Re: Speedometer off?--spider tires/wheels

[Ryan Fellini <rfellini@domain.elided>]

> One thing you don't want to forget about tire sizing is that the aspect RATIO
> is the percentage of the tread width. 60 series tire side wall is 60% of the
> tread width. 70 is 70% , and so on. For instance, a 175 / 60 / 15  (105 mm
> side wall) would be shorter than a 225 / 50 / 15 (112.5 mm side wall)  With
> the tire size calculator you can use different tread widths and aspect ratios
> to come to the right height.  Hope this helps you to find exactly what you
> need.
> Tim Timko
> 88 Milano Platinum
> 82 Lancia Zagato
> 72 BMW Bavaria

I'm sure this has been posted before, but to do these
computations there is a nice little piece of HTML at,

http://www.miata.net/garage/tirecalc.html

Ryan
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