The Bike Lock Test
Here we have an assortment of bike locks from various manufacturers. U-locks or chain locks, key or combination, these are some of the best ones money can buy.
Browse the list and see which one looks best for you.
Kryptonite NY Chain Lock
The biggest, burliest lock I've ever seen. It also happens to be my personal lock. I've been using it in Massachusetts, and there have been no signs of anyone trying to break it. Most likely, if someone sees this lock, they just pass it by. (It sure is heavy, though.)
The coolest thing is that it comes with a lighted key if you're ever left in the dark!
Kryptonite NY 3000 Lock
Bicycling Magazine Editor's Choice Award May, 2002
You can't argue with Bicycling Magazine. The New York locks are expensive but worth it if you live in a high crime area. If you want to keep your bike, Kryptonite's NY locks won't let you down.
Topeak OnGuard Beast Lock
It looks pretty beefy, kind of like a Kryptonite NY lock. It costs about the same, too. To tell you the truth, I would stick with a Kryptonite NY lock. (I haven't used this lock or heard from anyone else who did, so I won't discuss much about it.)
Kryptonite Kryptkeeper Lock
Flexible, self-coiling steel cable, long enough to lock both wheels. It's a basic cable lock, a good choice in low crime areas.
OnGuard Combo Titan Lock Cable
This heavy-duty, self-coiling cable comes with the ultra tough M-Cylinder locking mechanism with a thick hardened steel anti-drill plate for added protection. Vinyl coated with easy to use mounting bracket that fits most bikes. Includes five keys.