Re: wtf chain ring bolts

AMuzi <am@yellowjersey.org> wrote:

 
As an aside, tubulars, the oldest standard which size has
not changed since the 1890s, are variously labeled "700C"
(they are not; the 700 type C was developed later to
exchange wheels with the same brake height as a tubular) or
"27 inch" (they are not; 27 inch systems are larger) or "28
inch" (again, 28s are all much larger) even down to today by
various tubular makers in some weird vestigial rite.  The
net effect is confusion to riders and is not at all helpful.

As a matter of curiosity, what is that standard size called,
and how is it measured?

Thanks for writing,

bob prohaska