There are many reasons why you might want to purchase a carbon fiber bike frame. For one, carbon fiber is stronger than steel. It also weighs less and therefore takes less effort to propel yourself forward. This means you'll be able to ride your bike farther and for a longer period of time with less fatigue. If you want to do some hard training on your bike, a carbon fiber frame can be a great investment. Compared to a steel frame, a carbon fiber frame can also be more aerodynamic. This is due to the interesting shapes that carbon fiber can be made into. Unlike steel which usually comes in rods. Meaning shaping the material can be somewhat limited.