first: please use the english language for your next message, because most users in this forum can´t understand german, ok?
i think it is possible to build a fully under 8kg. my bike will have under 8.3kg really complete (also with computer), but it´s not ready because some parts are not yet available. if it´s ready you will see it on this website, of course
but to make it 300g lighter, i had to use parts like the lightest schmolke carbon bar, no bar ends, old precision derailleurs and sachs wavey shifters, titan chain and stuff like that. and i want to use my bike for cc races and marathons, so it have to be a little bit functional... a very little bit...
and don´t buy the scott strike for this project, it´s to heavy! my extralite f1 has 1950g with steel spring and i think just 1900g with titan spring.
falls du kein englisch kannst, schreib mir ne mail an email@example.com
, dann unterhalten wir uns über deinen plan