Miata.net Tire Size Calculator

Use the calculator to see what happens to your speedometer reading when you change the size of your tires and wheels. The graphic shows your stock tire...See more » Use the calculator to see what happens to your speedometer reading when you change the size of your tires and wheels. The graphic shows your stock tire selection in an outline overlaid on your new tire selection. (Note: If you don't see the Java calculator below, make sure you have Java enabled in your browser. If it still doesn't work, you may need to upgrade or install the Sun Java Runtime Environment. Or you can try using our older version.)See less »