03. The spoke is then put into a CNC mill and the spoke design is created. As you can see for the Twista design, the mill simply cuts into the 90-degree edges of the square stock to give it mix of machined and squared surfaces for a four-cornered ripple effect. Depending on the length, it takes about 15 minutes to design the spoke. Once the spokes are finished, they are given a high-polish finish to gleam in the sun.