A proper reach to the handlebars is the key to enjoying comfortable rides. If the bars are too close or too far away, you may experience neck, shoulder, back and hand pain. And, it can cause you to scoot backward or forward on your seat all the time. On most bikes, to change length, you must replace the stem. And stems come in a variety of types and diameters. So you may want to have us check your position and suggest a proper replacement.