Hello,
Have an 08. Looking for a wider look. I have read all the posts about different tire sizing options and it looks like 235/50/17 is the best plus zero size since the diameter stays the same - but everyone I have talked to said it is TOO aggressive and will probably rub - local shop refused to even order them. Is anyone actually using 235/50/17? Older posts referenced them - just wanted to see how it is going.
By the way, for those that have not used this - here is a pretty good tire calc tool:
http://www.miata.net/garage/tirecalc.html