Hallo Dirk
I'm an Iranian cyclist who would like to travel with bike time to time if I could save enough money for, my last trip was on the last autum and I started cycling from the Bazargan boarder( Turkey) to the south part of Iran, it took about 3o days as I stayed in the city on the way for more than 1 day, but totaly it was great.
anyway, if you have any question I will be happy to help you.
BTW, I don't know German
but my sister Maria could help me to translate your post
take care
Mohammad