1 piece custom carbon fiber seat&seatpost

[steel515]

Is there someone who makes this? In germany?

[prendrefeu]

There are a number of people who make these. Many, in fact.

Here is one, but he is in Slovenia.
viewtopic.php?f=10&t=80684

In Germany, contact Nordischer-Rahmenbau, for example. You can also check the German "Light-Bikes" forum for resources. There's some magic happening over there, too.
http://www.forum.light-bikes.de/

[1spd]

I know that first thread is about 2 years old but Berk is still working his magic and grown up quite a bit (reading the entire thread will give you a lot of insight but will also take quite a while!).

Definitely lots of them out there for sure!

[Fuchspk]

the best one in Germany would be http://nlbcarbon.blogspot.se

Norbert makes excelent 1piece kombos and is a great guy to work with!

[415brian]

http://www.DashCycles.com has some innovative products. ~100g and $1,000 for the combo...