Kryptonite New York Fahgettaboudit Mini

Bottom line

The Kryptonite New York Fahgettaboudit Mini is frequently seen on the streets of high-theft areas, and for good reason. This bike lock is one of the top performers when it comes to security.

Ease of use

Well worth the weight. Most reviewers agree: If you want the most secure bike lock, you're going to have to deal with extra heft. Although the Kryptonite New York Fahgettaboudit Mini weighs nearly 5 pounds, experts say it's a good choice if you live in a high-crime area.

The lock doesn't come with a mounting bracket, which owners say makes transporting it more difficult, but they like its compact size. It measures 3.25 by 6 inches on the inside so thieves have less room to gain leverage, but it might be small for bikes with a thicker frame and wheels. To avoid carrying a second lock for securing your wheels, consider the longer Kryptonite New York Standard U-Lock (Est. $60), which many users prefer over the Fahgettaboudit for its size.

Materials

A tough exterior. While the shape and design of a bike lock may determine the level of security it offers, materials also play a big role. Reviewers like the Fahgettaboudit's thick, 18 mm hardened steel shackle, which is slightly thicker than several comparable models and helps the lock resist attacks from bolt cutters and hacksaws. Testers note, however, that this lock and many others give way easily to an angle cutter.

A vinyl coating deters attacks plus guards your bike frame against nicking and scratching. The center keyway adds a level of protection, as well; experts say these are tougher to attack than side-mounted keyways. A sliding dust cover protects the cylinder life and ensures durability.

Warranty & security

A top performer in security tests. Experts agree that all bike locks can be broken, so the test of a good lock is whether it's time-consuming and difficult to hack. Reviewers say the Kryptonite New York Fahgettaboudit Mini is one of the best at repelling theft, holding up longer than all other U-locks in tests with hand and power tools. It also comes with a $4,500 anti-theft warranty -- one of the highest available -- and three flat keys, one of which is lighted.

To take advantage of the anti-theft protection program, consumers will need to submit several pieces of time-consuming paperwork after purchasing the lock. They must also send in fragments of the broken lock to claim the warranty, which can be a problem if the thief leaves no remnants.