Largest size tire

What is the largest sized tire that will fit the 2G EX wheels? IIRC, 215/65 is stock, so 235/60 would be about the same side wall, but a bit more meat on the road. There is a tire size calculator on www.miata.net that shows how much the speedo will be off and other valuble figures, which is nice.

Any experiences?

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David Coleman
1993 Mazda MX-3 GS Special Edition
1/4 mile [stock]:16.05 @ 85.7
Parents got an oddy...just reserchin mo powa...