In reply to lardarse:
We were there in February this year and were amazed at what the hire car winter tyres coped with. In a word, everything! Our car was a Citroen 3 and we used Ryanair Torp. There is a steep hill down to and of course back up from Vemork Bridge car park - and many more elsewhere - and I was very impressed with tyres. They handled hard packed road snowice, soft carpark snow and shiny ice with ease. No probs! Still have to be sensible with driving though.