John Jorgensen wrote:
> If what you have measures 27.0mm for Japanese, English and Italian forks, you
> need a better caliper.
>
> Some older English frames will be 27.0 or beyond, things were not very standard
> way back, but if it has had a Campagnolo Nuovo Record headset fitted, then it
> is smaller than 27.0. The Campagnolo tool case has a tool to check the gauge of
> the crown race and frame, get access to one or buy a good caliper that reads
> effectively in the tenths of a millimeter or finer.
JIS crown races are 27.0mm; the race seat was milled to 27.1mm for a snug fit. Campy standard was 26.4mm, with the race seat milled to 26.5mm
--
-John Thompson (john@os2.dhs.org)
Appleton WI USA