Zipps new carbon vuka extensions give you all the options needed to optimize your aero position and go for the win or your personal best the zipp vuka carbon race 222mm aerobar extensions features the innovative race bend all carbon vuka extensions come with an industry standard 222 mm diameter and are compatible with the new vuka alumina clip but not the vukaclip or vukaaero all extension styles have a length of 360 mm and have sleek internal cable routing