Lucien Juy seems to have spent a lot of time and effort worrying about the problem of removing the rear wheel of derailleur bicycles. This is one of his many solutions.

• Publisher: L’Institut national de la propriété industrielle
• Inventor: Lucien Juy
• Country: France
• Date: French application June 1935
• Derailleur brands: Simplex
• Derailleurs: nothing specific