Go to Wheel Werks on 39th South. At least, those are my go-to wheel and tire guys.I've asked the dealership and they referred me to a local tire shop. So the gt comes with summer tires. I'm trying to find out if getting all season will work just fine instead of winter tires. I don't think it snows enough in Utah valleys to get snow tires. The manual says to get the exact size that your summer wheels and tires are. The local tire shops wheel measurements are a half inch off for one of the sets. They can get the same stggrd tire size. I'm reluctant to do it since one of the wheel sets measurements are not what the manual says. Where does a guy go to get every thing correct if the dealership and tire shop can't do it.