I have pzero 305/25/19s on the back, fronts are 235/35/19s


These are the wheels:
http://mhtwheels.com/wheel.cfm?cat=215

If you're asking if larger tires will fit without rubbing, it will depend very much on the width and offset of the wheels you plan on purchasing, not just the make/model of the wheels.

How did you get the C4S emblem with a red "s"? Mine is silver.

Many run 315/25/19 on widebody 996s which are just about the widest.

You may be able to go with a new 325/30-19 Michelin Sport Cup but you will need a more positive offset adjusted in the rims or spacers.

Try this first though: http://www.miata.net/garage/tirecalc.html

I got mine on the internet. Does add a little zing...

The S logo comes off with a blow dryer and some dental floss. Home Depot sells Rubber Maid "Apple Red" plastic spray paint...a perfect match. Let it dry 48 hrs and re-apply.

PM w/questions.