Zipp: Securely place vital ride info where you need it for triathlon or time trials with this uncomplicated computer mount for aero-bar extensions that is easy to install, lightweight and above all vibration and slip free.The 22.3mm industry standard quarter-twist mount installs simply and securely on aero extensions. The Zipp QuickView TT Computer Mount is aerodynamically shaped for left-side installation, but also can be installed on the right bar extension. Comes with single Torx T25 bolt, flexible mounting clamp and one quarter twist mount.