This is a pair of Zipp Vuka Carbon Aerobar Extensions. Zipp’s carbon Vuka Extensions give you all the options needed to optimize your aero position and go for the win or your personal best. All carbon Vuka Extensions come with an industry-standard 22.2mm diameter and are compatible with the Vuka Alumina Clip but not the VukaClip or VukaAero. All extension styles have a length of 360mm and have sleek internal cable routing. The carbon Race, Straight and Ski-Tip bends are compatible with all shifting systems, while the Race Vuka Shift is only compatible with SRAM 900 TT, 500 TT, R2C Aero Shifter and Zipp R2C shifters.