DISRAELI GEARS

SunTour Competition

SunTour Competition derailleur main image

The Suntour Competition can make a strong claim to be the first truly modern derailleur. It has a slant parallelogram, it has three dimensional cast knuckles, it has logically placed, clearly labelled, adjustment screws, it fits a Campagnolo end and has an adjustment screw, but most of all it is a wee jewel with the simple composed ‘less-is-more’ look that makes it identifiably the ancestor of today’s Shimano Dura-Ace or Campagnolo Record Carbon.

The 1964 SunTour Gran-Prix may have been the first slant parallelogram derailleur, but it was also packed with eccentric features that have not stood the test of time (like a SunTour Skitter it was low-normal and had only one spring that both operated the parallelogram and provided chain tension, most versions also had an adjustable length pulley cage - as on my first style of Skitter). A Gran-Prix would look mad on a modern bike, a Competition would blend in seamlessly.

One of my ‘derailleurs that changed the world’.


  • Derailleur brands: SunTour
  • Categories: SunTour - the V story
  • Country: Japan
  • Date of introduction: 1965
  • Date of this example: 1970? (the rear parallelogram plate is stamped ‘Maeda Industries Ltd’ but the pulleys are embossed ‘Maeda Iron Works’ )
  • Model no.: unknown
  • Weight: 256g
  • Maximum cog: 24 teeth?
  • Total capacity: 24 teeth?
  • Pulley centre to centre: 46mm
  • Index compatibility: friction
  • Chain width: 3/32”
  • Logic: top normal
  • B pivot: two pivots, front sprung and rear unsprung
  • Materials: steel parallelogram plates and pulley cage plates, bronze(?) knuckles (they are chromed but not magnetic)
SunTour Competition derailleur additional image 01

Browse associated documents.



New Cycling 01/1966 - SunTour ad

New Cycling 01/1966 - SunTour ad

New Cycling January 1966 - SunTour advert thumbnail


New Cycling 03/1966 - SunTour ad

New Cycling 03/1966 - SunTour ad

New Cycling March 1966 - SunTour advert thumbnail


New Cycling 09/1966 - SunTour ad

New Cycling 09/1966 - SunTour ad

New Cycling September 1966 - SunTour advert thumbnail


New Cycling 10/1966 - SunTour ad

New Cycling 10/1966 - SunTour ad

New Cycling October 1966 - SunTour advert thumbnail


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