Technologies related to road bike production have extremely developed in the past decades. However the styles of road bikes still remained the same. During the earlier times, the wooden hobby horse was used as bike frames where the rider pushes the frame using his feet. Today, things have changed exceedingly but some of the basics still remain the same, such as the basic frame and two wheels.
The materials which were used for making the cheap road bike frames have also changed, but the design basically remains almost the same. From the earlier times until today, the materials used for making bike frames slowly starting to become lighter. Today, lighter materials are being used such as titanium and carbon fiber on which carbon fiber is the well-known material. Carbon is such a strong and light material but is expensive as compared to others.
Road bike wheels were made of steel in the ancient times, later, alloys were used. Today, carbon rimmed alloy parts are being used and it more likely they are going to last for a long time. Furthermore, other parts of the road bikes and wheels were also made in steel. Now they can be found in carbon and titanium.
During the time that the pedals and cranks were created, they were built in the front wheel. The size of the gear was obtained depending on the wheel size. The chain was then created which lets you get the wheel of the same size as well. The gear size varies on the number of teeth of the sprockets on the back rear wheel as well as the number of teeth of the chain wheel on the pedal. The production of gears provides you to pedal up and down the mountains safely.
Things began changing because of the gears. Before there were only three gears but now riders can utilize up to thirty gears. Today things come a long way for the modern bike pedal parts because of human ingenuity.