Vision TFA Integrated Handlebar/Aero Bar - Carbon Integrated 90mm 40cm BLK JS BendVision TFA Integrated Handlebar Aero Bar Carbon Integrated 90mm 40cm Black JS Bend. The Metron Aerobar system features a flip flop carbon wing basebar ergonomic extensions and a snakebite stem which integrates the system together. This allows for an internal Di2 junction box with internal cable routing along with one of the highest adjustable AM option currently available. Fit increments in various dimensions are the foundation of the Metron Aerobar