Campagnolo is all about bicycle evolution and their Ultra-Torque cranks prove it. They sport an integrated axle design which is unique in the industry with two axle halves joined together via a toothed Hirth joint in the center. Bottom-bracket bearings are included and fit into outboard cups (sold separately). The resulting boost in stiffness allows the carbon crankarms to be thinner and lighter than ever before. Plus, the Chorus chainrings sport special plating for quiet shifts and long life.