DISRAELI GEARS

Siroco (1st style)

Siroco (1st style) derailleur main image

  • Derailleur brands: Siroco
  • Country: France
  • Date of introduction: 1940?
  • Date of this example: unknown
  • Model no.: unknown
  • Weight: 258g excluding rod and spring, 325g including lever rod, handle and bracket but excluding spring
  • Maximum cog: unknown
  • Total capacity: unknown
  • Pulley centre to centre: 78mm
  • Index compatibility: friction
  • Chain width: 1/8”
  • Logic: unsprung - so no logic!
  • B pivot: none
  • P pivot: sprung
  • Materials: largely steel with a bronze main knuckle and an aluminium lever rod
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Browse associated documents.


French Patent # 873,992 - Siroco

French Patent # 873,992 - Siroco

French Patent 873,992 - Siroco thumbnail