Originally Posted by EjustE

Back to the original poster's question...

I think that I remember Univega (and Shogun as well) making some triple butted CrMo framed mixte bikes in the 80s. If I am not way off, these guys would probably be as light as they get (other than older 531 bikes with 120mm spacing and Paramount Mixtes - which might not be a good value proposition)