Get the initial steps to bring the bike with the measures used. This application will tell you the steps to mountain bike and road bike.
He tells you the size that suits you, saddle height, saddle to handlebar distance ...
These measures are indicative, once you have them, you will have adjust them for the position that best suits you.

Get the development according to the number of teeth of the plate, the numbers of teeth of the pinion and travel per rotation of wheel.