Due to various reviews I decided for the MASTER LOCK Padlock with a high bow, 8195EURDPROLW with long strap. The holder seems stable enough for a touring bike. When rough road but the lock rattles significantly in the holder. Since the primitive tensioner does not help. Remedy I have created with an additional Velcro. Now nothing rattles (see pictures). Negative is the dull somewhat rough rubber of the temple. If you touch the bicycle frame so that, for example, then it leaves its traces of color. That's right at my ugly white frame! Although the castle is covered with a slide, but I ware to doubt that in the closed condition water will not penetrate. The keys are very primitive and some hakelig. Here I rely on the test results in terms of safety.