Re: tire sizes

[Ken Ames <amesk@xxxxxxxxxxxxxxxxxxxxxx>]

I have one much the same. I also incorporate a 96% factor for revs per mile as 
compared to the mathematical circumference. This seemed to be about the 
average when I compared the math to the real revs per mile as shown in various 
tire pamphlets. 

Ken Ames

Quoting Tom Jennings <tomj@xxxxxxx>:

> 
> > is there a source on line that mandates the official size for each tire 
> > size?
> > that would be handy to have... I thought it varied a bit from mfr to
> > mfr...
> 
> No, in fact you can CALCULATE the size of the tire from the metric tire
> size on the side of it... I have a spreadsheet that does it, but there
> are also websites that do it.
> 
> Try searching for "tire size calculator" or look at powerdog.com I
> think.
> 
> My spreadsheet is at:
> 
> http://wps.com/AMC/axle-ratio-tire-MPH.xls
> 
> (It does tire size, axle ratio, engine rpm, mph in each gear, engine
> cfm, etc)
> 
> 
> 
> 
> 


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