They didn't have any 50cm or 48cm in the cannondale at the bike shop. I was able to try a 52, but that was way too big for me. I did go to another bike shop and tried a Raleigh militis Elite road bike in 50cm and that was decent, but I felt I could've went down a size.

Wish I can try a 48cm cannondale since that's the bike I most likely will be purchasing. I can't get a refund if its the wrong size. So I'm curious to know. I know it depends more on just your height, since everyone has different size arms, legs, torso, etcs. A lot can matter in how it all fits. But I'm pretty sure that for a cannondale road bike that I will either fit a 48cm or 50cm. However I'm leaning towards the 48cm.