The innovative Genisis Series dual spring set up contains a specially designed Multirate outer spring and a one of a kind Genisis inner spring that are assembled together to make the Genisis Series. The Genisis Series works great whether you ride alone or with a passenger, by putting the Genisis spring inside the outer fork spring it allows the springs to work together instead of against each other. The inner fork spring is there when you need it for hard braking and extreme riding conditions of any kind, making them almost impossible to bottom. Each standard Genisis Series kit comes with two Genisis series fork springs (preassembled), 4 Genisis washers, aluminum spacer and instructions.