Jan Janssen Sonic road bike
The Jan Janssen Sonic road bike
When we hear the name Jan Janssen, most people immediately think of the cyclist who caused a furore in the Tour de France and/or the Tour of Spain in the late 1960s. After his career as a professional rider, he started developing his own racing bikes. The final result is the Jan Janssen Sonic road bike. And of course a number of other bicycles.