Very stable processes. Raeder not too loud on the stairs. Space for a water box (6x1,5L) and loads more. Functional bag with several Einzelfaechern inside and out. For example, umbrella bag. Reflectors. Here, very pretty black and white design. Wipe off.
WATCH OUT!!! Whoever has a "Hack Porsche", it should definitely be secured with a bicycle lock. In my was on 18.04.2013 in Alnatura market stolen. I had to immediately substitute have (20 kilos, 4th floor) and have laminated 90 euros at Karstadt. :-(