The new Superzero stem is the perfect combination of stiffness, lightness and aerodynamic shape. The stem has a trapezoid shape with a flattened top section for torsional stiffness and excellent aerodynamic performance. Designed for the most demanding riders, the stem is manufactured using an innovative 3D forging process with AL 2014 alloy. Recommended for use with Deda Elementi carbon handlebars only. Technical Specifications: Fork Clamp Diameter: 28.6mm (1 1/8\') Clamp Diameter: 31.7mm Material: AL2014 alloy Bolts: CrMo Steel Angle: 82 Weight: 140g (110mm)