Most helpful customer reviews
249 of 255 people found the following review helpful.
Realistic Security Assessment Required
By J. F.
Most people do not even think of how easily most locks can be broken or picked. To an honest person, a lock is a lock, and a social construct which we all normally respect.
However, thieves do think that way, and are aware of how to do it. Youtube videos showing locks being picked or broken are for us, to show us what to expect, although innocent people may mistake them for "secrets" of lock breaking.
The Kryptonite Keeper Integrated Chain bike lock is rated Sold Secure Bronze, and Kryptonite rates it for "Moderate Security", suitable for Quick Stop Lock-up in a non-major metropolitan area, or for a couple of hours in the suburbs, or in a rural area. Despite this lock being far superior to the average lock sold in retail stores, that just means that the most basic methods won't work on it.
Thieves, aside from those who only ride away on unlocked bikes, can be expected to carry basic hand tools, small bolt cutters, wire cutters, a hammer, and a small hacksaw. Cable locks, most bike chains, and most locks are therefore useless against a real bike thief. But they are sold because they are cheap and because innocent people buy them, thinking they are securing their bikes.
EDIT: 2013-10-01 I have tested this lock with a variety of bolt cutters and it is impossible to cut it with bolt cutters which are easily concealed. It takes quite a bit of effort to cut the chain with 36" bolt cutters with the handle on the ground.
For some, this chain will be more than enough. The lock mechanism is very solid and reliable as far as I can tell. The sleeve covers all but the end of the last link, and will prevent the chain from marring anything. The two keys are coded and one can register them with Kryptonite to get free replacements or to buy replacements after the first free set.
There is even anti-theft protection for $500, which has requirements most people will think to be above what they are willing to do, but it does show how much faith Kryptonite has in this lock.
I am very happy with this lock, and I think it is above what I need in my area, but my bike is safe and a little extra. I think this chain is the minimum a person should get to secure a bike frame, given that its cost is not much more than the useless locks, but it provides a far superior level of security.
For more security, higher security Kryptonite products should be researched.
61 of 62 people found the following review helpful.
Beefy chain and solid lock
By Paul C.
This thing is built strong. The chain is covered in a thick cloth and is of very heavy construction. The lock is massive. There are two included keys and Kryptonite will replace the first lost set for free. The chain is long enough to wrap around the frame, rear wheel, and a bike rack pipe but not much more. Kryptonite has a good web site and will explain how to best lock your bikes up. Depending on the value of your bike and where you're locking it they'll give you product recommendations for one or more locks to use. In some places with a valuable bike they'll recommend two locks - a chain lock and a 'U' type lock.
10 of 10 people found the following review helpful. See all 425 customer reviews...
2+ Years of Satisfaction
By Stillings J.
Length of ownership: over two years
# times used: several hundred
I rode my bike daily to the TX Med Center in Houston and would lock my bike outside one of the busiest public hospitals. Sometimes I left my bike in areas with very little security surveillance and several times I left it overnight. I am happy to report that my bike was never stolen or tampered with.
This is a formidable looking lock, which I'm guessing is a theft-deterrent in itself. I like the heavy-duty chain enclosed by the thick black sleeve that says "KRYPTONITE." The heavy-duty locking mechanism is tuned nicely so that there is no doubt whether it is locked or unlocked. The extra key is nice to have as a backup, I even registered mine so that I can order more in the future if I lose one.
I have used this lock over and over again and have exposed it extreme heat and humidity as well as torrential rainfall and yet it still seems to work as well as when it was brand new. I did my research before buying a bike lock and this is the type and brand that I decided upon; obviously I am happy with my decision. For maximum security I would recommend using two different types of locks, such as a chain (like this one) and a solid bar. That way, a bike thief will have to use two different tools to get to your bike. That being said, most of the time I had no worries about securing my bike with this chain only.