Pneumatics!

Pneumatics 

What is Pneumatics? Pneumatics  works similar to a linear actuator. When i spin the grey gear on the right, the mini turn table moves up,


but pneumatics uses air to move up and down like this.
This is when there is no air.

This is when air is pumped in.

The air comes through this.

When pipes are connected to this pump and the pump is moves up and down the air pushes the cylinder up.
Here are more pics of the Extreme Cruiser
With bigger wheels