At the Paris Exhibition,Campagnolopresented a derailleur for racing bikes that was so innovative that it became the forerunner of the modern derailleur. The Gran Sport was the first rear derailleur to exploit the principle of the parallelogram derailleur for racing bikes, which is still used for modern rear derailleurs.
The Ambrosio brand was founded in Turin in the early 20th century. In those years, people didn't wonder who produced the rims and handlebars used in the first competitions: they all knew they were Ambrosio.