Just purchased 2014 P85D with 21" wheels with Pilot Sport tires. I live in Reno where we don't see snow all winter on the ground. The Tesla mech recommended I switch to 19" wheels and Pirelli Winter Sottozeros for winter driving. So I'd be looking at wheels and tires. Just wondering what the winter drivers recommend for a cheaper/smarter alternative for wheels and tires. Not really into paying a small fortune. Thanks!!