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Especially for cycling globetrotters. Duralumin trailer can be taken apart and packed into a box of less than 93x20x17cm-which makes WILLY the smallest on the market. It can be disintegrated without tools. Rim screws have a special lever-like ending. Rear fork is made in a way so you can just simply click it in. The hub of the wheel has a build-in alternator that charges a battery allocated in one of the rungs. You can take this battery out and charge all your electronic appliances in comfort of your tent. It has several-times higher efficiency compared to solar-chargers. http://vimeo.com/34865136