Hi!
I will cycle together with a friend from Istanbul to Tibet and further starting may 2nd so you have a headstart.
We will be in Iran between 5.06 and 05.07 and afterwards cycle through central asia (Turkmenistan, Uzbekistan, Tajikistan, Kyrgistan) to Tibet.
So perhaps we can cycle some parts together depending on your route and schedule.
Just check
http://itchy-wheels.exploder.org for tour updates
Good luck with your Iranian visa and cycle the world,
Whisky