Based in Münster, Trelock GmbH develops and manufactures bike locks – such as U-locks, folding locks, armoured cable locks, curly cable locks, frame locks, cable locks, and combination locks – as well as cycle computers, heart rate monitors, and lights for the bike and outdoor markets. These lifestyle, hobby, and sport products are distributed internationally. "Inspired German Innovation" is the motto of the brand, which was founded in 1854.