During the 1980s and 1990s, EDCO, a Swiss company that made beautiful Swiss products with precision Swiss bearings - bottom brackets, headsets, hubs, all that good stuff - decided that it wanted to offer complete groupsets.
Its chosen approach was to buy in components like brakes and derailleurs. EDCO sold its high-end Swiss bicycle jewellery at high-end Swiss prices - so, coming from French-speaking Switzerland, it was looking for the very best derailleurs that the Francophone world could provide.
My knowledge is a touch sketchy, but I am aware of six generations of these EDCO derailleurs:
- The first EDCO derailleur that I remember, possibly from 1984, was a rebranded Simplex SLJ6600 T. This was, arguably, the top of Simplex's range at the time.
- Then, possibly in 1985, I think they used a rebranded Simplex SLJ5500 T. This was arguably a step down from the SLJ6600 T, but was marginally lighter, and possibly more 'racy'. Or they may have made the change because Simplex was in some chaos at the time.
- In 1986? they dropped Simplex and adopted a rebranded version of Sachs-Huret's top-of-the range New Success (47.1D). This had a cleaner, more modern, look that fitted better with the EDCO aesthetic. At the time Sachs-Huret also made a lot of noise about how they were determined to build a top-quality technically advanced brand. Finally, I think that EDCO may also have offered a version of the long cage Sachs-Huret New Success Touring (47.1T).
- In 1988? EDCO moved into the world of indexing with a rebranded Sachs-Huret New Success ARIS (47.2D). The EDCO version of this derailleur had something of a cult following, because it was anodised silver, rather than the grey colour of the Sachs-Huret original. Again, I think that EDCO may also have offered a version of the long cage Sachs-Huret New Success ARIS Touring (47.2T).
- For 1990? EDCO moved up to the 8-speed Sachs-Huret New Success Sport (54.01D). I don't know if EDCO offered a long cage version.
- And finally in 1994? moved on to the Sachs New Success Sport (RNS 00). This was offered in a choice of 'looks' - silver anodised for the 'racing' groupset and with a black & red outer parallelogram plate for the 'triathlon' groupset. EDCO additionally offered the long cage Sachs New Success MTB (MNS 00) derailleur both as part of a touring groupset and also as part of a mountain bike groupset.
- ...
And there is probably more that I have forgotten (or never even knew) about.
This is a rather lovely example of the sixth generation described above. It is a rebranded Sachs New Success Sport (RNS 00).
Some distinguishing features include:
- There is no sprung cable saver built into the cable stop so the inner paralelogram plate can be aluminium.
- The cable adjuster is a chunky but tapered design that is easy to grip.
- It has an 'aero' outer pulley cage plate without any cutouts.
- The inner pulley cage plate has a kink at the tension pulley.
- It has steel pulley bolts.
- It has a centeron-style guide pulley with rubber seals and a tension pulley running on a cartridge bearing.
- Derailleur brands: EDCO, manufactured by Sachs
- Country: Switzerland, manufactured in France by a German company!
- Date of introduction: 1994?
- Date of this example: unknown, inner pulley cage plate stamped 'W4'
- Model no.: unknown
- Weight: 252g
- Maximum cog: 30 teeth (based on a Sachs-Huret New Success)
- Total capacity: 28 teeth (based on a Sachs-Huret New Success)
- Pulley centre to centre: 50mm
- 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