The new zero1 stem is the perfect combination of stiffness lightness and a refined aero shape its made from 6061 aluminium and its manufactured using an innovative 3d forging process the flat top section of the stem perfectly mathes the top tube of a modern road bike designed from the start for the most demanding riders at an unbeatable quality to price ratio features material 3d forged alloy 6061 angle 82deg handlebar dia 317mm weight 145g 110mm