Touring - Early 1990s Shimano group

[ccollins]

I'm trying to follow this by testing my current gearing.

Originally posted by Gwhite

> So let's arbitrarily test the result for the
> 48-44 combo:

> 44 48 11 106.000 115.636 13 89.692
> 97.846 15 77.733 84.800
> 18 64.778 70.667 21 55.524 60.571 24
> 48.583 53.000 28 41.643 45.429

Aren't these gear inch results for a 47-43 front chainring combo?

--Chris

 

[Gwhite]

ccollins <[email protected]> wrote in message news:<[email protected]>...
> I'm trying to follow this by testing my current gearing.
>
> Originally posted by Gwhite
>
> > So let's arbitrarily test the result for the 48-44
> > combo:
>
> > 44 48 11 106.000 115.636 13 89.692
> > 97.846 15 77.733 84.800 18 64.778 70.667 21 55.524
> > 60.571 24
> > 48.583 53.000 28 41.643 45.429
>
> Aren't these gear inch results for a 47-43 front
> chainring combo?

Don't worry about absolute precision. It is the ratio
that counts.

Wheel size for the computation was 26.5 inches. (About a
700x23-25c tire)