compact double v triple? (my new bike!)

[SadieKate]

I don't know if you'll be able to get something that small with STI. I use friction shifters.
V.

Sure you can. It is a function of the curve of the front derailleur matching the size of the rings and then the tooth differential between the large and small. With Campy I can have a 24 tooth differential (26 inner and 50 outer on the Litespeed, 26 to 48 on the Kelly, 28-52 on the Mercian). I think Shimano is about the same but the spec's would say.