Hi,

I was looking at the Miata.net tire calculator and trying find which size of tire would be a perfect match/upgrade for 16" to 18" without messing with speedo accuracy.

What I found was:
To get a 0% difference between the 245/70/16 and the 18", you would have to use a 325/45/18... Is this even physically possible on a VX (stock height)?

Thanks!
---JIM---