Zipps sl 70 aero is in every way a high performance bar this unidirectional carbon handlebar is packed with innovations for best in class fit ergonomics and aerodynamic performance with its wing shaped bar top the sl 70 aero features zipps latest bar refinements while building on the trend setting aero legacy of the vukasprint the bars distinctive wing shaped top is designed using computational fluid dynamics cfd the same software used to design zipp firecrest wheels our research