The zipp vuka bull carbon base bar is based on cutting edge aero research and feedback from leading fitters with a slightly concave nose section and forward swept arms the airfoil shape reduces drag stiffens the bar and complies with all uci regulations meanwhile weve added a host of ergonomic features most notably the vuka bull is available with a choice of zero or 40mm drop the clamp area now provides an extra 10mm of lateral adjustment for clip on aero bars and the grips have been