Originally posted by AcuraFanatic
Would 215/40ZR-18 correct that, or 215/45ZR-18? 
And aren't you able to correct that via computer tinkering? :dunno:
If you want 18"s then get 225/40/18. on 17" depending on whether it is a 7" or 7.5" rim you can get 225/45/17 on 7.5" and 215/45/17 on 7.0" rims (width)...check out the site below for more info...
http://www.miata.net/garage/tirecalc.html