Vision Metron 4DContinuous carbon composite construction Aero Ergo flat top riser central section follows the natural arc of the arms with a 10 degree forward bend for more ergonomic climbing position and easier breathing Cable groove compatible with new Di2 systems w larger internal cable tunnel Reinforced and textured lever and stem clamping areas Bar width: center center from the handlebar tails Attributes Drop 125mm Stem Clamp Diameter 31. 8mm Outward Bend 2