Originally Posted by Redbullet

Thanks very much for the answer.
I had some difficulties in finding all 9 speeds elements, but I managed to find some parts for 10 speeds - Shimano Tiagra: 10 speeds right shifter plus 10v cassette and chain.
The question now is whether this 10v Tiagra setup matches the actual setup, grateful if you can further advice:

Actual setup:
- A hub that carries a Sunrace 8 speeds cassette 12-25
- Microshift rear derailleur, long cage. It keeps now minimum 1.5 cm distance from biggest cog (25) and has a large reserve for stretching 3 extra teeth.
- A triple crank

Replacement:
-Tiagra 10 speeds right shifter
-10 speeds Shimano cassette 12-28
-Shimano chain 10 speeds


Thanks