Unsurprisingly, given it title, this leaflet is primarily concerned with front derailleurs. However on scan 5 there is one of the few comprehensive tables detailing the capacity of Simplex rear derailleurs.

This leaflet was generously lent to me by Andy Fraser.

• Publisher: Simplex
• Country: Product from France, leaflet from UK
• Date: 1957?
• Derailleur brands: Simplex
• Derailleurs: Simplex Tour de France, Simplex Juy-51, Simplex Juy-543, Simplex 303 Tourist