Properly fitting yourself to your bike is very, very important to preventing injury, setting yourself up to pedal the most efficiently as possibly, and to enjoy you bike as much as possible. It's really important to make sure you have a proper fit on your road bike. If you don't have a proper fit it's going to lead to injury, as well as a completely inefficient way of pedaling your bike.
So the process of getting fit for your bike takes a little bit of time. It first begins with talking to your salesman about which bike will fit you the best, which model will fit you the best. After you've determined which size, whether it's a 50 centimeter or a 55 or a 58 centimeter, then you actually adjust the bike to you. Road bikes are incredibly easy to modify within a millimeter. Stems can be adjusted, handle bars can be adjusted, seat posts, rails, pedals, cleats, all of these things can be adjusted to within a millimeter. What you want to do is you want to work with a certified fitter. It usually takes about and hour and a half, two hours, maybe longer and they're going to work with you to determine the most efficient way to pedal your bike.
Many bike shops offer fits. What you want to look for in a fitter is someone who has been certified by either Specialized or Serotta or another sort of fit school. You're going to talk to them, they're going to do an interview process, they're going to determine your flexibility, they're going to determine your inseam and then they're either going to put you on a trainer with your own bike or they're going to work with you on a fit bike. So when you do decide to buy a road bike you should ask if a fit is complimentary with that. Most bike shops offer a fit that goes with the purchase of a road bike. And those are some things to keep in mind when getting fit for a road bike.