The KryptoFlex 1218 Combo Lock is a cable lock, and therefore is lightweight and portable. It even comes with a bracket to mount this lock on your bike frame. Its 6-foot length allows for versatile lockups on even the most awkward immovable structures. Its use is limited, though, by its low level of security. The factors that make this lock easy to transport also contribute to its lack of effectiveness as a theft deterrent. It succumbs to virtually any hand-powered cutting tool. As such, this model is best considered a supplement to a heavier-duty chain or U-lock, as a minimal deterrent in areas of low crime, or when securing your wheels where you'll keep an eye on them.
Our review features two combination cable locks, and we prefer the OnGuard Akita 8041 overall. It offered the same level of security for less weight and was easier to use. For a step up in security with breezy portability, check out the Top Pick Award-winning ABUS uGrip Bordo 5700.