The K-Traz U13 is a U-lock with a loop made from very high resistance steel. Fitting to the bike is quick and easy using the mount frame (included) that can be used on any tube from 20 to 80 mm in diameter. Provided with 3 keys and the possibility to duplicate keys in case of loss.
Features

Z Safe: Power ful double locking system. High resistance against impacts and twists
High resistance: Tensile and torsion strength. antitheft and antidrilling 
Long handle: Easy to attach 
Loss of key service: Duplication of keys in case of loss. Unique serial number

Specifications

Material: Hardened steel
Mounting: Adjustable on downtube from 20 to 42mm
Dimensions: 115 x 292mm / 4.5 x 11.5"
Diameter: 13mm / 0.5"
Keys: 3 included