4 stars and fully expect to upgrade it to 5 within 3 months. People said it was huge. Huge is not a big enough word to describe this product. You need more letters. 3 keys, one has a light and its a bright blues color, thats a nice thoughtful gesture. I dont know if its just to stand out from the crowd or if they did it on purpose, because blue and green light is a far superior light to see by at night time compared to red. Its also more visible to others, not that you would really use this as a signal but you could if it was all you had. Red gets used so much because it doesnt effect your night vision as much, and its not as persistent as other colors. So its stealthier, but thats not the point with this light, so it was done right. The chain is freaking scary. Im glad this was for a motorized bicycle, this would be too much on an unpowered bike. I dont think you will even have to lock it to anything. Just lock it around the back wheel and toss it onto the ground, you bike will be there in an hour, tomorrow, next week, two years from now, and 10000 years from now, long after your bike has rotted away, the chain will still be there. Actually though, dont toss the chain anywhere, lay it down gently, if you toss it, it might damage the surface it lands on, concrete, steel, rock, whatever, just be gentle. All kidding aside, im sure this chain can be defeated, but its gonna take a dedicated and properly equipped thief to do it if you do your part and lock it right. Love the independent security rating, i wish we had an american version of that. The cover for the chain has velcro straps on the ends to keep its pants pulled up which is nice, the last kryptonite chain i bought had rivets going throug the nylon cover. They ripped and the cover wpuldnt stay in place. If these fail i will use grommets to hold it in place through a link. One complaint about the chain, it doesnt interlink, in the future, i may want to use this chain with a different lock and my choices are limited by having to have both end links through a shackle rather than one. They dont have to make all the links bigger, just the end links. This chain would not work with the abus granit insurance lock or many other high security guarded shackle locks. So a n interlink or noose feature would be good. Also at the price, a carry bag would be nice. Peerless makes a set with a comparable chain, a lock and a carry bag for this price point. So, onto the lock. It feels right, its smooth in its mechanism as long as you push the key in all the way, if you practice, you wilk get it, i was used to kryptonite disc detainer locks so this was no different for me. If you dont get the key all the way in, it will feel chrunchy or gritty, this means you are doing it wrong, back out and start again. Ive heard so many people review kryptonite disc detainer products saying that the lock jammed up on them and i think the majority of them are just not pushing the key all the way in.it feels very solid, and the sliding cpver for the keyway is a great touch. The locking mech looks like ball bearing from the shackle cutouts, but its not. Still looks solid, but it might be shimmable of one had enough time and inclination. I might try this and see what happens. Im not a huge fan of u locks as primary locks, but this one seems like its pretty competent. Its heavy too and the shackle runs de, helping to defeat prying attacls, everything succubs to a grinder, but i think it will take a grinder or a portable electrohydraulic cutter to brute force this open quickly. Picking remains an option as it does for most any lock, but it not a very likely scenario. Disc locks take a pretty specialized pick set to do quickly and they take practice. Dont get scared about a video you watcjed in which someone used a specialized or even custom made tool that allowed them to pick the lock. They might have spemt 3 weeks or 3 months before they got it. Then they dpubled down amd figutred THAT locks algorithm so to speak. Just because they picked a similar lock doesnt mean they could cold pick your lock or that there are armies of lock picking bike thieves out there. Definitely not something you wamt to ride with all the time, as it is heavy, unless you just want to build leg muscles. Get a basket and a tool bag to carry it in. Also im pairing this with another kryptonite chain (smaller thankfully) and a bully alarmed u lock, which i something i recommend for securing bikes of moderate to high value. I will have 1000 just in the bike and motor just about 20% of the value again in locks isnt bad. Dont use this chain to secure a standard bicycle wheel, its heavy enough to damage spokes, only through the main triangle or the stays if you have nonother choice, but be careful as its heave enough to damage delicate things. 16lbs shipping and i bet the chain is 15 of those. Also, got the chain in two days. Super fast shipping even without prime. Also, i tested to see if its shimmable and its not. I did this by taking the shackle out, then locking the lock and trying to push the shackle in and the shackle will not push past the locking pawls. So if the shackle will not push past them the me bearing down on it no one is getting a thin aluminum, or even steel shim between the pawls and the shackle and then getting the shackle out pf the lock body. Plus the gap on the pawl side of the shackle hole is really tiny, even if you started from a side and worked it around, i doubt you could get anything in there. Its a prettt secure lock. Sold secure gold. Yes, i love this lock and chain. The lock still functions smoothly if you do your part and PUT the key in all the way. Look up a couple of videos about this. One is by wayne winton he is a locksmith and he has to break stuff for a living sometimes and he does product reviews on his ypu tube channel. He bolt cutter tested this chain and he couldnt get through it with 42" bolt cutters. Theres another video showing a mobile locksmith just wailing on this chain with all sorts of stuff and just getting nowhere. So pros, Just about totally secure with the right lock and habits. Weather proof for the most part. The cover works both the one on the chain and the one on the lock. The lock is unshimmable at least by me and my efforts, the dead bolts seem to be secure. I have not hammer tested it yet, if i do i will post results. Just looking at it will probably deter most people who do not have a grinder as the chain is so thick smaller croppers probably cant even fit on it. Lock is smooth and very heavy duty, may not be unpickable, but its virtually so. Good luck cropping this shackle. I dont see cons to this as in it fails to do what it is supposed to do or it does something it shouldn't and doest have to, so im going to replace cons with "things you should know" Think of the biggest longest most unusual word for heavy, this chain is that. Its probably too much for most commuters, unless you just want the weight. Its reall no safe to wrap around your bike frame amd ride with, if it shifts during a turn, its enough to cause a crash. If it falls into the wheel somehow, you are hosed, its gonna destroy a wheel. You need a basket or pannier or bag. It will fit in the rothco small mechanics tool bag with room to spare for tools and a flat kit easily. Thats how i carry mine. That will strap to a rear basket easily and can be carried with you when you lock your bike up. Its not something you want to be careless with. If you put it around your neck, be careful not to hit yourself in the head with it. If you drop this on your foot, expect some severe bruising and maybe an xray. If you swing this around and you hit yourself with it, its gonna f*^k you up. If you swing this in anger or defense, and it hits your target, you should be ready to explain to authorities why you felt you needed that level of force to protect yourself, because theres a good chance that the person you hit will need an ambulace. It can be awkward to use because of its weight it will not rest in a spot easily, it tends to pulls itself back down to the lowest level it can, so it sometimes takes a couple tries to get the lock on. Sometimes it might be easier to leave this at a regularly used location that is a high theft risk and just use it when you are there, but doing so might allow someone to cut a link that is covered by the sheath and install a quick link to let them steal your bike or asset. You could carry a smaller chain and lock for quick lock ups where you will be in sight. If you have more than one high risk area you spend lots of time in get more than one, remove the covers, spray them with silicone protectant and leave one in each place. You can carry the covers with you and put them on when you need to use it, or get some pipe insulation to use as a pad on your bike.Cant get a more secure chain and lock that isnt bigger and bulkier and rated as well for the price.Update 12/23/16As for weather resistance , its been excellent so far. It has been kept outside almost everyday since receiving. Either in use or stored in a small canvas tool bag i hold all my locks in, its the rothco small tool bag and it holds: this chain and lock, the bully alarm lock, a smaller integrated kryptonite chain lock, a cable from anpther another lock i had for a while. So while it is heavy and long it compacts very well. When the bag is fully loaded, it traps birds and small pets in its gravity well. As i was saying though, the chain and lock have both been outside since i recieved it in june. I didn't notice any degredation of the sleeve or rust on the links, and the lock still works smooth every time, no hang ups. But that wasnt good enough for me. I wanted to make sure for the review and the cost that i really simulated heavy neglect. So we had a wimter storm coming up and i locked the chain around a stair rail outside and left it for a month. I left the keyway cover open but the keyway was pointed down. When the storm, came we had negative temps, freezing rain amd extreme windchill. After the thaw, i checked the chain amd sleeve for damage, none. The lock was still as smooth as butter but there was some light rusting in the holes where the shackle goes, thats to be expected moisture can get trapped there and that will do it. It wiped right away. Maybe just a few drops of oil or wd40 will protect it. So i don't know what other people are experiencing, but my lock and chain are rock solid and weather resistant.11-3-20 update on weather resistance and durability. Have had this a few years now and it has spent most of that time outside and in the past couple years due to various reasons, its been sitting in same place and position, unused and uprotected at all. No lube or other slipricity preserving measures were taken. Ive had the lock taken completely apart and a couple occasions over the years because im a curious sort and i do that sort of thing. Which means that if one only kinda knows what what one is doing, this thing handles disassembly and reassembly fairly well. I told you that to tell you this, the keyway cover isnt all that skookum and hasnt survived the various things ive done to this lock and is no longer of this world, the lock has suffered none the worse for this and during the aformentioned period of time outside, the lock was positioned such the the keyway was straight upward facing to the sky meaning that all of the stuff falling out of the sky in the general vicinity of the keyway would as nature would have it, fall straight into it. For a couple years. Im sure the lock mech isnt pristine as the day i bought it, but i went outside today for the purpose of removing the chain and lock from the asset it was attached to so that i could rid myself of that particular asset, but keep the chain and lock for future use.The key is still on my keychain and i want to tell you that even after sitting straight upward and wide open through sun and rain and snow and squirrel turds falling in it, the key went in with nary a complaint and turned smooth as butter on a bald monkey and the shackle fell smoothly as well right the frig out of the lock. No preparatory slipricity addatives or precussive persuasion needed. There were signs of surface rusting on the lock and the chain as well but not what one would expect for have been in the wild that long.So again, im not sure what other people are experiencing, or why they ecperience it, but for me this product has far exceeded my expectations of durability. Im expecting many more years of service from this.
