Bleve wrote:
Marty wrote:

Peter Signorini wrote:

"Resound" wrote in message
...


"Moriarty" wrote in message
news

If you'll pardon the question, I'd like to know what the difference is
between a 700c wheel and a 26 inch wheel.
Does 700c mean 700 cm?


The "c" stands for "clincher", that is, not for tubular tyres.


What I don't understand is why don't the manufacturers tell us what it
means instead of leaving it up to people like Sheldon to do it for them?
Why do we have to guess? The makers ought to just tell us so we can make
informed decisions.



What informed choice do you need to make? You buy tyres from your
LBS, they can (should) advise you as to what fits. Do you
really care that 700c wheels have a bead diameter of 622mm? The
tyre will have 622 on it (x whatever width it is). Do you
want each tyre to come with a pamphlet explaining all the sizes?
Car tyres don't, so why would bike tyres?


Do you think every town has a LBS? Or even one that is conversant about
tyres?
And what if I see a 700B tyre? What's the difference between a C and a
B? Is the B going to be suitable for my rim? And what does the 700 refer
to anyway? If you measure your rim it's nothing like 700mm. Does it
convert to inches somehow? If I'm swapping my singles wheel with my
clincher wheel how much effect will it have on my speedo?
How the hell do I know if the manufacturers won't tell me!
For a while Velocity were making wrong sized rims and insisting the tyre
manufacturers were making bad tyres. How do we work out who's right?
I just bought a Continental ultra sport that has 700 by 23C written on
it, is that the same as a 700c? Will it have the same diameter as 700 by
25? If the outside diameter is different then why do they call it 700?
These are things I like to know.

Marty