I went on the Nashbar site and saw your bike. I noticed that it also comes in a 19". Why do you think the 17" will do the trick. If the 15" is as ridiculously small as you insist why do you think a small increase in ETT length will make much difference? The reason why hybrids and Mountain bikes can have three sizes of frame where road bikes need six is because the rider sits so much more upright on the flat-bar bikes that the main difference between two riders will be seat height. This can easily be accomodated by an increase in seat post. I was looking at my SO and her mother standing side by side. My SO towers over her mother. Like a full head taller. But their legs are the exact same length! When your torso and arms are very long you will need more ETT (effective top tube length) than a more traditionally built woman with a very short torso. You bought a women's specific model of bike and these will have a shorter ETT than normal for a mens or unisex frame.