Just bought a 2016 328i x-drive wagon, and want to put on my snow tires from the old car. The tires have only 4,000 miles on them, and the person i sold the old car to didn't want them. I tried bolting them on, and the bolt pattern is the same. Here is the issue. The new car has 225/50-17 tires, and the snows I have are 205/55-16. The way i figure, as long as the rolling radius is the same on all four tires, why won't they work on the new car. They were, by the way, on a 2008 328i x-drive wagon. By reducing the rolling radius, i guess the speedo might be off a bit, but, not that big a deal. Discount Tire Direct's web site, says that i could use 205/55-17 as an alternative. What are the potential issues i could have?