To attain top speed, a rider has to find the precise balance of aero position and power. For the vast majority of riders, this balance is only possible with a very adjustable bar system.

The Vantage 8'a aero section has minimal frontal area, with just enough width to get a cable through.  Concealed cables and tight armrest/bar spacing work to reduce drag.  Grip and armrest are in the same plane, offering a position that decreases drag and allows the rider to recruit arm muscles to help stabilize the trunk, adding to power output.