I have now properly tested the R2s on snow and ice, as you can see here:
https://twitter.com/slcuervo/status/540885443165032448
View attachment 65639 View attachment 65640
My conclusion is: despite de disappointment related to poor grip on wet and/or damp roads, the tires meet my expectations (which were very high) on snow, and it has also been a pleasant surprise to find out how good they are on pure ice.
My summary of the NOKIAN Hakka R2s:
Conditions / Grip under strong acceleration / Handling
- WET & DAMP: poor / average
- SNOW: good / good
- ICE: good / excellent
When I say pure ice above, I mean a parking lot that has a layer of a couple of cm of ice, where it is very difficult to walk. I was really surprised of how easy it was to manoeuver with the car responding very well to all change of direction at moderate speeds (below 20-30 kph).
Anyway, excellent tires if you are going to use them in proper winter conditions. For those who will go through more humid conditions than ice/snow, not recommended.