Originally Posted by
Blackdays
The components won't affect her speed.
I would get her Sora, because she will grow out of the bike soon (like you said).
Plus, she won't know the difference.
I disagree - the sora thumb levers may be difficult for small hands to hit while in the drops.
To the OP: if you're not concerned about 9 vs. 10 speed, I would buy Tiagra for her.