Quote:
Originally Posted by clarka@csolve.net
I have found a used set of rims and tires that might work. The size is 245/40/R18. Do you think this size would work as well as the 245/50/R18? I'm not sure what the middle number refers to.
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With the 40 series instead of the 50s your speedometer would be 3.6% faster than actual.
Check out this link.
http://www.miata.net/garage/tirecalc.html