Vision Metron 4D Di2 Compact Handlebar 42cm GrayFSA Vision Metron 4D Compact Handlebar combines aerodynamics and ergonomics with its Aero-Ergo central section. The Aero-Ergo central system has a slight rise and 10 degree forward bend that follows the natural position of your arms for comfort and breathability. The wing-like shape of the bars enhances aerodynamics and with a larger internal tunnel, the handlebars can accommodate wiring for electronic shifting. Reinforced carbon construction gives these handlebars durability.Available in 40cm,42cm and 44cm.400310082770