SunTour U (2nd style)

SunTour U derailleur (2nd style) main image

I (perhaps erroneously) regarded the SunTour U (and the very similar SunTour Hero) as being versions of the SunTour Honor manufactured down to a price, and fitted as original equipment on Japanese made bicycles.

This later SunTour U seems to me to differ from my fourth style of Honor in that it has a particularly ugly pressed steel rear knuckle and a non-standard and very crude hanger. It also has no plastic spring cover - which seems to be the defining mark of a U as opposed to an Honor.

  • Derailleur brands: SunTour
  • Categories: SunTour - the Honor story
  • Country: Japan
  • Date of introduction: 1982?
  • Date of this example: 1982 (two letter date code is YB)
  • Model no.: unknown
  • Weight: 349g including hanger plate but excluding drop-out bolt
  • Maximum cog: 30 teeth (Sutherlands 4th edition and SunTour)
  • Total capacity: 28 teeth (Sutherlands 4th edition and SunTour)
  • Pulley centre to centre: 57mm
  • Index compatibility: friction
  • Chain width: 3/32”
  • Logic: top normal
  • B pivot: unsprung
  • P pivot: sprung
  • Materials: steel