Originally Posted by
Charles Wahl
It seems to me that the crown race inside diameter is also somewhat critical for fitting it to a fork; likely to be 26.4 mm, but might be 27.0.
Originally Posted by
unworthy1
IIRC they sold with both race diameters (26.4 and 27.0)
I seem to recall that the "Logic" headsets were made for Ritchey by Tange, so there's a good chance that the race seat diameter is marked on the crown race itself.