With the third iteration of the V series SunTour defined the look and performance of derailleurs for the next 30 years. All the elements are here: the curvaceous cast aluminium knuckles, the slant parallelogram, the adjustment screws (clearly marked ‘H’ and ‘L’) at the back, the adjustable cable outer stop, the cable clamped under a washer by a bolt, and the final element - big, glossy, chromed allen bolts.

The V was a tolerable weight, astoundingly affordable and frighteningly effective over a close ratio freewheel - all it lacked was an Italian pedigree.


  1. Brand: SunTour

  2. My category: SunTour - the V story

  3. Country: Japan

  4. Date of introduction: 1970?

  5. Date of this example: unknown (no two letter date code, but both pulleys and parallelogram plate are stamped ‘Maeda Industries Ltd.’)

  6. Model no: 2900 (and also 2900/1)

  7. Weight: 270g

  8. Maximum cog: 24 teeth (source: SunTour)

  9. Total capacity: 24 teeth (source: SunTour)

  10. Pulley centre to centre: 46mm

  11. Index compatibility: friction

  12. Chain width: 3/32”

  13. Logic: top normal

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

  15. Material: largely aluminium with steel parallelogram plates


SunTour V (2900)