QUOTE(jtornado2 @ Mar 1 2006, 10:02 AM)
so what your saying is the 215/40/17 dont really matter its just what i like
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215 - Section Width (in millimeters)
40 - Sidewall aspect ratio (the sidewall height is 40% of the section width)
17 - Rim (diameter in inches)
The numbers do not relate to performance. Your vehicle has a stock tire and rim size. When you change the rim size you need to use a tire that matches (not exactly, but close) original tire diameter.
Basically, if your factory tire was 215/40/17, that means that your tire diameter is about 24 inches (or 603.8 millimeters).
215(.4) = 86 mm = 3.39 in = sidewall height (rim to tread)
tire diameter = 3.36(2) + 17 =
23.77 inYou can get a wider tire than stock, but you need to maintain the tire diameter. If you don't maintain the original tire diameter your speedometer will be off.
Check out.
http://www.tirerack.com/tires/tiretech/tec...e.jsp?techid=33Then.
http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=7Also, if these rims and tires are for a 93 Eclipse GS, then you should be using 215/45/17 tires, not 215/
40/17 tires.
Hope that helps.