If a person has grown up riding regular bicycles and hasn't had much exposure to the sport of cycling, they wouldn't know that there are different types of bikes for different types of cycling sports. One such type of bike is the racing bike. A racing bike is very interesting to see for the first time because it is built differently than a regular bike. It has all the normal parts like a seat, handlebars, wheels, brakes etc, but the way those things are built to work together is what makes a race bike different.
A huge part of a race bike's effectiveness is its weight. To be fast it cannot have much more than necessary in its build. As a result, racing bikes are probably not the most comfortable. They have to be light and aerodynamic so that they can go as fast as possible.
The structure of the wheel is a very important part of the racing bike. How the rim of the wheel is shaped affects its aerodynamics. Also, the number of spokes it has affects its aerodynamics. Fewer spokes, and even a different kind of spokes than regular spokes help this. The rim of the wheel is commonly made of aluminum because it is so light and heavier metals would slow the bike down. The tire itself has to be lightweight with tread that is very thin and smooth. The tires are also very narrow compared to normal bike tires in order to improve aerodynamics.
Besides the narrowness and lightness of a race bike, something else that can be different from a normal bike is the position of the handlebars. The handlebars are placed lower than the seat so that when the rider is on the bike, he/she is in the most aerodynamic position.
Race bicycling is a lot about being aerodynamic and lightweight so that you can reach the fastest speed possible.
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