tire size.

They'll fit, but you may have certain issues, for example with speedometer readings being off. I wouldn't get tires smaller than stock if I were you. Stick with 205's

Stock tires arn't 205's. I think there 185s..I have the 195-60-r15 on my 2nd gen....its ok.

yes they will fit

Spongebob what year is your car and what size engine. Different years got different size tires.

sure they'll fit, but you'd be pretty stupid to buy them, they'll give you inacurate spedometer readings

see for yourself... http://www.miata.net/garage/tirecalc.html