The priorities of war production have reduced the Cyclo derailleur range to:

• The Cyclo Two Speed.
• The Cyclo Three Speed.
• The Cyclo Ace.
• The Cyclo Witmy.
• The Cyclo Oppy

• Publisher: Cyclo Gear Company
• Country: UK
• Date: August 1941
• Derailleur brands: Cyclo Gear Company
• Derailleurs: Cyclo Standard, Cyclo Oppy, Cyclo Ace, Cyclo Witmy