Kryptonite kryptoflex 1218 coiled key cablethis coiled cable lock is perfect for transporting on the bike when that u lock is just too heavy it is flexible and small enough to fit in a bag or to the frame this would be used in areas of low risk or where you will only be letting your eyes off your bike for a short period of time as a leader in action sports security and the creator of the original bicycle u lock in the bicycle security category in 1971 kryptonite offers premium quality securi