Driving M Sport with run flat - Goodyear LS2 all season 19" (245/45R19).
Don't have spare tire.
According to tirerack.com there only 2 winter run flat tires for my car:
http://bit.ly/qFD1bc
1) Dunlop SP Winter Sport 3D RunOnFlat
2) Pirelli Winter 240 Sottozero Serie II RFT
Which one is the best ?