Very good82/100
In Stiftung Warentest's bicycle lock test, 81 models compete. Almost a third failed. Fortunately, there are also good locks for little money.
The U4 with security level 4 is particularly comfortable to use thanks to its automatic locking mechanism and reversible key. A dust cover protects the IN-X inner cylinder. Visually, the U4 Plus is also impressive, as it features the new and elegant product design that is characteristic of all Trelock product innovations.
Dimensions of the U-lock: