The lock body of the top model U6 from TRELOCK is identical in construction BS 650 and thus one of the most secure locks in the TRELOCK range. A dust cap protects the IN-X® inline cylinder. 

The secure shackle made of hardened steel and the various mounting options on the bicycle frame with the bracket ZB 401 make the U6 a valuable security companion. The U6 is also visually convincing because, like all new TRELOCK products, it comes in a new and elegant product design.