Look here and set a 16" rim diameter with stock TII tires (which is 205/55R16). 24.9" tall. There will be some minor variance in the height for the same size on the same wheel according to model/brand/wear on tires, but much less than an inch either way I'm sure.
http://www.rims-n-tires.com/rt_specs.jsp
Also, how wide are your 18" wheels? Maybe you should post pics of your car.
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He isn't a killer. He just wins --
thoroughly.

'87 TII
240+ rwhp on my DIY streetport, ~13psi on stock turbo, Racing Beat REVTII exhaust

rTek 2.1 awaits a tune
Quote:
Originally Posted by need RX7
This is why I don't do politics, it's just one stupid thing after another.
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360 gamertag: quick Tii