-lock system, using one for daily street use and a heavier one for home security, is generally the most secure and practical approach.
Choosing a portable chain lock
How secure should your chain lock be?
Sold Secure ratings are the best indicator of bike lock security. Sold Secure is an independent testing house that rates locks Bronze (least secure), Silver, Gold, or Diamond (most secure).
For more on Sold Secure and bike lock security assessment, consult the guide to choosing the best bike lock.
Quiz: What Security Level Do You Need?
(Please insert the quiz here as it was described in the original article)
Based on your quiz answers, aim for Silver, Gold, or Diamond rated locks. Avoid Bronze rated locks as they are insufficiently secure for any situation.
Security varies within each Sold Secure rating. Thicker chain links generally indicate higher security within a given rating level (Silver, Gold, Diamond).
How long should your chain lock be?
Chain locks excel in providing more locking options due to their flexibility and length compared to u-locks. Longer chains offer more versatility but add weight and cost.
Choose the shortest length necessary to secure your bike effectively. Use a rope to simulate chain length and determine the minimum required length for your usual locking scenarios.
How should you secure your bike with a portable chain?
Avoid using chain locks like u-locks, securing both frame and wheels close to the ground.
Chain lock close to the ground
Chains are more vulnerable to bolt cutters than u-locks, especially when close to the ground, where thieves can leverage the ground to cut the chain.
Kryptonite Kryptolok Chain Mini 955 around lamppost
Secure your frame tightly, wrapping the chain around the top tube to keep it elevated and shorter, reducing weight and maximizing security against bolt cutters.
Explore alternative wheel security methods wheel locks and seat locks. For detailed guidance, refer to how to lock your bike properly.
If you must secure frame and rear wheel with the chain, consider these options:
- Longer Chain: Wrap around top tube and through the wheel, keeping it elevated.
Chain lock further from the ground
- Seat Stays & Rear Wheel: Fasten through seat stays and rear wheel, keeping it off the ground.
Kryptonite Kryptolok Chain Mini 955 around seat stays
How will you carry your chain lock around?
Shorter, thinner chains can wrap around seat posts. Some brands offer frame-mounted chain bags. Wearable chain locks are also available.
Hiplok Gold chain lock belt
Consider seat post space, bag capacity, or wearable options before purchasing. Chains can be more challenging to carry than other lock types. Explore other lock carrying methods.
6 mm chain locks
Generally, 6mm chain locks are not recommended due to their easy vulnerability to cropping. They rarely achieve Sold Secure ratings above Bronze, which is inadequate for bike security.
However, the tex-lock is a unique exception. This 6mm chain encased in a thick textile cover resembles rope more than a chain lock.
Tex-lock eyelet with X-lock
The Tex-lock Eyelet chain lock combined with the X-lock, showcasing its unique textile-covered design and versatile locking system.
The textile cover provides added chain protection, and when paired with the Sold Secure Gold rated X-lock, it offers a versatile locking system.
In high-risk situations, use the X-lock for the frame and the chain for wheels. In low-risk situations, use the chain for the frame and the X-lock for a wheel, leveraging the chain’s length.
| Model | Weight | Cans of Coke | Length | Sold Secure rating | ART rating |
|---|---|---|---|---|---|
| Tex-Lock Eyelet and X-lock S | 1.42 kg(3.13 lb) | 4 | 31.5 “(80 cm) | Pedal Gold | 3 stars |
| Tex-Lock Eyelet and X-lock M | 1.69 kg(3.73 lb) | 4.5 | 47.2 “(120 cm) | Pedal Gold | 3 stars |
| Tex-Lock Eyelet and X-lock L | 1.94 kg(4.28 lb) | 5 | 63.0 “(160 cm) | Pedal Gold | 3 stars |
However, understand the security limitations. The textile-covered chain itself is not Sold Secure rated and is only suitable for brief stops in low-risk areas. The X-lock is narrow and only fits Sheffield-style bike stands or similar fixtures.
Review the full tex-lock review and the X-lock’s inclusion in the best lightweight bike lock list before purchasing.
Discount: Use “bestbikelock10” for 10% off Tex-lock products.
7 mm chain locks
7mm chain locks are at the lower threshold of acceptable bike protection. The Seatylock Viking Silver is the only 7mm chain with a Sold Secure Silver rating.
| Model | Weight | Cans of Coke | Length | Sold Secure rating | ART rating |
|---|---|---|---|---|---|
| Seatylock Viking Silver 90 | 1.35 kg(2.98 lb) | 3.5 | 35.4 “(90 cm) | Pedal Silver | |
| Seatylock Viking Silver 110 | 1.6 kg(3.53 lb) | 4.5 | 43.3 “(110 cm) | Pedal Silver | |
| Seatylock Viking Silver 140 | 1.95 kg(4.3 lb) | 5 | 55.1″(140 cm) | Pedal Silver |
For low-risk scenarios, a 7mm chain might suffice. Limit unattended time and prioritize proper locking technique.
Avoid using 7mm chains like u-locks, as ground proximity increases bolt cutter vulnerability.
Seatylock Viking Silver 90 around top tube
Wrap the chain tightly around the top tube and the object you’re locking to, keeping it elevated to hinder bolt cutter attacks. While large bolt cutters and strength could still crop 7mm chains even without ground leverage, most bike thieves lack these.
Use alternative wheel security methods to avoid compromising the entire bike.
8 mm chain locks
8mm chains offer slightly improved security over 7mm but still typically only achieve Sold Secure Silver ratings.
| Model | Weight | Cans of Coke | Length | Sold Secure rating | ART rating |
|---|---|---|---|---|---|
| Abus Steel-O-Chain9808 85 | 1.75 kg(3.86 lb) | 4.5 | 33.46 “(85 cm) | Pedal Silver | 2 stars |
| Abus Steel-O-Chain9808 110 | 2.55 kg(5.62 lb) | 7 | 43.3 “(110 cm) | Pedal Silver | 2 stars |
| Abus Steel-O-Chain9808 140 | 2.8 kg(6.17 lb) | 7.5 | 55.11 “(140 cm) | Pedal Silver | 2 stars |
| Abus Steel-O-Chain9808 170 | 3.21 kg(7.08 lb) | 8.5 | 66.93 “(170 cm) | Pedal Silver | 2 stars |
| Abus Iven Chain8210 85 | 1.93 kg(4.26 lb) | 5 | 33.0 “(85 cm) | Pedal Silver | 2 stars |
| Abus Iven Chain8210 110 | 2.5 kg(5.5 lb) | 6.5 | 43.0 “(110 cm) | Pedal Silver | 2 stars |
| Hiplok Original | 1.8 kg(3.97 lb) | 5 | 33.46 “(85 cm) | Pedal Silver | 2 stars |
| Hiplok Homie Silver | 2.6 kg(5.73 lb) | 7 | 47.24 “(120 cm) | Pedal Silver | 2 stars |
| Squire DCL1 J3Chain Lock | 1.7 kg(3.75 lb) | 4.5 | 36.02 “(91.5 cm) | Pedal Silver | |
| Oxford Chain 8 | 2.0 kg(4.5 lb) | 5.5 | 39.37 “(100 cm) | Pedal Silver | |
| Trelock BC 480 110 | 1.9 kg(4.19 lb) | 5 | 43.3 “(110 cm) | Pedal Silver | |
| AXA Absolute 8-90 | 1.74 kg(3.84 lb) | 4.5 | 35.43 “(90 cm) | Pedal Silver | |
| AXA Absolute 8-110 | 1.96 kg(4.32 lb) | 5.5 | 43.3 “(110 cm) | Pedal Silver | |
| Squire Chainlok 8 | 1.8 kg(3.97 lb) | 5 | 33.5 “(85 cm) | Pedal Silver | |
| Squire J3 | 1.73 kg(3.81 lb) | 4.5 | 36 “(91.5 cm) | Pedal Silver | |
| Abus Ionus8900 | 2.08 kg(1.86 lb) | 5.5 | 43.3 “(110 cm) | Pedal Silver | 2 stars |
| Linka Lasso 8 | 1.8 kg(3.9 lb) | 5 | 39.4 “(100 cm) | Pedal Silver | 2 stars |
The Hiplok Original [Amazon] is a standout 8mm chain lock with a good weight-to-length ratio and a wearable belt design.
Hiplok Original chain lock demonstrating its wearable design, offering a convenient way to carry the lock.
The Hiplok Homie Silver is designed for stationary home use, but better home security requires thicker chains. Note the increasing weight of 8mm locks, some exceeding the weight of Sold Secure Gold rated u-locks.
Like 7mm chains, secure 8mm chains by tightly wrapping around the top tube or seat stays to minimize ground proximity and bolt cutter vulnerability.
9 mm chain locks
9mm chains offer significantly improved security, with many achieving Sold Secure Gold ratings. However, Gold ratings often come with a 2/5 rating from ART, placing them at the lower end of the Gold security spectrum.
| Model | Weight | Cans of Coke | Length | Sold Secure rating | ART rating |
|---|---|---|---|---|---|
| Kryptonite KryptoLok Series 2 990 Combo Chain | 2.65 kg(5.85 lb) | 7 | 35.5 “(90 cm) | Pedal Gold | |
| Kryptonite KryptoLok Series 2 912 Combo Chain | 3.33 kg(7.35 lb) | 9 | 47.3 “(120 cm) | Pedal Gold | |
| Kryptonite KryptoLok Series 2 955 Mini Integrated Chain | 1.77 kg(3.90 lb) | 4.5 | 21.5 “(55 cm) | Pedal Gold | 2 stars |
| Kryptonite KryptoLok Series 2 995 Integrated Chain | 2.52 kg(5.55 lb) | 7 | 37.5 “(95 cm) | Pedal Gold | 2 stars |
| Kryptonite KryptoLok Series 2 912 Integrated Chain | 3.04 kg(6.7 lb) | 8 | 47.3 “(120 cm) | Pedal Gold | 2 stars |
| Kryptonite KryptoLok Series 2 915 Integrated Chain | 3.67 kg(8.10 lb) | 10 | 60.0 “(150 cm) | Pedal Gold | 2 stars |
| Abus CityChain 1010 85 | 1.95 kg(4.3 lb) | 5 | 33.0 “(85 cm) | Pedal Gold | |
| Abus CityChain 1010 110 | 2.4 kg(5.29 lb) | 6.5 | 43.0 “(110 cm) | Pedal Gold | |
| Abus CityChain 1010 140 | 2.74 kg(6.04 lb) | 7.5 | 55.0 “(140 cm) | Pedal Gold | |
| Abus CityChain 1010 170 | 3.38 kg(7.45 lb) | 9 | 67.0 “(170 cm) | Pedal Gold | |
| Axa Cherto 95 | 2.16 kg(4.76 lb) | 6 | 37.4 “(95 cm) | Pedal Gold | |
| AXA Absolute 9-90 | 2.24 kg(4.94 lb) | 6 | 35.4 “(90 cm) | Pedal Gold | 2 stars |
| AXA Absolute 9-110 | 2.73 kg(6.02 lb) | 7.5 | 43.3 “(110 cm) | Pedal Gold | 2 stars |
| AXA Newton ProMOTO-2 | 2.35 kg(5.18 lb) | 6.5 | 39.37 “(100 cm) | Pedal Gold | |
| Milenco Coleraine Chain Lock 100 | 2.4 kg(5.29 lb) | 5 | 39.37 “(100 cm) | Pedal Gold | |
| Milenco Coleraine Chain Lock 140 | 2.98 kg(6.57 lb) | 8 | 55.1 “(140 cm) | Pedal Gold | |
| Milenco Coleraine Chain Lock 180 | 3.90 kg(8.6 lb) | 10.5 | 70.87 “(180 cm) | Pedal Gold | |
| Trelock BC 580 | 2.2 kg(4.85 lb) | 6 | 43.3 “(110 cm) | Pedal Gold | 2 stars |
The Kryptonite Kryptolok Series 2 is recommended. Abus CityChains [Amazon] are also excellent, offering better weight-to-length ratios, but Kryptonite chains are usually more affordable and offer optional anti-theft protection for bikes up to $1,500 / £800.
9mm locks are heavy. Even the short Series 2 955 weighs over 4 cans of soda. Consider carry cases or frame bags for longer chains.
10 mm chain locks
10mm chains approach the limit of portable security, being very heavy for daily mobile use.
| Model | Weight | Cans of Coke | Length | Sold Secure rating | ART rating |
|---|---|---|---|---|---|
| Master Lock 8234 | 2.3 kg(5.07 lb) | 6 | 35.43 “(90 cm) | Pedal Silver | |
| Kryptonite Evolution Series 4 1055 | 2 kg(4.4 lb) | 5.5 | 21.5 “(55 cm) | Pedal Gold | 3 stars |
| Kryptonite Evolution Series 4 1090 | 2.77 kg(6.10 lb) | 7.5 | 35.5 “(90 cm) | Pedal Gold | 3 stars |
| Kryptonite Evolution Series 4 1016 | 4.40 kg(9.70 lb) | 12 | 63.0 “(160 cm) | Pedal Gold | 3 stars |
| OnGuard Mastiff 8019 | 3.04 kg(6.7 lb) | 8 | 43.0 “(110 cm) | Pedal Gold | |
| OnGuard Mastiff 8019L | 4.76 kg(10.5 lb) | 13 | 72.0 “(183 cm) | Pedal Gold | |
| Abus Granit CityChain X-Plus 1060 85 | 2.1 kg(4.63 lb) | 5.5 | 33.0 “(85 cm) | Pedal Gold | 3 stars |
| Abus Granit CityChain X-Plus 1060 110 | 2.65 kg(5.84 lb) | 7 | 43.0 “(110 cm) | Pedal Gold | 3 stars |
| Abus Granit CityChain X-Plus 1060 140 | 3.26 kg(7.19 lb) | 8.5 | 55.0 “(140 cm) | Pedal Gold | 3 stars |
| Abus Granit CityChain X-Plus 1060 170 | 3.75 kg(8.27 lb) | 10 | 67.0 “(170 cm) | Pedal Gold | 3 stars |
| Abus Ivy Chain 9100 85 | 2.45 kg(5.4 lb) | 6.5 | 33.0 “(85 cm) | Pedal Gold | |
| Abus Ivy Chain 9100 110 | 2.9 kg(6.4 lb) | 8 | 43.0 “(110 cm) | Pedal Gold | |
| Abus Ivy Chain 9100 140 | 3.85 kg(8.49 lb) | 10.5 | 55.0 “(140 cm) | Pedal Gold | |
| Abus Ivy Chain 9100 170 | 4.85 kg(10.69 lb) | 13 | 67.0 “(170 cm) | Pedal Gold | |
| Hiplok Gold | 2.4 kg(5.3 lb) | 6.5 | 33.5 “(85 cm) | Pedal Gold | 2 stars |
| Hiplok Homie | 4.6 kg(10.14 lb) | 12.5 | 59 “(150 cm) | Pedal Gold | 2 stars |
| Hiplok EDX | 3.5 kg(7.72 lb) | 9.5 | 39.37 “(100 cm) | Pedal Gold | |
| Oxford HD Loop Chain Lock | 2.81 kg(6.19 lb) | 7.5 | 47.2 “(120 cm) | Pedal Gold | |
| Seatylock Viking 90 | 2.4 kg(5.3 lb) | 6.5 | 35.4 “(90 cm) | Pedal Gold | |
| Seatylock Viking 110 | 2.8 kg(6.2 lb) | 7.5 | 43.3 “(110 cm) | Pedal Gold | |
| Seatylock Viking 140 | 3.40 kg(7.5 lb) | 9 | 55.1 “(140 cm) | Pedal Gold | |
| Zefal K-Traz M18 | 3.25 kg(7.17 lb) | 8.5 | 43.3 “(110 cm) | Pedal Gold | |
| Yale YCL3 Chain Lock 110 | 3.15 kg(6.94 lb) | 8.5 | 43.3 “(110 cm) | Pedal Gold | |
| Yale YCL3 Chain Lock 180 | 4.63 kg(10.2 lb) | 12.5 | 70.8 “(180 cm) | Pedal Gold | |
| Pewag VKK10x35 Chain | 2.93 kg(6.46 lb) | 8 | 39.97 “(100 cm) | Pedal Gold | |
| Burg Wachter 1010S | 2.02 kg(4.45 lb) | 5.5 | 39.97 “(100 cm) | Pedal Gold | |
| Burg Wachter 1015S | 2.94 kg(6.48 lb) | 8 | 59.6 “(150 cm) | Pedal Gold | |
| Burg Wachter 1020S | 3.96 kg(8.73 lb) | 10.5 | 78.74 “(200 cm) | Pedal Gold | |
| Squire Warrior 55CS Chain 1200 | 4.05 kg(8.93 lb) | 11 | 47.28 “(120 cm) | Pedal Gold | |
| Squire Warrior Combi 55CS 1200 | 4.07 kg(8.97 lb) | 11 | 47.28 “(120 cm) | Pedal Gold | |
| Oxford Chain 10 | 3.3 kg(7.28 lb) | 9 | 55.11 “(140 cm) | Pedal Gold | |
| Oxford HD Chain | 3.37 kg(7.43 lb) | 9 | 59 “(150 cm) | Pedal Gold | |
| OnGuard Mastiff 8019LP | 3.67 kg(8.1 lb) | 10 | 51.18 “(130 cm) | Pedal Gold | |
| Squire Stronghold IC850 | 3.26 kg(7.19 lb) | 8.5 | 85 cm | Pedal Diamond | |
| Kryptonite EvolutionSeries 4 1012 | 3.08 kg(6.8 lb) | 8.5 | 47.25 “(120 cm) | Pedal Gold | |
| Squire G3 | 2.79 kg(6.15 lb) | 7.5 | 36 “(91.5 cm) | Powered Gold |
The Hiplok Homie [Amazon] is designed for home use, securing multiple bikes. For mobile security, the Hiplok Gold [Amazon] excels in portability.
For locking speed, consider the Kryptonite Evolution Series 4 1055 Mini [Amazon], Abus Granit CityChain X-Plus 1060/85 [Amazon], or Seatylock Viking Gold with integrated locks. The Seatylock Viking [Amazon] range features a magnetic mechanism for easier locking.
See reviews of the Hiplok Gold and Kryptonite Evolution chain lock.
A chain lock for the street and the home?
Locks in this category compromise on both portability and stationary security.
12 mm chain locks
12mm chains are at the limit of portable security, being very heavy but offering high security.
| Model | Weight | Cans of Coke | Length | Sold Secure rating | ART rating |
|---|---|---|---|---|---|
| Kryptonite New York Chain 1210 | 3.92 kg(8.65 lb) | 10.5 | 39.0 “(100 cm) | Pedal Gold | |
| Kryptonite New York Chain 1217 | 5.96 kg(13.15 lb) | 16 | 67.0 “(170 cm) | Pedal Gold | |
| Kryptonite New York Noose 1275 | 3.15 kg(6.95 lb) | 8.5 | 30.0 “(75 cm) | Pedal Gold | |
| Kryptonite New York Noose 1213 | 4.79 kg(10.55 lb) | 13 | 51.0 “(130 cm) | Pedal Gold | |
| Oxford HD Max Chain 120 | 2.54 kg(5.60 lb) | 7 | 47.2 “(120 cm) | Pedal Gold | |
| Oxford HD Max Chain 150 | 3.58 kg(7.89 lb) | 9.5 | 59.1 “(150 cm) | Pedal Gold | |
| Oxford HD Max Chain 200 | 4.77 kg(10.52 lb) | 13 | 78.7 “(200 cm) | Pedal Gold | |
| OKG Noose Chain Lock 80 | 3.9 kg(8.6 lb) | 10.5 | 31.5 “(80 cm) | Pedal Gold | |
| OKG Noose Chain Lock 120 | 5.12 kg(11 lb) | 13.5 | 47.28 “(120 cm) | Pedal Gold | |
| OKG Noose Chain | 3.4 kg / metre(7.5 lb) | 9 | 0.8 m, 1.0 m1.2 m, 1.5 m | Pedal Gold | |
| Magnum Plus Goliath HLKM102 | 2 kg(4.4 lb) | 5.5 | 43.3 “(110 cm) | Pedal Gold | |
| Milenco Coleraine 12 | 4.96 kg(10.93 lb) | 13.5 | 1 m1.4 m1.8 m | Pedal Diamond | |
| Milenco Dundrod 12 | 3.87 kg +(8.53 lb) + | 10.5 | 1 m1.4 m1.8 m | Pedal Diamond | |
| Oxford Monster 12 | 5.20 kg +(11.46 lb) + | 14 | 1.2 m1.5 m2.0 m | Pedal Diamond | |
| Oxford Patriot | 4 kg +(8.82 lb) + | 10.5 | 1.2 m1.5 m2.0 m | Pedal Diamond | 4 stars |
They offer Sold Secure Gold or Diamond ratings and high ART ratings (3/5 or 4/5), suitable for motorbikes and e-bikes, surpassing most u-locks in security. However, they can still be cropped with 42″ bolt cutters and ground leverage. Keep them elevated.
The Kryptonite New York Noose [Amazon] is the best 12mm chain lock, using a noose design to maximize length and reduce weight.
The Kryptonite New York Noose 1275 chain lock, highlighting its noose design which increases effective length and locking versatility.
See the Kryptonite New York Noose 1275 review. Longer 12mm locks are best for stationary home security. The Kryptonite New York [Amazon] chain lock is a good stationary option with various lengths and a 14mm shackle disc lock, offering anti-theft protection up to $3,500 / £1300.
Choosing a stationary chain lock
For home security, focus on maximum security, not portability. Get the thickest chain lock you can afford.
14 mm chain locks
14mm chains are for stationary use, too heavy for regular portable carry.
| Model | Weight | Cans of Coke | Length | Sold Secure rating | ART rating |
|---|---|---|---|---|---|
| Kryptonite New York Fahgettaboudit Chain 1410 | 4.90 kg(10.80 lb) | 13 | 39.0 “(100 cm) | Powered Gold, Pedal Diamond | |
| Kryptonite New York Fahgettaboudit Chain 1415 | 6.92 kg(15.25 lb) | 18.5 | 60.0 “(150 cm) | Powered Gold, Pedal Diamond | |
| Milenco Dundrod Chain Lock | 5.6 kg(12.35 lb) | 15 | 39.37 “(100 cm) | Powered Gold, Pedal Diamond | |
| Hiplok XL Noose | 5 kg(11 lb) | 13.5 | 39.0 “(100 cm) | Pedal Diamond | |
| Hiplok DXXL Noose and U-lock | 6.11 kg(13.46 lb) | 16.5 | 39.0 “(100 cm) | Pedal Diamond | |
| Milenco Dundrod 14 | 5.02 kg +(11.07 lb) + | 13.5 | 1 m1.4 m1.8 m | Pedal Diamond | |
| OnGuard 8016 Beast | 6.71 kg(14.8 lb) | 18 | 43 “(110 cm) | ||
| OnGuard 8016L Beast | 9.98 kg(22 lb) | 27 | 72 “(183 cm) |
The lightest 14mm chain lock weighs as much as 13 cans of soda. They offer very high security. The Kryptonite New York Fahgettaboudit is both Sold Secure Bicycle Diamond and Motorcycle Gold rated. They can be cropped by very large bolt cutters, but it requires skill, weight, and proper chain positioning. Keep chains elevated, possibly using a wall anchor in sheds or garages.
Kryptonite New York Fahgettaboudit chains offer a 15mm shackle, maximum in-house security, and anti-theft protection up to $3,750 / £2000.
OnGuard Beast 8017
The OnGuard Beast 8017 chain lock, known for its robust security and often more affordable price point.
OnGuard Beast chains offer a 14mm, quadruple locking shackle, and high in-house security ratings but lack Sold Secure ratings and reliable after-sales support. They are typically more affordable than Kryptonite.
The Hiplok DXXL Noose, with its portable u-lock component, is also a top choice.
15 mm chain locks
15mm chain locks are rare. The Kryptonite New York Legend is excellent but hard to find.
| Model | Weight | Cans of Coke | Length | Sold Secure rating | ART rating |
|---|---|---|---|---|---|
| Artago Stone 68T100 | 3.39 kg(7.48 lb) | 9 | 39.0 “(100 cm) | Powered Gold | |
| Kryptonite New York Legend Chain 1590 | 4.31 kg(9.50 lb) | 11.5 | 36 “(90 cm) | 5 stars | |
| Kryptonite New York Legend Chain 1515 | 7.23 kg(15.95 lb) | 19.5 | 60 “(150 cm) | 5 stars |
Theoretically, 15mm chains can still be cropped, but it’s extremely rare. The Kryptonite New York Legend has a maximum 5/5 ART rating and is one of the strongest bicycle locks available.
It features a 16mm shrouded shackle and anti-theft protection up to $4500 / £2500.
The Kryptonite New York Legend 1515 chain lock, renowned as one of the most secure bicycle chain locks widely available.
The Kryptonite New York Legend review provides more detail. The Artago Stone 68T100 is another impressive option, but untested.
16 mm chain locks
16mm chains are uncroppable by manual bolt cutters, requiring power tools to defeat.
| Model | Weight | Cans of Coke | Length | Sold Secure rating | ART rating |
|---|---|---|---|---|---|
| Pragmasis Protector 16 mm | 4.5 kg / metre(9.92 lb) | 12 | 0.8 – 6 m | Pedal Diamond | |
| Oxford Nemesis | 6.76 kg(14.9 lb) | 18 | 59 “(150 cm) | Powered Gold, Pedal Diamond | |
| Oxford Nemesis | 8.55 kg(18.8 lb) | 23 | 78.7 “(200 cm) | Powered Gold, Pedal Diamond | |
| Almax Immobiliser Series III | 4.15 kg(9.15 lb) | 11 | 28 “(700 cm) | ||
| Almax Immobiliser Series III | 7.75 kg(17.09 lb) | 21 | 60″(150 cm) | ||
| Almax Immobiliser Series III | 10 kg(22.05 lb) | 27 | 79 “(200 cm) | ||
| Almax Immobiliser Series III | 12.25 kg(27 lb) | 33 | 98 “(250 cm) | ||
| Pragmasis Protector | 5.5 kg(12.13 lb) | 15 | 39 “(100 cm) | Pedal Diamond | |
| Pragmasis Protector | 7.75 kg(17.09 lb) | 21 | 60 “(150 cm) | Pedal Diamond | |
| Pragmasis Protector | 10 kg(22.05 lb) | 27 | 79 “(200 cm) | Pedal Diamond | |
| Pragmasis Protector | 12.25 kg(27 lb) | 33 | 98 “(250 cm) | Pedal Diamond | |
| Squire TC16 5 | 8.44 kg(18.61 lb) | 22.5 | 59 “(150 cm) | Powered Gold |
They are extremely heavy and non-portable. Avoid bike damage due to their weight. Pragmasis and Almax, top 16mm chain brands, are no longer in business, limiting options. The Oxford Nemesis is a viable option, or consider the 22mm Hiplok Mega Chain for ultimate security.
Best Chain Lock Summary
Bike chain locks are categorized into:
- Portable Chain Locks: For daily carry and street locking (links < 13mm).
- Stationary Chain Locks: For home or fixed location security (links > 13mm).
Portable Chain Locks
Portable chains are heavier than u-locks but offer advantages:
- Versatility: Secure to wider objects.
- Portability: Can be wrapped around seat posts.
- Attack Resistance: Resist leverage attacks and are harder to angle grind.
However, portable chains with links can be cropped by bolt cutters if near the ground. Secure bikes by tightly wrapping the chain around the top tube or seat stays, keeping it elevated.
Check weights carefully; even short portable chains are heavy. If weight is a major issue, choose a u-lock.
Hiploks offer good security-to-weight ratios and wearable options. For low-risk situations, the Seatylock Viking Silver is suitable. For medium risk, Kryptonite Kryptoloks or Abus CityChains are better. For high risk, consider the Kryptonite Evolution Series 4 1055 Mini, Hiplok Gold, or Kryptonite New York Noose.
Stationary Chain Locks
Stationary chains (links > 13mm) are best for immobile, overnight security due to:
- Security: Resist bottle jacks, leverage attacks, angle grinders, and manual bolt cutters (if > 15mm links).
- Practicality: Work well with ground anchors, ideal for sheds and garages, and can secure multiple bikes.
Use ground or wall anchors for maximum security. Ensure your anchor and locking technique are as robust as the chain lock. See how to lock your bike properly.
Choose the thickest stationary chain lock you can afford for home security.
Regularly clean and lubricate your chain lock to prevent jamming stop it jamming.
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