Hi ZThis and welcome to CT. If you can swing it, buy dedicated wheels for winter and put snows on all 4 in the same size so you can rotate them every winter.

Keep the factory wheels for the summer and do not attempt to use them now. The stock tires are Summer rated only and you are asking for trouble trying to use them up here in the winter.

This site and G350Z.COM are good forums to view. We at G350Z.COM have many CT, MA, ME, NY and NJ 350Z and G35 members.

 

Just get the Michelin Sport A/S tires. Great in the snow and good traction, performance all yr round. But costs $200 a pop. Now I have a daily beater. Dont worry about other drivers hitting my Z or the corrosive salt.