What's the "c" mean in tire size?

[Fred Hall]

Been looking at some tires and was wondering...I see some
listed as 700 x 23 and others listed as 700 x 23c (or 25c or
28c). My question is what difference is denoted by having
the "c" there?

[Ken]

"Fred Hall" <fhall1@twcny.rr.com> wrote in
news:rWZGc.30688$iJ4.25504@twister.nyroc.rr.com:
> Been looking at some tires and was wondering...I see some
> listed as 700 x 23 and others listed as 700 x 23c (or 25c
> or 28c). My question is what difference is denoted by
> having the "c" there?

700A, 700B, and 700C are all tire size standards. Only 700C
is used today. If you see 700 without the "C" on a modern
tire or rim, you can assume 700C.

[Fred Hall]

Thanks but I'm always seeing the "c" after the second number
(the 23, 25,
28) not the first...

"Ken" <nospam@spam.no> wrote in message
news:Xns951F97687A1D7x12@216.251.47.166...
> "Fred Hall" <fhall1@twcny.rr.com> wrote in
> news:rWZGc.30688$iJ4.25504@twister.nyroc.rr.com:
> > Been looking at some tires and was wondering...I see
> > some listed as 700
x
> > 23 and others listed as 700 x 23c (or 25c or 28c). My
> > question is what difference is denoted by having the "c"
> > there?
>
> 700A, 700B, and 700C are all tire size standards. Only
> 700C is used
today.
> If you see 700 without the "C" on a modern tire or rim,
> you can assume
700C.

[Ken]

"Fred Hall" <fhall1@twcny.rr.com> wrote in news:gz%Gc.31007$iJ4.5882
@twister.nyroc.rr.com:
> Thanks but I'm always seeing the "c" after the second
> number (the 23, 25,
> 28) not the first...

Same thing. If you see 700x25C, the C refers to the 700,
not the 25.

[Beverly]

http://www.sheldonbrown.com/tire_sizing.html

Maybe this will help

"Fred Hall" <fhall1@twcny.rr.com> wrote in message
news:rWZGc.30688$iJ4.25504@twister.nyroc.rr.com...
> Been looking at some tires and was wondering...I see some
> listed as 700 x
23
> and others listed as 700 x 23c (or 25c or 28c). My
> question is what difference is denoted by having the
> "c" there?

[Bert L.Am]

"Fred Hall" <fhall1@twcny.rr.com> schreef in bericht
news:rWZGc.30688$iJ4.25504@twister.nyroc.rr.com...
> Been looking at some tires and was wondering...I see some
> listed as 700 x
23
> and others listed as 700 x 23c (or 25c or 28c). My
> question is what difference is denoted by having the
> "c" there?
>
>

23 or 25 or 28 is the width in mm. What is the "C" for?
Don't know.

[Rick Onanian]

On Wed, 07 Jul 2004 21:28:55 GMT, "Fred Hall" <fhall1@twcny.rr.com>
wrote:
>Been looking at some tires and was wondering...I see some
>listed as 700 x 23 and others listed as 700 x 23c (or 25c
>or 28c). My question is what difference is denoted by
>having the "c" there?

C is for cookie, that's good enough for me!

Hey you know what? A round cookie with one bite out of it
Looks like a C A round donut with one bite out of it Also
looks like a C But it is not as good as a cookie Oh and the
moon sometimes looks like a C But you can't eat that, so C
is for cookie, that's good enough for me, yeah!

That's the only possible explanation.
--
Rick Onanian

[Frank Krygowski]

Ken wrote:

> "Fred Hall" <fhall1@twcny.rr.com> wrote in
> news:rWZGc.30688$iJ4.25504@twister.nyroc.rr.com:
>
>>Been looking at some tires and was wondering...I see some
>>listed as 700 x 23 and others listed as 700 x 23c (or 25c
>>or 28c). My question is what difference is denoted by
>>having the "c" there?
>
>
> 700A, 700B, and 700C are all tire size standards. Only
> 700C is used today. If you see 700 without the "C" on a
> modern tire or rim, you can assume 700C.

Ken's right. Long, long ago (in Europe) the tire and wheel
sizing was much different. 700 A, 700 B and 700 C all had
the same outside diameter of the tire. But the tires had
different widths, so the rims had different diameters. A 700
C tire wouldn't fit a 700 B rim.

Now all "700" rims have the same bead seat diameters, and if
you change to a fatter tire, your outside diameter
increases.

You can still (with difficulty) get 650 B wheels and tires.
A little less diameter, a little more width than your
typical road wheel & tire.

--
--------------------+ Frank Krygowski [To reply, remove
rodent and vegetable dot com, replace with cc.ysu dot edu]