315/35/17 Nitto 555r for the summer 315 sumitomo for the cold seasons (not that I drive my cobra in the cold too much) When the Nittos wear out I will give the Mickey Thompsons a try
I ran 315-35-17 tires on my 17" wheels and am now running 295-35-18 tires on my 18" wheels. I wanted a wider 18" tire, but 295 is the biggest size you can get in the BFG KDW2 tires...