VVTLI2000

Probably like 215 or 205/40/18. 35 is low profile and I think 45 would be too thick.

It should fit fine. I had 18s but I forgot the tire size on them but it should be one of the ones I listed, which arent' really different from each other. If you want to be completely sure though you can just punch in the stock tire size and the sizes I told you into this website and it'll tell you if it matches or is different from the stock size by how many percentage. If it's off by 5% or less I'd say it's negligible and you're okay running that tire size. www.miata.net/garage/tirecalc.html