Jóka (1st style)

Joka derailleur (1st style) main image

This first style of Jóka is a simple basic derailleur, distinguished by its eccentric use of traditional screw heads - for the adjustment screws, for the cable clamp bolt and for the pulley bolts.

Overall it’s nicer than a Triplex and nastier than a Huret.

  • Derailleur brands: Jóka
  • Country: Poland
  • Date of introduction: 1985?
  • Date of this example: unknown
  • Model no.: unknown
  • Weight: 202g excluding a missing metal plate that fits between the rear knuckle and the hanger
  • Maximum cog: 26 teeth?
  • Total capacity: 26 teeth?
  • Pulley centre to centre: 47mm
  • Index compatibility: friction
  • Chain width: 3/32”
  • Logic: top normal
  • B pivot: unsprung
  • P pivot: sprung
  • Materials: plastic knuckles, steel parallelogram plates and aluminium pulley cage plates
Joka derailleur (1st style) additional image 01