The zipp quickview tt garmin gpscomputer mount 223mm quarter turntwistlock ensures an uncomplicated easy to install mount for aero bar extensions for your garmin computer with the added bonus with being extra lightweight vibration and slip free to provide perfect stability for you navigation the zipp quickview tt garmin gpscomputer mount 223mm quarter turntwistlock features 223mm industry standard quarter twist mount installs simply and securely on aero extensions