[Java Junky]

I may've stolen this from Halo, Matt G., Go r' even another site, but, lets see if the Neanderthal can copy n' paste:
Based on successes and failures from many S2000 owners, we can use an offset calculator to figure out what other offsets and tires will work. These are minimum recommended offsets. You can use a higher offset if you want, and you will get additional fender clearance.

For the front:
6.5” to 7.5” wide wheel: 205 tires: +43 offset minimum
7.0” to 8.0” wide wheel: 215 tires: +48 offset minimum
7.0” to 8.0” wide wheel: 225 tires: +53 offset minimum
7.5” to 8.5” wide wheel: 235 tires: +58 offset minimum
7.5” to 8.5” wide wheel: 245 tires: +63 offset minimum

For the rear:
7.5” to 8.5” wide wheel: 235 tires: +40 offset minimum
7.5” to 9.0” wide wheel: 245 tires: +45 offset minimum
8.0” to 9.5” wide wheel: 255 tires: +50 offset minimum
8.5” to 9.5” wide wheel: 265 tires: +55 offset minimum
9.0” to 10.0” wide wheel: 275 tires: +60 offset minimum
9.0” to 10.0” wide wheel: 285 tires: +65 offset minimum

The offsets above will all set the outside edge of the tire to the same place relative to the outer fender, rounding to the nearest millimeter.
If we don't already godditt somewhere, I'm gonna see if we can't post it permanently on the site somewhere.
Be well.
Java