Kryptonite Mini Chain Lock
Many people find chain locks convenient to use but cumbersome to carry. The ability to lock to a variety of shapes of non-moveable objects is handy, and the Kryptonite series of mini chain locks with integrated lock heads is meant to ease the burden of carrying a chain and heavy padlock. The pictured Evolution Series 4 1055 Mini Integrated Chain is more in-line with u-lock weights at just over 4 lbs total and boasts the same security rating as the Evolution u-lock series but with easier use. 10 mm, 6 sided links keep your bike yours, and an integrated lock the grabs the last link means no more bulky padlock on the end of the chain. The $67 lock is 55 cm long, with longer versions available for a proportionate price and weight penalty.