Hello all. Im looking to purchase a road bike. Right now i'v been riding for 2-3 daily on a very nice mountain bike that i'v had. Im 5'6 and wondering what size bike i would need. Im still growing ( 16 years old) so i dont want one that fixes too perfect or i wont be able to ride it next year. If someone could please tell me the mesurements i should look at before buying a used bike online that would be great!