I have a Bianchi mountain bike frame a bought c. 1990. It was new, but I do not know its model name because its original paint job had been scratched at the factory and it had been repainted by Bianchi. I am a little curious about the Cro-Mo tubing. The decal on the seat tube says "Superset II" and "Tange Cro-Mo". Does this mean 4130 Cro-Mo or something less. The top tube where the model name should be is blank, but the rest of the decals and the dark blue color are the same as the picture I saw on the internet of a Bianchi Advantage. I have recently re-setup the bike as a road bike with a Nexus 8-Speed hub.