The new gen Mazda Miata will be 4x100, I have seen the pics of the Sema race car, indeed 4x.....most likely 100....that means some great 17" wider wheels will be coming out for it, I bet certain companies have been working on it already. Those of use that want great low weight, roll formed, 15" wide race wheels are already set and later can get some great 17's, maybe some 18's but that is to big for this little car, I would rather run 16 if I could get the right setup.