Zipp's Straight Carbon Aerobar Extensions allow you to get low and aggressive for time trials and triathlon. These extensions are made of hand wrapped carbon fibre and are compatible with most "plug style" shifting systems. With intergrateded cable guides no drilling is required. These bars have a diameter of 22mm and are compatible with the Zipp VukaClip aerobar mount. A cutting guide on the underside of the extension means these bars are trimmable to your preferred length.