Kryptonite Keeper Standard U-Lock

Exceptional product.

This lock is a good rated lock designed for medium protection. Together with another bike lock it has better chance protecting the bike. It can hold up to 3 MTB.

I was wary of buying this because of the reviews claiming the lock was fiddly to use with the key. I went ahead anyway, and I'm glad I did because it's a really decent lock for the price. Lots of people have said that it's too small, but I've had no trouble at all fastening the lock around a rooted post and my back wheel so it's plenty secure, and it's a standard sized bike. The fact that the base of the lock actually detaches makes it easier in my opinion, though this is something others seemed to dislike. The only reason I've gone for 4 stars instead of 5 is because I *did* have an incident with the key not working very recently, which is what I assume others were talking about, but I was able to see exactly what the issue was and know how to prevent it in the future (hopefully!). Basically, the best way I can think to describe it is that the channel of the lock is made up of segments that, when you put the key in, all twist at the same time. However, when you pull the key out after locking, if you slightly twist the key at all it twists those top few channels, but not the lowest ones. As a result, it's then hard to put the key back in, because the channel is no longer straight (I hope this makes sense!) But the fix is literally just to put the key in as far as you can get it, then twist gently until the channels re-align and you can push the key in all the way. I know that sounds complicated, but it's really not, and if you just experiment with the lock when you receive it, you'll see what I mean and how easy it is to resolve. If I end up having this issue again and it's worse, I'll edit my review, but for now I would say don't let the other reviews put you off. It's a good size, sturdy, and not tricky to use once you suss it out. Also, I noted that some reviews criticised the lock because their bike got nicked, but based on the photos they had secured the bike with the provided cable and then closed the cable with the heavy-duty lock. This is NOT how you lock a bike! Never have the wire cable as your primary source of security – secure the back wheel of the bike to a rooted post and, if you want the extra security, you can loop the wire through your front wheel.

This is absoloutly great. The only problem is since I am using it outdoor, the tips started to rust after no longer than 6 monthes, and it made it slightly harder to lock and unlock.

Secure and does the job

Purchased 2 years ago still going strong

Keys stopped working after a while and couldn't unlock the d-lock. Was good until I had this problem. Really should have a cover to stop anything getting inside the locking mechanism

This is Kriptonites standard lock and great for what I need a lock for, if you leave your cycle for long pariods of time I would recommend a Kriptonite stronger lock. But I only leave my cycle to go in and out of shop and always lock it with two d locks and cable which comes with the lock. They say would take 8 to 15 minute for anyone to get through the locks with the right tools, so not made to leave the cycle all day long but great value for what I wanted it for, I have seen people look at my cycle which is a e-bike but never seen anyone trying to tackle the locks. A lot of theives circle areas everyday and get used to what bikes are being left and they focus on the ones being left for long pariods of time, so if just using for general use these locks are great and very good value for money. So yes would recommend for short stay lock up of your cycle but would look higher up the market for long lock ups.

Le seul bémols est l’attache au cadre en plastique qui a déjà lâché un coup lors d’une sortie. Mais cela a été remplacé gratuitement.

It was Nice while it lasted. After a month, the lock mechanism kept getting jammed. I returned it

Veo las muescas de que lo han intentado romper varias veces, pero no lo han conseguido. Mi bicicleta duerme en la calle y tras un año en la calle se ha oxidado, cierra peor pero sigue funcionando.

Nice Ulock. The small size coupled with a braided steel cable works well to secure 1 or two bikes.

Great bike lock that is sturdy and well made. I have read the reviews about it being hard to lock and I have no issues and use the lock daily. Great brand and great price for peace of mind while locking up e bike at work.