Rack up and pack up this topeak beam rack is specifically designed for sleek road bikes turn your road racer into a weekend tourer with this lightweight rack it mounts to your seat post with ease so you can get up and running or cycling in no time please note e type is for normal sized frames and v type is for large frames key features equipped with detachable side frames al 6061 t 6 aluminium construction 15lb carrying capacity includes shims to fit all seatposts integral bungee