Hmmm, reminded me of my days at Pratt & Whitney. I used diameter measuring
tapes on some applications. Not cheap though. See
http://www.newmantools.com/pi.htm for an explaination of use if your
interested. NFI, FWIW
Mike
'79B
----- Original Message -----
From: "Max Heim" <mvheim@attbi.com>
To: "MG List" <mgs@autox.team.net>
Sent: Tuesday, October 08, 2002 1:10 PM
Subject: Re: Measuring the difference between 14" and 15" wires
> The wheel diameter measurement is taken on the inner flange where the tire
> bead seats. Meaning you can't directly measure it with a tire mounted on
the
> wheel (however, in that situation all you have to do is read the diameter
> off the tire's sidewall). With no tire mounted, it still isn't something
you
> can directly hold a tape against. The easiest way is to directly measure
the
> inside depth of the outer flange, multiply that by two, and subtract it
from
> the overall diameter.
>
> For practical purposes, you will find that the flange is generally close
to
> 1/2" or 5/8". So while your B's wheel measures 15" overall, the nominal
> diameter is 14". The C has 15" wheels.
>
>
> Max Heim
> '66 MGB GHN3L76149
> If you're near Mountain View, CA,
> it's the primer red one with chrome wires
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