DISRAELI GEARS

Precision Billet Proshift purple (1st style)

Precision Billet Proshift purple derailleur (2nd style) main image

Of all the various US made CNC-art-object derailleurs of the mid 1990’s the Precision Billet Proshift seemed to me to offer the most. They were devastatingly light, had two sprung pivots (and so were widely considered to work with Shimano SIS) and had all the trick elements; stainless steel fittings, sealed bearing pulley wheels etc.. Precision Billet also seemed to be a serious company intent on actually manufacturing hardware rather than vapourware.

I am aware of six generations of Precision Billet Proshift derailleurs, which may go roughly as follows:

  • I believe that the first generation was shown at Interbike in 1994, although production may not have really got going until early 1995. It was a furturistic object with complex 3D CNCX knuckles and a very large flat outer parallelogram plate.


This specimen has a ‘medium’ length pulley cage, and the slightly more surreal looking, chunky, style of parallelogram.

I like the combination of the rather beautiful lush purple, which seems to have come from the world of home furnishing, with the exaggeratedly machine-like forms. Holy moly - it’s Robocop meets Lawrence Llewelyn-Bowen


  • Derailleur brands: Precision Billet
  • Themes: A riot of colour
  • Country: USA
  • Date of introduction: 1994?
  • Date of this example: unknown
  • Model no.: unknown
  • Weight: 174g
  • Maximum cog: 32 teeth?
  • Total capacity: 36 teeth?
  • Pulley centre to centre: 67mm
  • Index compatibility: 8 speed
  • Chain width: 3/32”
  • Logic: top normal
  • B pivot: sprung
  • P pivot: sprung
  • Materials: aluminium
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