Materials
All aerodynamic wheels on the market today are constructed from carbon fiber, aluminum alloy or a combination of the two. Carbon fiber is made by carbonizing 
acrylic fiber at high temperature. These fibers are then woven into cloth, which is relatively easy to work with and allows tremendous design freedom. Trying to duplicate our wheel shapes in aluminum and maintain light weights would be impossible. We don't even try. Carbon can be molded into whatever shape or structure best suits the design, and each layer's strength and weight can be specified to tune in perfect ride and strength characteristics. Try doing that with any other material. Carbon fiber's strength to weight ratio and large variety of fabric strengths and weaves allow us to make wheels that are not only light and rigid, but also strong and durable.
