I just finished testing the prototype of the Sarma Naran 80 carbon rim. I'm aware of all the features of these nice and cheap workhorses. Those rims have been specifically designed for Siberian snow and extremal tours of the Lake Baikal, but we want to make them available worldwide!
http://sarmabikes.com/products/carbon-rim-fatbikes
If anybody want to know more about Sarma Naran 80 rims, I may give some answers!
and another carbon rim... but this one's offsetable
Prepare for the wheel assembling
The testing of the prototype on the ice of the Ershovsky bay