Kryptonite Keeper 785 Bike Chain Lock, 2.8 Feet Long Heavy Duty Anti-Theft Bicycle Chain Lock with Keys for Bike, Motorcycle, Scooter, Bicycle, Door, Gate, Fence

It's pretty good, does the job and there are no mechanical problems, no rusting and no seizing up so far.

Solid and chunky, good for this price point. Have been using for 3 months with no issues. However just recently I've noticed the lock becoming reluctant to open. I've applied grease to the mechanism which seems to help a little, but probably 3 in 10 times, the lock will rotate but not disengage, requiring considerable force and several attempts to get it to open. Less than ideal when fumbling around in the dark on a rainy morning.

Good and strong very easy to use

A sturdy chain lock. Just fit my child’s bike.

Very easy to use and secure! Heavy to take with you but I use to wrap it around my waste when cycling

I've been using this for a week now and it's a good lock. It is a bit heavy but helps weight down your cycle anyways.

Seems strong enough to deter petty criminals, would have liked it slightly longer

I’ve now had this lock for 15 months. Was great to start with, the lock could be a bit fiddly sometimes as stated in the reviews but still manageable. Now all of a sudden the lock has seized up. So trying to unlock or lock has become quite a challenge. Using lots of WD40 seems to help but it doesn’t last long. At least I still have my bike and lock after 15 months in London (my bike is an trusty old thing that luckily thieves aren’t after it seems 🙏) so it has worked, but I’m reluctant to purchase another one to encounter the same problem a few months down the line.

Yes, it weighs a bit, but if you have a small enough waistline (mine is 28in, the chain is 32in), then you can transport it that way, or wrap it around your seatpost (this is the way I carry mine). Honestly it doesn't weigh much more than my U-Lock though. Anyway, I live in LA and this is great for when you need to make a few stops and leave your bike for a couple hours or so. At night, I store my bike in my home, so I don't worry about having to leave it out overnight. But I have been to more sketchy areas and left my bike locked with this lock, and I can say that as long as you know what you are doing, you will be fine with this lock. I make sure to wrap it through my frame and wheel and then tie it before actually locking it. As far as locking and unlocking, honestly it's not that hard. I saw others complaining that their keys get stuck, etc etc. It says right there on the little attention label attached with the keys that you need to make sure the key is inserted to the bottom of the cylinder before turning it. Nothing too complicated about that. I was able to get in and out of the lock with no issues. If it tends to get stuck, you could also probably put a drop of lube in it and it should be fine. That's what I do to my older U-lock (that I also use in conjunction with this lock for my back tire. I feel so much more comfortable locking my bike and leaving it to shop or do whatever I'm going to do. I don't get any sense that my bike is going to be gone when I get back. I do see other people with much nicer-looking bikes who do really poor jobs at locking them up, and it saddens me, because I know that if a thief had to choose between my bike and that person's, they'd choose theirs based on how poorly it's secured. Kryptonite has really good information on their site about locking and securing your bike. Not to mention, they will even suggest what type of lock(s) you should get based on the type of area you live in, things like that. There is so much good information out there on YouTube and places like that. Obviously if a person really wants your bike, they will get it no matter what, but you can do your part to make it as difficult as possible. Put up a good fight. Speaking of fights, this chain also makes very good weapon too, if someone were trying to walk up on you in a dodgy part of town, you could definitely whack'em with this. It's that sturdy and heavy. Overall, 5 out of 5 stars. Great lock for the price, and for where I live and tend to go. Wouldn't recommend this one if you live some place like San Francisco or NY though (depending what part). At least not without a second lock of choice. But in most parts of Los Angeles (except maybe Santa Monica or North Hollywood, HUGE theft target areas) with this lock and proper locking technique, you should be fine.

Very good!

Excelente cadena para seguridad de tu bicicleta, aunque es un poco elevado los productos de esta marca, no dudes en invertirle porque mantener seguro tu vehículo, de verdad nos han intentado cortar este tipo de candados de esta marca y sólo le hacen una fisura porque pareciera que son irrompibles.

重くて強い感じが良いですね。 ロックは軽い＝弱いので重いのは仕方がありません。 でも重くても弱い物もあるなか、クリプトナイトはとても信用ができるので満足しています。 ロードバイクでもクリプトナイトのU字ロックを使っています。 鍵の開け方はクリプトナイト共通みたいですね。途中で回してしまうとクルクルと空回りするので、ズレてしまったら回しながら押し込むと嵌るという感じが同じでした。 それと鍵はロック状態にしないと抜けないのも一緒。チェーンロックとしては、外した状態で鍵が抜けると満足度がかなり上がると思います。 長さは丁度良いと言えば丁度良いし、あと10㎝くらい短い方が良いような気もするけど、まあ、これで良いかという感じです。半端ではあるけど長すぎることはないのでとりあえず満足です。 若干使い勝手は悪いところはありますが、慣れれば大丈夫程度の物なので、お勧めできるロックだと思います。

Great chain and lock very nicely made looks super secure and I'm able to wrap it through my rear wheel and the frame of my bike. And still wraps up nice around my seat tube for transport, perfect for what I need.