So.... I bought my 97 Miata on Ebay about four years ago and it had some aftermarket 17" rims and tires mounted. One of these rims is out-of-round and will not balance. I am saving my tokens to replace them all and would enjoy hearing suggestions as to what size I should go to in order to get it back closer to original specs. Many of my Miata club friends have told me to go to a 15" rim/tire and I would be very pleased. What is your opinion and why. Thanks again for your anticipated responses.