"Russ" <[email protected]> wrote in message news:[email protected]...
> Can someone help me out please on tyre dimensions. What does 700c mean?
>
> Easy question...but thanks all the same
>
> --
> Russell
>
>
"The number refers to the approximate outside diameter of the tire, in millimeters. The "C"
indicates that it has an inside (or bead-seat) diameter of 622mm."
Guy
===
** WARNING ** This posting may contain traces of irony. http://www.chapmancentral.com (BT ADSL and
dynamic DNS permitting)
NOTE: BT Openworld have now blocked port 25 (without notice), so old mail addresses may no longer
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Russ wrote:
> Can someone help me out please on tyre dimensions. What does 700c mean?
>
> Easy question...
...but not such an easy answer. It's a long story, but it means that the rim diameter is the same as
for the old imperial measurement 28" x 1-3/4" tyre. When the French designated their own tyre sizes,
they used a nominal conversoion rate of 25mm = 1 inch. So the 700 means 700 pseudo-milimetres and
isn't a real measurement at all.
> Not heard that one before. What does it mean, from whence does it come?
No idea - I suspect it is an archaic RAF thing, as my Dad used to say it. He was stationed at
Scampton when they still had Lancasters.
--
Guy
===
I wonder if you wouldn't mind piecing out our imperfections with your thoughts; and while you're
about it perhaps you could think when we talk of bicycles, that you see them printing their proud
wheels i' the receiving earth; thanks awfully.