I believe that the DNP GX series were friction derailleurs, while the DNP Epoch series were index compatible. I have never been able to detect much difference in geometry between the two - but who am I to say.

Using the Geological definition, an ‘epoch’ is a span of time smaller than a ‘period’ and larger than an ‘age’. Which reminds me of a driving instructor who sternly informed me that you should use the hand-brake when a ‘pause’ becomes a ‘wait’ - very handy information when you have a driving test to pass.

Despite these musings, the Epoch 6 remains a strongly constructed, but creativity-free copy of a Shimano Tourney.

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1. •Brand: DNP
   

2. •Country: Taiwan
   

3. •Date of introduction: 2000?
   

4. •Date of this example: unknown
   

5. •Model no: unknown
   

6. •Weight: 329g including hanger plate
   

7. •Maximum cog: 28 teeth?
   

8. •Total capacity: 35 teeth?
   

9. •Pulley centre to centre: 75mm
   

10. •Index compatibility: 6 speed
    

11. •Chain width: 3/32”
    

12. •Logic: top normal
    

13. •Pivots: two sprung pivots
    

14. •Material: steel
    

0066/B