When constructing their carbon fiber frames, Cannondale uses high strength, high impact resins similar to those used in carbon baseball bats. The fibers and resins are put in a lay-up designed to maximize the anisotropic (direction specific) qualities, making for a bike that is light and stiff, and capable of absorbing impact without damaging the structural integrity. Once the frame has passed quality testing, Cannondale adds stiffer, higher-modulus fibers in safe areas to increase stiffness and tune the ride.