The Zipp Vuka Carbon Race Extensions are the perfect addition to your Zipp aero bar. They help keep the rider in the most aerodynamic position possible without sacrificing comfort. With the goal of feeling like the rider is shaking hands with the bar the 52mm rise helps keep the riders wrists at a natural bend to help them stay in a tuck position for long periods. Using carbon for the extensions does more than just reduce the weight of your setup. The unidirectional carbon can be shaped in ways that aluminum cannot, allowing for incredibly complex and precise ergonomics. A 20mm inward roll of the bar can be adjusted as can the width of the pads. With a perfect fit for riders using under base bar extension mounting, the Zipp Vuka Carbon Race Extensions are one of the top choices for professional riders.