I drove my Bridgestone Dueler H/P Sport RFT (Summer ONLY) Tires in the snow, 25 degrees F. ICE and 6" Inches of snow.... AND THEY DID AMAZING.

I realize some of you may consider this "negligent" however I am no newbie to snow driving and know perfectly well how to responsibly drive in the snow. They did not grip as well as snow tires I would assume but staying under 30-40mph they drove fine, turned fine, and stopped fine. The traction control is very smart on the x5.