Re: wtf chain ring bolts

On 3/6/2025 10:54 AM, bp@www.zefox.net wrote:

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
 

"tubulars".*
They predate numerical designations but originally were called 28 inch as they were a lot fatter then. Actual rim diameter is 630mm.
And now, we return to fat tubulars for 'gravel' and cyclo cross. The ever popular 23mm tubulars are about 26-1/2 inches edge to edge. Newer fat tubulars are about 27-1/2 inches on that rim.
*there are/were 26" tubulars for TT and track, 24" for children's bikes and 22", 20" for wheelchairs. All are and were specialties/oddities with no significant volume.
https://howirollsports.com/shop/panaracer-rapide-20-inch/
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971