The 18's are 18 x 8.5. Is that way too wide to be putting on an eclipse? The 17's are 17 x 7, which should be fine, but I would really like to get 18's. Also, just so I can start pricing tires, which size tire's should I go with for either 17's or 18's? I'm new to the rim business, and could really use your input. Thanks!