Zipp HAndle Bar TT Alloy Vuka CLIPON LOW Clamp With Vuka Evo 110 ExtensionFeatures The Zipp Vuka Clip holder, equipped with Carbon Evo extensions , is designed to provide all the performance and adjustments necessary to go even faster. Vuka Evo extensions reduce wind resistance by moving air over the rider's body more quickly while allowing the arms and wrists to have a comfortable and relaxed position thanks to an inward return of 20 mm and a multidirectional curvature. Vuka Evo Carbon extensions with 70 or 110 bend mm,