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> tire size vs. speedometer, 215/45-17
post Jan 14, 2003 - 2:52 PM
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claudio



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Based on this tire/wheel calculator
http://www.miata.net/garage/tirecalc.html

what I have now is 205/55-15

215/40-17 is recommended with only 0.4% of my speedometer being too fast

I want 215/45-17 with 3.1% of my speedometer being too slow
because it will slightly increase the diameter of the overall tire in combination with Eibach sportlines (1.5" drop) I can have a smaller gap and fill my tire well a little more.

Would you go with the recommended tire size to get a slightly smaller overall tire diameter but have a more accurate speedometer or get a larger overall tire diameter and have your speedometer be 3.1% off

Will this effect my total mileage - odometer too?

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