KryptoniteEvolution Series 4 Standard Heavy Duty Bicycle U Lock Bike Lock (4-Inch x 9-Inch)

Impressive looking lock that does not weigh as much as other locks, but still provides excellent security for my bicycle. I use this to lock up my Bianchi Volpe and can sometimes also lock up another bike next to mine. I am not a fan of the small metal fitting that is supposed to be used with a plastic fitting to hold the lock on your bike, so I taped the metal to keep it from scratching my paint finish. I use this lock with multiple bikes, so I don't want to buy plastic fittings for each bike so taping it makes sense. The keyway is in the center of the orange part and the key goes deep into the crossmember. The keyway has a handy plastic cover to keep the keyway clean and it works well and does not get in the way. And one of the keys has a built in flashlight with just enough juice to help you unlock the lock. I feel very confident when I use this lock. Note that it has the flat key, not the old round one that could be picked easily. This lock will not survive an angle-grinder, but then again, nothing will survive such an attack. I use this lock as my primary way to prevent theft and I add an Abus frame lock with a hardened steel chain, figuring that few crooks have experience with a frame lock in the US, so if an angle grinder is used, it will cut through the Kryptonite and the Abus chain, but the frame lock would take multiple cuts, plus a lot of fussing, to defeat the frame lock which is around the rear wheel. Plus, all of this looks impressive and hopefully a thief will bypass my bike as being too much work. Note that many people use a cable lock to tie up the front wheel to the U-lock, but I prefer a hardened steel chain as a pair of pliers will not cut through the U-lock nor the chain.

The new centered key mechanism and double-bolt design is really excellent and big improvement over the previous designs that Kryptonite used to use. The key is more complicated, the keyhole is small and has a built-in cover. The key turns very smoothly on mine. The double bolt is a great feature because the key controls bolts on *both* sides of the lock requiring a thief to cut both sides of the lock before releasing the bike. This is a substantial lock.That also means that it is *heavy*, so it may not work great if you are looking for a lock to carry around everywhere. I use this to lock up my commuter bike outside overnight, and the lock gets left on the post 24 hours a day. So far has worked out. Crossing my fingers.The common wisdom is that it is better to use as small a lock as possible to reduce the possibility of using a crowbar to get leverage on the lock. But sometimes you need a big lock, and that's when I use this guy. It works well on my hybrid to thread it through both seat stays, the wheel rim, and a sizable post. This leaves very little space and there is *always* a less securely locked bike close at hand. All locks can be broken, so the game is to lock it up enough so that most thieves would rather spend their time on other bikes (or, hopefully, doing something productive for society).It's true that the mounting bracket is a bit of nonsense. It doesn't work anywhere on my bike, so when I do carry this lock around, it has to go in a bag.

I purchased this Kryptonite lock after someone tried to steal my mountain bike in an RV park. I got lucky, but wanted more than luck on my side. I don't ride around with this Kryptonite lock on my aluminum mountain bike. It's fairly heavy. I use the lock and the cable that comes with it to keep my mountain bike safe when I am not riding it. Both are excellent quality.I carry a cable lock when I ride, just in case I need to lock it up to go in to a store.. I would have given it 5 stars if the shinny metal bracket affixed to the u-bolt had been removable. I don't use their mounting bracket so it is useless to me and I have small gaps in my full suspension mountain bike frame. The smooth end goes through fine but it would be nicer if that bracket was removable.

I used the locks to lock my bike up everyday the keys are great and flashlight feature is great it’s worth spending your money it’s not cheap looks exactly like the picture. And it protects and secures my bike at all times.

This thing is huge and heavy, and a bike thief will need some tools and time to get through this thing. The lock works smoothly (which is not the case for all u-locks) and even has a cover that slides on and off the keyhole, which is nice. Comes with a couple keys, one of which has a little flashlight on it - that's cool. The only bummer is that it's a bit heavy and bulky, but that's inherent to the design, so I won't hold that against it. If you're looking for a nice, secure u-lock, I highly recommend, but have in mind where you're going to carry/store this thing while you're riding.

Very nice lock and it looks as though it would be VERY DIFFICULT if not IMMPOSSIBLE to get around WITHOUT making a REALLY BIG JOB out of it...my ONLY gripe with it is its BIG and TOO heavy to be traveled with on a bicycle...my bike is a nice light G.H.P. 24" BMX Pro Race and I will use this lock at home on my covered porch with a tarp over the bike and a good cable lock keeping it tethered to a post, so its worth having just not travel friendly for people like me that care about the weight of their equipment. The lock feels like it weighs at LEAST 10 lbs. (and my whole bike only weighs 22 lbs. LOL)

L'antivol est de bonne qualité. Lourd, semble solide et facile d'utilisation. Il est vrai que la serrure accroche parfois un peu mais avec un entretien régulier approprié (avec un lubrifiant spécialement formulé pour les serrures), aucun problème à déplorer, malgré une utilisation en plein hiver.Nos deux vélos sont équipés chacun d'un antivol de cadre et de ce modèle d'antivol U Kryptonite. Ils sont ainsi sécurisés par l'antivol de cadre bloquant la roue arrière et cet antivol U qui assure le cadre et la roue avant à un point fixe de qualité. Jamais eu de problème en plus d'un an d'utilisation quasi-quotidienne. Alors, est-ce nos vélos qui n'attirent pas suffisamment les convoitises, ou l'antivol qui freine les voleurs ? Toujours étant que nos deux vélos sont toujours en notre possession. Je recommande vivement ce produit.

Habe das Schloss nun seit ca. 1,5 Monaten täglich in Betrieb und bin mit meiner Wahl zufrieden.Es vermittelt definitiv ein Gefühl von Sicherheit, der Bügel und Querbalken wirken sehr massiv. Das Schloss wird mit 3 Schlüsseln geliefert, 2 schmäleren und einem größeren mit eingebautem Licht (wer braucht sowas?). Das Metall am Schlüssel wirkt auch recht zuverlässig, kann mir nicht vorstellen dass der so leicht abreißt.Die Rahmen-Halterung finde ich persönlich auch OK, leicht zu montieren und mit sicherem Sitz. Die anderen Meldungen zum klappern des Schlosses in der Halterung kann ich bestätigen, allerdings empfinde ich das Geräusch als überhaupt nicht laut oder störend beim fahren.Größter Nachteil; das Schloss ist wirklich schwer!Bin dennoch sehr zufrieden und würde es auf jeden Fall weiterempfehlen.Nachtrag Oktober 2020; das Schloss leistet mir immer noch gute Dienste. Manchmal friert es im Winter ein, wenn man vergisst die kleine Abdeckkappe vom Schlüsselloch zuzuschieben, ansonsten gibt's weiterhin wenig zu bemängeln.

Got two sets of them Mini-7 and Series 4. Both are brilliant nothing else to say, locking device is working very well. Somebody already tried to cut the lock!! It only has bin week. But guess what, they litterally only scratch the surface of it, probably after trying for a bit they realised that it's not the lock to cut!!Couple of thing to point out1. Small bracket which you can attach to your bike and then just hang the lock on is very cool, plastic but lightweight and sturdy enough.. at least you dont have to hang the lock in the odd places while cycling!2. There was a 3 key set and one of them came in with the light on the key, this is small but very cool feature, actually does help to open up the lock in the dark.!It's quite heavy thou, but this is the only way to protect your bike in town.... You can easily remove it and store it when cycling out!

Mi è arrivato lucchetto, 3 chiavi di cui 1 con luce led, fascia per attacco alla bici, manuale di istruzioni e promozione per gli inglesi :(.In ogni caso mi pare solido, si attacca bene alla bicicletta e come l'ho messo io non da fastidio.Pesa un po' quindi non è per velocisti :)Molto comoda la chiusura della serratura.Si attacca anche a pali medi (passa al pelo).Sono molto contento ovviamente saprò se resiste in caso di tentativo di furto O.oAllego foto per far capire le dimensione su una bicicletta normale.

The media could not be loaded. Llevo apenas dos semanas usando el candado, decidí comprar este modelo debido a dos razones: por nivel de seguridad que proporciona la marca 8-10, y por el intento de robo de mi Bicicleta en Reforma 222 (CDMX), a partir de ahí me puse a ahorrar para adquirirlo, hasta ahorita todo ha ido de maravilla, obvio te limita demasiado dónde encadenarla pero es más seguro, yo he tenido que dejarla a dos o tres esquinas de donde estoy pero me voy con la confianza que les quitará mucho mucho tiempo, y si es que pueden, romperla. También la aseguro desde el freno de disco y el cuadro con un candado con alarma, que al más sencillo movimiento suena, prefiero verme exagerado al encadenarla pero pues es una inversión que hice y no pretendo perderla. En cuanto al envío, pues dos tres, llegó empolvado y dañado de algunos plásticos, nada que dañe su funcionalidad.