I intend to order the Nokian Hakkapeliita 7 tires, with studs, which are legal for use in California between Nov. and April. I will be using them late DEC to early MAR.
They are run flat with studs and available in stud-less (Hakkapeliita R2) as well.
I think these tires were designed with X5, Audi and Cayenne in mind.
More info:
http://www.nokiantyres.com/winter-ty...kkapeliitta-7/
