I don't know how accurate your 21.9 measurement is, but that is very close to the nominal 22.0 French stem diameter. Seems odd you would find that on a Hetchins, but one never knows. Anyone know if smaller steerer ID's were common on British bikes in the 50's? Perhaps some of the old steel stems had a smaller diameter. I'd try a French stem, or a 22.0 Cinelli, which were made for French bikes. But you can easily sand down a 22.2 Cinelli, although as you say, it doesn't do the finish any good.
Regards,
Jerry Moos Houston, Tx
charles nighbor <cnighbor@pacbell.net> wrote: On my 1958 Hetchins I have a steerer tube dia. and stem dia.compatibility. The steerer tube inside dimension measures 21.9mm and a Cinelli 70's stem is a 22.2 mm. So what is avaivable that looks great. I could prehaps cut down the Cinelli to fit not dong the finish any good. Help I like to get the Hetchins together soon. I tried a search on CR Main but it doesn't work on my computer. Not a good idea to ream out steerer tube. Charles Nighbor