This was the fourth in a series of four articles by E. Buony. It adds detail (and some attractive diagrams) to his earlier discussion of a double-fixed hub.

(Source gallica.bnf.fr/ Bibliothèque nationale de France)

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• Publisher: T.C.F. Revue Mensuelle
• Country: France
• Date: July 1898
• Derailleur brands: none
• Derailleurs: none