For advanced security get Trenux with a sleek and secure lock. With a minimalistic appearance it still ensures a quick trailer removal, but prevents your Trenux from being stolen. With two locks, one for each side, you can double the security.
Get a Trenux with attachments for your bicycle and a perfectly fitting waterproof bag.
The bag folds into the collapsed trailer and is at hand whenever you need it. 72 liters or 2 standard bottle crates will be enough room for your next shopping trip or cycling adventure