For the name alone, Kryptonite’s Fahgettaboudit — don’t pronounce it like Michael Scott does — deserves to be on this list, but it helps that it’s also one of the strongest bike locks available. This small but mighty U-Lock is made of 100 percent hardened steel that has been triple heat treated, and boasts an impressive 18-inch shackle that makes it impenetrable to bolt cutters. It is vulnerable to angle grinders, however, but since the double bolted crossbar locks both sides of the shackle, a thief would need at least 10 minutes to break through it.

With all that strength does come a lot of weight — 4.5 pounds to be exact. Its locking radius is only 3.25 by 6 inches, which could make locking anything with thick wheels difficult. 

If you park your bike downtown or in a place with high theft, you’ll want the most secure bike lock you can get, which is the Fahgettaboudit Mini. The lock also comes with a free insurance plan, so if someone breaks your Fahgettaboudit lock and steals your bike, Kryptonite will cover up to 4,500 worth of damages.

TiGr makes portability as much of a priority as security with its successful project, the Mini.

At a little less than a pound, the Mini is made of titanium — a trend in bike locks, lately — and uses a push-button locking mechanism, but what makes this lock particularly special is its size. Its 4- by 7-inch locking area makes for a lock that secures a majority of road bikes, while also remaining light enough to carry it around with you. This may sound like a minor feature, but if you’ve spent thousands of dollars on a light road bike, you’re not looking to add unwanted weight.

The company harps on the convenience of its mounting clip that comes with the lock, but be forewarned: Depending on your bike’s frame, the clip might be completely useless to you.

LiteLok ditched the construct of a steel frame and used its patented “Boaflexicore” material to make it the lightest and most flexible bike lock. An impressive feat, it also earned the lock a coveted Gold certification from the independent bike security firm, Sold Secure.

The lock weighs in at just 2.4 pounds, and its flexibility lets you lock onto poles or signs which might be difficult to secure with a U-lock. It’s an ideal option for anyone wanting something quick to lock and easy to carry, but it hasn’t worked out for everyone.

It’s important to note that there’s a video online that shows someone breaking a LiteLok and stealing a bike in a matter of seconds. It’s also worth pointing out that there are a lot of personal testimonies saying the lock is just as secure as LiteLok claims, which means the lock in the video could’ve just been defective — however, we won’t speculate.

Either way, if this lock is everything you want but you’re concerned about the video, don’t hesitate to do extra research or reach out to LiteLok support.

Along with being a Sold Secure Gold-certified lock (breaking through its 10-millimeter steel practically impossible), the Hiplok Original is also a fashion statement. While you’re biking, you can wear the Hiplok around your waist and have it double as reflective wear so you’re more visible to cars and other riders.

The Hiplok Gold is the most secure wearable chain the company offers but it’s also 5 pounds. If you want a cheaper and lighter (but slightly less secure) wearable chain from Hiplok, you can browse its other options.

The 5-millimeter, specialized hardened steel bars which comprise the ABUS Bordo 6000 are Fort Knox-like but they aren’t what make this lock virtually impenetrable. It’s the 100-decibel alarm that sounds for 15 unrelenting seconds that creates this lock’s genuine theft-averse magic.

Made with the same 3D movement detection sensors used in the ABUS motorcycle security division, this recently launched lock is about as loud as a pneumatic drill. The sensors are intelligent, capable of deciphering short, quick movements (such as a ball hitting the bike) from long, sustained interference (a thief cutting a lock), emitting only a short warning tone for the former.

Aside from its impressive alarm system, the mechanics of the lock are also solid as ABUS incorporated a folding design and its Plus cylinder to protect against picking. The bars feature extra soft 2-components coating to spare the bike’s paint job and special linking rivets.