DISRAELI GEARS

SR SUNTOUR Duro (720 SGX)

SR SUNTOUR Duro (720 SGX) derailleur main image

After SunTour went into a long slow decline, it transmuted into SR SUNTOUR and moved from Japan to Taiwan. And throughout the 1990s the derailleur range gradually decayed into a mish-mash of low-end, sub-Shimano steel and plastic.

But the arrival of the new millenium seems to have re-energised SR SUNTOUR, which suddenly produced a whole set of aspirational, innovative and freaky looking derailleurs. These featured straight cable runs, and many had a unique ability to be compatible with both Shimano and SRAM levers. They achieved this seemingly impossible feat by cunningly having two possible ways you could run the cable on the one derailleur.


This futuristic item is a SR SUNTOUR Duro (720 SGX). The '700 series' number may indicate that both knuckles are aluminium. It featured:

  • SR SUNTOUR's clever dual cable routing allowing compatibility with both Shimano and SRAM levers
  • a largely aluminium parallelogram, with only a steel inner parallelogram plate
  • a steel inner pulley cage plate
  • a solid b-pivot bolt
  • SR SUNTOUR's longest pulley cage (at 85mm) which is called SGX.


  • Derailleur brands: SR SUNTOUR
  • Country: Taiwan
  • Date of introduction: 2004? for model year 2005
  • Date of this example: unknown
  • Model no.: DURO720-SGX
  • Weight: 328g
  • Maximum cog: 34 teeth (source: SR SUNTOUR)
  • Total capacity: 45 teeth (source: SR SUNTOUR)
  • Pulley centre to centre: 85mm
  • Index compatibility: 9 speed
  • Chain width: 3/32”
  • Logic: top normal
  • B pivot: unsprung
  • P pivot: sprung
  • Materials: largely aluminium, with steel inner parallelogram plate and pulley cage plates
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