If you don't try the 49 cm you'll never know. I rode exceedingly large frames for my size and never had an issue. Not sure why people seem to want both feet on the ground. Maybe as a result of me growing up on the large frames, I got into the habit of standing on one leg with the other on the pedal ready for the light to change. Of course the bike has to lean a little, but not much. However I do have longer legs than many people four inches taller than me.