Cassette change - Shimano STx compatibility

Ugo51

Retro Guru
Hi,

My Cinelli Rampichino has a 11-28 7 speed cassette and Shimano STX derailleur.
I would like to make it easier to climb with, and I think the max I can go is 32 teeth. Can I use any Shimano 7 speed cassette? I think there is a 14-32 Sora which would serve me well.

Any input whether I can go up to 34 teeth is well appreciated.

Cheers
 
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