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.


  1. Brand: SunTour

  2. My category: SunTour - the Honor story

  3. Country: Japan

  4. Date of introduction: 1982?

  5. Date of this example: 1982 (two letter date code is YB)

  6. Model no: unknown

  7. Weight: 349g including hanger plate but excluding drop-out bolt

  8. Maximum cog: 30 teeth (Sutherlands 4th edition and SunTour)

  9. Total capacity: 28 teeth (Sutherlands 4th edition and SunTour)

  10. Pulley centre to centre: 57mm

  11. Index compatibility: friction

  12. Chain width: 3/32”

  13. Logic: top normal

  14. Pivots: two pivots, front sprung and rear unsprung

  15. Material: steel


SunTour U (2nd style)