A vision of what might have been - this derailleur would have been a killer product in 1975 (when Europe had not yet fully succumbed to the charms of Japanese designs). Unfortunately it took Simplex another decade to wake up and make this gear - effectively an affordable Shimano Crane. By that time it was only of interest to industrial archaeologists.

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1. •Brand: Simplex
   

2. •My category: Simplex - the bitter end
   

3. •Country: France
   

4. •Date of introduction: 1985?
   

5. •Date of this example: unknown
   

6. •Model no: unknown
   

7. •Weight: 263g
   

8. •Maximum cog: 30 teeth?
   

9. •Total capacity: 30 teeth?
   

10. •Pulley centre to centre: 46mm
    

11. •Index compatibility: friction
    

12. •Chain width: 3/32”
    

13. •Logic: top normal
    

14. •Pivots: two sprung pivots
    

15. •Material: aluminium knuckles and outer parallelogram plate, steel inner parallelogram plate and pulley cage plates.
    

0121/D