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Security comes first
This lock offers security for your bike, without distracting you with a fancy design or gimmicks. We have assembled only the most secure components in this security chain lock. For example, the lock features a chain with 4-edge links, which protect against bolt cutters because of the larger diameter length.
Hardened steel - a must-have!
The hardness of your chain lock is crucial when it comes to resist bolt cutters and metal saws. Thus, when it comes to the steel in your lock, we make no compromises. For example, using very lightweight steel would easily reduce the weight of this lock by 1.5 lbs / 700 grams, but unfortunately it would also lower the protection level to a degree that we could not recommend it for high-quality bikes and motorbikes. Consequently, for our locks, we choose only solid special steel that was additionally hardened at very high temperatures. This crucial security feature raises the chain lock weight to considerable 5.5 lbs / 2.5 kilo. Nevertheless, as we like to say: better massive than sorry.
Flexible locking thanks to extra-long chain
When locking your bike, length naturally plays a decisive role. The longer the lock, the more securely it can be locked to a fixed object - ideally by locking both the bike frame AND the wheels. This KOHLBURG lock has an extra-long 4 feet chain, which allows flexible locking without much effort, even to particularly wide objects such as street lamps or even trees.
No thieve in the world can break this lock!
Sorry, unfortunately, that is not true. And we are honest with you as we want you to correctly evaluate the risk for your lovely bike to take the best measures. Of course, other lock producers promise unbreakable protection, but this is simply not possible for any bicycle lock - no matter how big (just think of a thief with an angle grinder and enough time to spare).
What we offer to you is the highest possible security for a lock that can be conveniently carried with your bike. To make a long story short: There is no better way to keep your bike in your hands than with this security chain lock.
The advantages of the KOHLBURG chain lock type Helsinki at a glance:
- massive hardened special Titanium steel - important against bolt cutters
- secure lock cylinder with car security standard - protection against lock-picking
- extra-long 4 feet / 47 inch / 120 cm length - for easy locking of frame & front wheel
- chain with 0.33" / 8.3 mm strong 4-edge links - highest security level against bolt cutters & hacksaws
- a soft and robust chain sleeve covers the chain to protect your bike’s varnish
- lock weight: 5.5 lbs / 2500 grams - please only buy this lock if this weight is acceptable to you
- diameter of the lock head (widest part of the lock): 1.6" / 4 cm
- 4 keys included
- for high-quality bicycles, e-bikes & motorbikes
Customer
Reviewed in the United States on February 8, 2025
Heavy which is to be expected. Quick to lock and unlock. I feel confident when leaving the bikes for a short lunch or run into a local store. If we are going to be out of sight or longer we use 4 layers of defense. One of these chain locks on each bike, a U shaped lock for each and then cable the two bikes together. The fourth is a loud alarm with the sensitivity dialed back to avoid false alarms. The hope is someone else’s bike looks easier to take or it requires more than tin snips the cut away all the junk.
Matteo
Reviewed in Italy on January 19, 2025
Robusto.
Arvid Kingl
Reviewed in the United Kingdom on January 10, 2025
I recently purchased this chain lock with Sold Secure Gold certification, and I couldn’t be happier with my choice. At 120 cm long, it’s the perfect length to lock both the bike frame and rear wheel securely to a bike rack or railing. This gives me peace of mind, especially when leaving my bike in high-risk areas.Yes, it’s a bit over 2 kg, so it’s on the heavier side, but that’s a small trade-off for the serious protection it offers. The weight actually feels reassuring—it’s clear this lock is built to withstand serious attempts at theft. The chain links and lock mechanism exude quality, and you can tell a lot of thought went into its design. 5-star recommendation from my side.
Daniell
Reviewed in Sweden on September 28, 2024
Chain is long enough for my use, heavy but that was expected, very happy from purchase, time will show if it is safe enough :) (as for now would reccomend !)
Dylan
Reviewed in the United States on September 11, 2024
This bike lock is very good! As somebody who's new to the whole bike world, finding a lock and what would prevent theft was pretty difficult.One thing to understand if you're in the same boat I was, don't buy cheap locks. Don't buy weak locks either! Chain locks are probably one of the best you can get, unless you plan on getting those anti-angle grinder locks that cost easily half the price of your bike, these heavy-duty chain locks work very well!It's less about how easy it is to break into, but rather how good of a deterrent it can be. When a thief is carrying around some bolt cutters, he's going to be looking for the easiest lock to cut through. He won't spend 4+ minutes gnawing away at your 0.33" chain lock just to get your bike, especially at the risk of getting the police called on him. If you live in a busy city like Chicago, New York, or London, you're definitely gonna need some more serious security.For me, this lock is perfect. I use my bike to commute around my city. I live in a populated area that has a decent amount of crime, just outside of Detroit, sort of known for theft. I leave my bike outside the gym (nobody wants to steal a bike from a gym, let's be honest) for about an hour, and it's completely fine. I'll go shopping at my local grocery store for about 15 minutes and it's completely fine.If you're in a similar situation to me, a city (decently small, but larger than 50,000 people) and has a reputation for theft, then this is a totally perfect bike. BUT! By no means is this secure enough to use to leave outdoors for more than 3 hours, especially overnight. In that time, any guy can run back home, grab his angle grinder and a few blades, and get through this lock in probably 3-4 minutes. If you absolutely NEED an overnight lock, I suggest getting some that are made out of anti-angle grinder materials. They'll run you $250+, but will make it worth your while, as it'll gnaw away at the perp's saw blade before it'll gnaw away at the lock itself. Either this, or you can get one that plays a loud alarm when moved.Now, one of my only complaints about the lock is the plastic housing on it. The part that holds the locking mechanism is a cheap sort of plastic that will chip away every time that it hits the pavement. And, if you're clumsy like I am, you're bound to drop this thing on pavement hundreds of times. Even just dragging it against the pavement is going to make it look like it escaped a tiger's den! This isn't that big of a deal as you can just be more careful with it, and so far it hasn't brought any issues as far as I'm aware.
Customer
Reviewed in the United States on July 29, 2024
Chain is a little on the heavy side but it is worth every penny. I able to lock up two bikes with ease.
nahpetsbe
Reviewed in Germany on July 24, 2024
### Produktrezension: KOHLBURG Sicherheits-Kettenschloss**Produkt:** KOHLBURG Sicherheits-Kettenschloss - Schloss 125cm lang mit 8,3mm starker 4-Kantkette**Einleitung:**Das KOHLBURG Sicherheits-Kettenschloss ist ein robustes und zuverlässiges Schloss, das entwickelt wurde, um Fahrräder und andere wertvolle Gegenstände effektiv vor Diebstahl zu schützen. Mit einer Länge von 125 cm und einer 8,3 mm starken 4-Kantkette bietet dieses Schloss eine hohe Sicherheit, ideal für den Einsatz in städtischen Gebieten oder an Orten mit erhöhtem Diebstahlrisiko.**Verpackung und Design:**Das Schloss wird gut verpackt geliefert, mit klaren Anweisungen zur Verwendung. Das Design des Schlosses kombiniert Funktionalität mit robustem Schutz. Die 4-Kantkette ist mit einer schützenden Hülle überzogen, die das Fahrrad vor Kratzern bewahrt und gleichzeitig die Kette vor Witterungseinflüssen schützt. Das Schloss selbst ist kompakt und einfach zu bedienen, mit einem langlebigen Schließmechanismus.**Material und Sicherheit:**Die 8,3 mm starke Kette besteht aus gehärtetem Stahl, der widerstandsfähig gegen Bolzenschneider und andere gängige Werkzeuge ist, die von Dieben verwendet werden. Die 4-Kantkonstruktion der Kette erhöht die Sicherheit zusätzlich, da sie schwerer zu durchtrennen ist als runde Ketten. Die Länge von 125 cm ermöglicht es, das Fahrrad an festen Objekten zu sichern, was die Sicherheit erhöht.**Vorteile:**- **Hohe Sicherheit:** Die 8,3 mm starke 4-Kantkette bietet einen hohen Schutz gegen Diebstahl.- **Robustes Design:** Gehärteter Stahl und eine schützende Hülle sorgen für Langlebigkeit und Witterungsbeständigkeit.- **Benutzerfreundlichkeit:** Das Schloss ist einfach zu bedienen und der Schlüsselmechanismus funktioniert zuverlässig.- **Länge:** Mit 125 cm Länge bietet das Schloss genug Flexibilität, um Fahrräder an festen Objekten zu sichern.**Nachteile:**- **Gewicht:** Aufgrund der robusten Bauweise kann das Schloss relativ schwer sein, was den Transport erschweren kann.- **Schlüsselabhängigkeit:** Wie bei vielen Kettenschlössern besteht das Risiko, den Schlüssel zu verlieren, was den Zugang zum Fahrrad erschweren kann.**Fazit:**Das KOHLBURG Sicherheits-Kettenschloss bietet eine ausgezeichnete Sicherheitslösung für Fahrradbesitzer, die Wert auf robuste und zuverlässige Diebstahlsicherung legen. Die starke 4-Kantkette und das langlebige Material machen es zu einer effektiven Abschreckung für potenzielle Diebe. Obwohl das Gewicht ein kleiner Nachteil sein kann, überwiegt der Schutz, den dieses Schloss bietet. Es ist besonders geeignet für den Einsatz in städtischen Gebieten und anderen Orten, an denen Fahrräder oft unbeaufsichtigt gelassen werden müssen.
Baron
Reviewed in France on June 27, 2024
Chaîne bien évidemment un peu lourde mais de très bonne qualité : l’enveloppe en toile est résistante et la serrure n’est pas en fer blanc. La longueur permet de faire le tour d’un beau poteau de 20 cm ce qui fait la différence quand les places sont rares.
JJ Tramm
Reviewed in the United States on May 28, 2024
Have been using this lock for a bit over a year now. I live in a small city and have not had any issues using this as my primary lock for an E-bike though I also use a folding lock as a secondary/helmet lock and have a motion sensor alarm. I do believe this thick, heavy chain is a deterrent and would tend to make someone who is inclined to steal a bike look for an easier score. Just be careful not to drop the lock with the key in it as the weight of this chain hitting concrete can cause the key to bend.
Malia Lewis
Reviewed in the United States on February 24, 2024
As others have mentioned, this is a hefty lock! It’s heavy and pricey and the locking mechanism doesn’t always turn without some wiggling, jiggling, cajoling, and occasionally threats. I never struggle to unlock it, but the rubber creeps up the chain section and makes getting it locked the very last straw if you happen to be running late.That said, I very much still have the bike for which I use this lock and I have always been able to find places to park it because the lock is so versatile. Bike racks, trees, pipes, sign posts, hub cap spokes, a sleeping camel - this chain can wrap around just about anything if it stays stationary long enough and still have your bike waiting there for you when you get back.
Caden
Reviewed in the United States on December 9, 2024
This product is one of the better chain locks out there, and there is a good amount of length so that you can attach it to most things. The only downside is that it is a bit heavy, although that's probably due to the strength and quality of the chain.I've watched videos of people cutting through this and it takes several minutes and also a replacement blade to do so, as the first one would become dull trying to cut through it. Therefore this lock would make it exceedingly difficult for any thief to get through, especially in a public place where there are other people around...Overall this one get's the job done!
rdc
Reviewed in the United States on December 4, 2024
So far my bike has not been stolen and this heavy chain lock looks formidable. BUT, it takes a lot of jiggling to lock it. Additional lubrication helps, but is not sufficient. I worry that the lock won't lock when needed. Unlocking can require a bit of jiggling, but locking is the problem. Have to repeatedly reset the link and jiggle the key; often the catch closes by itself while trying to get the link in. I would probably not buy this again, but too much hassle to replace it.
Stan
Reviewed in the United States on October 24, 2024
I had used a cable lock previously but learned how easy they are to cut. This chain is beafier than the cable lock and should be able to slow up a thief. At 5 lbs. I can still carry it in my bag on the rack of my electric bike. Now I use this heavier chain lock along with my cable lock for the front wheel.
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