I got 16x7.5 rims with 235width n 50 profile i was wondering if i got 215 tire would the rims fit. right now the tire hits the strut so im using stock rims right now. So what would the rims fit in the front?

http://www.miata.net/garage/tirecalc.html

just find out what the equivalent size tire is for a 16" rim.

you probably could fit a 225/45/16


*assuming a mk2