DISRAELI GEARS

Campagnolo Chorus (RD01-CH 2nd style)

Campagnolo Chorus (RD01-CH) derailleur main image

In the late 1980s and early 1990s Campagnolo produced a bewildering array of derailleurs that all looked extremely similar. This poses the perfect puzzle for derailleur geeks who can endlessly debate exactly which is what.

I think that this battered derailleur, with its rather evocative, ghostly, faded, logo is an mid-life example of a Campagnolo Chorus (RD01-CH). I guess that it is a Chorus (RD01-CH) because it has no ball bearings in its pulley wheels, an Allen key cable clamp bolt and no spring adjuster on the p-pivot. I speculate that it is an mid-life version because the inner pulley cage plate is a pressing. There is probably someone out there who knows for sure - if that someone is you, please let me know!

A list of relevant details might include:

  • There is no spring adjuster on the p-pivot.
  • The cable adjuster is round and threads straight into the aluminium of the b-pivot.
  • It has a double parallelogram spring using ~1.5mm wire.
  • The inner parallelogram plate is a stippled aluminium pressing.
  • The cable clamp nut is a Allen nut.
  • The pulley wheels are Campagnolo's typical plain bearing design, in black.
  • The inner pulley cage plate is a stippled aluminium pressing and has no spoke deflector.


  • Derailleur brands: Campagnolo
  • Categories: Campagnolo - the locust years
  • Country: Italy
  • Date of introduction: late 1992?
  • Date of this example: unknown
  • Model no.: RD01-CH
  • Weight: 246g
  • Maximum cog: 26 teeth (Sutherlands 6th edition)
  • Total capacity: 26 teeth (Sutherlands 6th edition)
  • Pulley centre to centre: 46mm
  • Index compatibility: 8 speed
  • Chain width: 3/32
  • Logic: top normal
  • B pivot: sprung
  • P pivot: sprung
  • Materials: aluminium
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