DISRAELI GEARS

Campagnolo Athena (RD-01AT)

Campagnolo Athena (RD-01AT) 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 slightly underwhelming 'affordable' derailleur is an early example of a Campagnolo Athena (RD-01AT). I guess that it is a Athena (RD-01AT) because it has a thin-walled outer pulley cage plate with no cut-out at the guide pulley. I speculate that it is an early version because it has a cyclindrical cable adjuster and the inner pulley cage plate has a simple shape around the tension pulley and no spoke deflector.

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 steel pressing.
  • The cable clamp nut is a Allen nut.
  • The pulley wheels are Campagnolo's typical plain bearing design, in black.
  • The outer pulley cage plate is a thin-walled aluminium part with a rather crude rotation stop.
  • The inner pulley cage plate is steel with a simple shape and no spoke deflector at the tension pulley.


  • Derailleur brands: Campagnolo
  • Categories: Campagnolo - the locust years
  • Country: Italy
  • Date of introduction: 1991?
  • Date of this example: unknown
  • Model no.: RD-01AT
  • Weight: 249g
  • Maximum cog: 26 teeth (Source: Campagnolo)
  • Total capacity: 26 teeth (Source: Campagnolo)
  • Pulley centre to centre: 46mm
  • Index compatibility: 8 speed
  • Chain width: 3/32”
  • Logic: top normal
  • B pivot: sprung
  • P pivot: sprung
  • Materials: largely aluminium with a steel inner pulley cage plate and inner parallelogram plate
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