Re: [St] More on Sprocket set up

[Neil Lindsey <Neil.Lindsey@xxxxxxx>]

like I said in an earlier post John, the concept is right, but your
explanation is incorrect

if a 43 rear/18 front combination gives a ratio of 43/18=2.39, the question
is how many teeth on the rear sprocket would be required to achieve the SAME
ratio with the original, 19-tooth front sprocket

the answer is  x/19=43/18, where x=(19)(43/18)=45.39

the point here is that the ORIGINAL sprocket ratio (assumed to be 43/19)
does not enter into the calculation at all

----- Original Message -----
From: "John Ulizzi" <jaulizzi@xxxxxxxxxxxxx>
To: <ST@xxxxxxxxxxxxxx>
Sent: Friday, May 09, 2008 12:33 PM
Subject: Re: [St] More on Sprocket set up


> Stock gearing is 19/43 ( in some cases 18/43). The
> ratios are:
>
> 43/19 = 2.26
> 43/18 = 2.38
>
> Going down one tooth on the front is equal to going up
> 2 1/3 teeth on the back. Of course with chain links,
> your options are whole numbers...
>
> John
>
>
> --- JES_VFR <jes_vfr@xxxxxxxxxxx> wrote:
>
> > At 08:32 AM 5/9/2008, you wrote:
> >
> > >One tooth on the front is equal to two teeth on the
> > rear.
> > >
> > >Brett.
> >
> > actually its more like three teeth.
> >
> >
> >
> > JohnS
> > A Dragon Ascending
> > "Forging my body in the Fires of my Will"
> >
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