C
Chris Malcolm
Guest
"Simon D" <[email protected]> writes:
>CatEye computers always used to ask for the
>*circumference*. If you're using tyres which are *actually*
>700x23, then this will be 210cm (pi x diameter =
>pi[62.2+[2x2.3]]). Tyre sizes are often pretty nominal,
>though - I'd measure them, which is very simple - just roll
>the bike along a tape measure laid out on the ground,
>measuring one wheel revolution from valve to valve, if you
>see what I mean.
While tyre is inflated and weighted by you to the normal
riding extent.
--
Chris Malcolm [email protected] +44 (0)131 651 3445 DoD #205
IPAB, Informatics, JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK
[http://www.dai.ed.ac.uk/homes/cam/]
>CatEye computers always used to ask for the
>*circumference*. If you're using tyres which are *actually*
>700x23, then this will be 210cm (pi x diameter =
>pi[62.2+[2x2.3]]). Tyre sizes are often pretty nominal,
>though - I'd measure them, which is very simple - just roll
>the bike along a tape measure laid out on the ground,
>measuring one wheel revolution from valve to valve, if you
>see what I mean.
While tyre is inflated and weighted by you to the normal
riding extent.
--
Chris Malcolm [email protected] +44 (0)131 651 3445 DoD #205
IPAB, Informatics, JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK
[http://www.dai.ed.ac.uk/homes/cam/]
