What can I say… Just ignore all the panicky previous posts!
Crossing the border was a piece of cake (10 minutes on the Iranian side, a bit more on Kurdish side). And cycling to Rowanduz was even easier – it went down down down for pretty much all of the remaining 65km.
Besides, Iraqi Kurdistan is peaceful and friendly.
I’m couchsurfing with Mahdi, which is amazing.
Cycled: 80km