SunTour SX-100

SunTour SX-100 derailleur main image

The SunTour SX-100 is the SunTour S-1 redesigned so that it fits to a drop-out and does not need any special fittings on the chainstay. The SX-100 also has the indexing in the lever (usually a twist grip), not in the derailleur. The pulley cage is very short, as this gear is aimed at commuter and utility bikes with a single chainwheel.

It retains the somewhat elegant the horizontal parallelogram, but the mounting has become gross. This example has a Japanese-style ‘hanger’ with a rear facing slot.

  • Derailleur brands: SunTour, manufactured by SR SUNTOUR
  • Categories: SunTour - indexing insanity
  • Themes: Small wheels on my wagon
  • Country: Japan
  • Date of introduction: 1993
  • Date of this example: 1994 (two letter date code is KA)
  • Model no.: SX-100
  • Weight: 362g including hanger plate
  • Maximum cog: 28 teeth?
  • Total capacity: 26 teeth?
  • Pulley centre to centre: 43mm
  • Index compatibility: 5 speed?
  • Chain width: 3/32”
  • Logic: top normal
  • B pivot: none
  • P pivot: sprung
  • Materials: largely steel, with a plastic rear knuckle and inner pulley cage plate
SunTour SX-100 derailleur additional image 01

Browse associated documents.

SunTour SX-100 - instructions

SunTour SX-100 - instructions

SunTour SX-100 derailleur - instructions scan 1 thumbnail