DISRAELI GEARS

Sachs Plasma

Sachs Plasma derailleur main image

With the Plasma, Sachs threw everything into their attempt to break into the US market. It was fiendishly high-tech, with a wacky cable routing, hollow aluminium hanger bolt, extensive use of composites, astoundingly light weight and plentiful stainless steel fittings - all very classy. The adjustment screws could even be turned with an allen key.

All of this has much in common with the SRAM ESP 9.0SL, and I often wondered if SRAM and Sachs worked together, even before SRAM bought Sachs’ bicycle parts business (also in 1997).

Like the ESP 9.0SL, I always had the feeling that the plastic Plasma might explode at any moment - but I have no evidence that they actually did so.

This example has its aluminium parts badly painted with white enamel. Mystifyingly, I have seen this on a number of examples - was it a fashion amongst Plasma owners to deface them in this way?


  • Derailleur brands: Sachs
  • Country: Germany, manufactured in France
  • Date of introduction: 1997
  • Date of this example: 1997? (inner pulley cage stamped Y7)
  • Model no.: unknown
  • Weight: 196g including hanger plate
  • Maximum cog: 32 teeth
  • Total capacity: 40 teeth
  • Pulley centre to centre: 86mm
  • Index compatibility: 8 speed
  • Chain width: 3/32”
  • Logic: top normal
  • B pivot: two pivots, front sprung and rear unsprung
  • Materials: largely plastic (OK - ‘composite’), inner parallelogram plate and outer pulley cage plate aluminium
Sachs Plasma derailleur additional image 01
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