'c'

[mig]

as in 700c.

for what does it stand?

[531colin]

See Sheldon Brown on French tyre sizing...http://sheldonbrown.com/tire-sizing.html.....scroll down

In the series 700A, 700B, 700C.....the overall tyre (nominal) diameter was originally supposed to be 700mm, so the smallest tyre, 700A, has the biggest bead diameter, 642mm......700C, which was originally a fat tyre size, has 622mm bead diameter.........but now that 700c tyres come in sizes down to 18mm, I wonder why we bother with "C" at all!!

[anniesboy]

This in Wikipedia
For rims the ISO designation lists the rim diameter (where the tire sits) and the rim's inner width, both in millimeters and separated by a cross, along with a letter code for the rim type (e.g., "C" = Crochet-type): 622x19C

[meic]

See CJs post on this thread.

viewtopic.php?f=5&t=34426&hilit=700C&start=15

[Brucey]

This in Wikipedia...

aye, and there's the source of the trouble....

cheers

[julianm]

The speed of light!

[mig]

so no real meaning anymore and common sense not to use it?

i wonder how many more cycling related things would be common sense to do whereas manufacturers keep on doing them...........

[Brucey]

so no real meaning anymore and common sense not to use it?

hmm, not sure about that. You could have a 700x40 tyre that is actually 700B not 700C, and you would have to use the ETRTO/ISO designation to be sure.

700B tyres are not that common but they are still fitted to new bicycles to this day.

cheers

[hufty]

And a quick mention of the 650B wheel for mountain bikes. 29-ers are so last year.

[mig]

this forum is so interesting - always having people with knowledge and willing to contribute it. always a worthwhile read.

so - what's the best way to clean a chain again?

[meic]

That one is easy to answer.

http://sheldonbrown.com/chainclean.html

[dougie]

That one is easy to answer.

http://sheldonbrown.com/chainclean.html

Speechless.

[karlt]

That one is easy to answer.

http://sheldonbrown.com/chainclean.html

Speechless.

One of the best cycle related April Fools for some time, that.

[Brucey]

The speed of light!

in which case '700C' could be expressed 700(E/m)^(1/2)

it couldn't be any less confusing than current tyre markings, could it?

cheers