There are different ways to set up your bike due to your type of riding.
Street
Usually has strongest parts of all the styles. The parts are not only strong but
they are heavy as well.
Here's a Picture of a "Street" bike.


Dirt
Similar to street since most riders ride street and dirt. Usually large tires, lighter weight parts then street.


Vert
Vert bikes are pretty heavy as well due to all the stuff needed to ride. they use 4 piece handle bars. Skinnier tires. Front brakes. And four pegs.

Racing.
Racing has the lightest parts because its easier to pick up speed on a light bike then a heavier bike.


Flatland
Flatland has pegs that have more grip, skinner tires, a smaller frame, and a gyro.
