Tires are changed in November when temperatures drop - in 2010/11 we experienced prolonged frosts and ice in Mid Wales and tires coped extremely well. February time we have the long drive to the Alps and generally go to Austria. Last year there was nothing untoward to worry about, but this year, Feb 2012 was a different matter altogether.
With prolonged snow all week and 2.2m that fell in 48 hours, driving a fully laden Land Rover with 4 adults and all our kit (Top box, back box etc) uphill ascent is easy, the problems are on the road travelling downhill.
Fortunately, I have had some training in off road situations by Land Rover, so I am aware of the outstanding capabilities of these vehicles, but at the end of the day, you are always going to be reliant on 4 patches of rubber on the ground. Thick snowfall, has the inevitable effect on transportation systems where priority is correctly given to arterial routes, major roads, cities, towns, villages and finally remote villages.
Our chalet was 10km from the nearest town and 4km from the nearest village. It was also at altitude approaching 1,800m. All mountain roads have poles to the sides - the top few inches were only just visible and the road was always covered with a fresh 30cm (12") new powder snow each day.
Our Nokian tires performed exceptionally on the ascent, but downhill with such a heavy car, I was required to use some of the gadgets to assist me. 2nd gear engaged and DSC engaged, the car performed impeccably. It was quite satisfying to see BMW saloons struggling despite winter tires and skidding dangerously when braking downhill.
Of course, these were exceptional conditions. However, covered 1,000 miles in the Alps this year coupled with the 1,000 mile journey each way. I commend these tires for this vehicle.