Ritchey tires have won more World Cup races than any other. Our SpeedMax series consists of semi slick designs for minimal rolling resistance, maximum acceleration and all out speed in hardpack conditions. Our Z Max series is based on Z.E.D. Z Max Evolved Design philosophy, designed for optimal traction and handling in a variety of conditions. Our newest additions to the Ritchey WCS lineup build on that heritage: the Z Max Premonition, Intuition and the SpeedMax Beta combine new Dual Compound rubber with world cup winning Vector Force Analysis tread technology. The result is the next generation of tires worthy of our name.