Shimano Skylark (SL10)

Shimano Skylark derailleur (SL10) main image

With the closing of the 1970s the already venerable Skylark design took a small, but significant steps forward. The cable clamp was mounted on the outer parallelogram plate - changing the geometry of the gear, as previously the cable clamp was attached to the front knuckle.

This change persists to this day, and somehow, a decade later, enabled what is basically a 1960s design to index accurately and reliably. Spooky.

  • Derailleur brands: Shimano
  • Categories: Shimano - from Skylark to world domination
  • Country: Japan
  • Date of introduction: 1977?
  • Date of this example: 1980 (two letter code EG)
  • Model no.: SL10
  • Weight: 289g including hanger plate
  • Maximum cog: 28 teeth
  • Total capacity: 28 teeth
  • Pulley centre to centre: 54mm
  • Index compatibility: friction
  • Chain width: 3/32”
  • Logic: top normal
  • B pivot: sprung
  • P pivot: sprung
  • Materials: steel
Shimano Skylark derailleur (SL10) additional image 01