The Zero1 stem is the perfect combination of stiffness, lightness and aero shape. The Zero1 stem is made of 6061 aluminum series and is manufactured using an innovative 3D forging process. The flat top section of the stem perfectly matches the modern road bikes design. Designed for the most exigent riders at an unbeatable quality to price ratio. Available from size 70 mm to 130 mm and BOB (black on black) finish.