Bike fit

A good bike dealer should be your first step to getting a perfect fit.  This bike is too small for the rider.

Your bike must be big enough to prevent your knees from hitting the handlebars but not too big.  You do not want to have to stretch too far.

This picture shows the rider in a far better position.  Your leg should not be straight at the bottom of the pedal stroke but slightly bent.  With the heel of your foot on the pedal your leg should be straight.  When you pedal using the ball of your foot your leg will be slightly bent at the bottom of the pedal stroke.

You must be able to touch the ground.

Your saddle can adjust in three ways.  Most have a simple allen key under the seat and a clamp or a quick release on the frame.

Adjust the height so that your leg is slightly bent at the bottom of the pedal stroke.

Check the position by placing your heel on the pedal at the bottom of the stroke.

Handlebars can also be adjusted to feel comfortable.  It is very easy to adjust using a allen key.