I have purchased a 2009 SS/TC as a donor car and hope to order a kit yet this year. I have a question related to tire/wheel sizes. I'm located in Wisconsin and cold temperatures are a concern. I've heard too many stories of "summer only" tires cracking when subjected to cold temperatures. C7 Corvettes were arriving at dealers with cracked tires just from being transported in cold weather. For that reason, I'm looking at Ultra High Performance All-Season tires, more specifically, Michelin Pilot Sport A/S 3+285/35ZR18. The tire diameter is almost identical to the stock tire. I have noticed almost no one else is running 18" tires on their Goblin. Is there a reason why I should not use 18" tires and wheels?