i don't know about hi-tech or light as air, but i have an aluminum iro with a renyolds ouzo pro full carbon fork. it's by far my lightest bike. complete it weighs 17 pounds. i'm getting some triple ti eggbeaters that i'll probably throw on it as well. i think my wheelset adds the most weight. http://www.fixedgeargallery.com/2004/fiedler.htm