Don't you have a bell? Which cyclist hasn't heard that yet? With the Knog Oi. the dream of many pedestrians could come true. Even cyclists who, for sporting or aesthetic reasons, have so far given bicycle bells a weary yawn are enthusiastic about the Knog Oi. The Oi. does not look like any other bell. All that is visible on the handlebars is an elegant metal ring that almost seems to float. If you look closely, you will discover the sound body in the metal strip made of aluminium, copper or brass and notice that the attachment of the bell to the road bike even functions as a smart cable guide.