The 205/50r 15 tires according to tire rack will fit on rims sized from 5.5 to 7 inches. It would appear that they will fit on the stock wheel. When shopping for new wheels- pay attention to weight! A heavy rim will slow the cars acceleration rate!

Mark is correct. 195/50-15 is the proper sized tire for you Miata, on 15x7 rims.

195/50R15 is the correct tire size, not 205/50R15

15x7

And I want to put new wheels and tires on it, I found a set of tires for it that are 205/50r15 and I'm wondering what size wheels would be most recommended to use, help would be appreciated, thanks!