A helmet protects your brain when you fall. It has a thin shell on the outside and thick foam inside. It has a strap to keep it on when you fly through the air. It only covers your head, and the rest of your body is exposed. So you still have to be careful. Add a node tagged amenity=bicycle_parking in the geographical centre of the feature if it's just a small number of bike racks close together. Alternatively, larger areas of cycle parking may be represented with a closed way. 8rental.com reviews .