Update:
I found this Cassette in my local Decathlon : 9 speed 11-32 (
11-13-15-17-19-21-24-28-32).. but they say its for MTB (
360 grammes)
will it fit in my bike? Should i replace also the rear derailleur?
https://www.decathlon.ma/cassettes-v...efined-8298767