(Qui si parla Campagnolo) wrote:

snip
BUT there is
a maximum number of spacers you can put under the stem on a carbon steerer. For
1 inch it is generally about 1 inch(2.54cm). With the other two, steel and
aluminum, no maximum. You need just about any threadless 1 inch HS.

Why the maximum? What's the limiit on a 1 1/8" steerer? Is this a
loose rule-of-thumb or a hard restriction printed on paper by the
manufacturer? (i.e. rumor or fact) Wouldn't it differ between
manufacturors? What happens if you exceed it? Have I asked enough
questions?

I recently purchased a bike with a 1 1/8" carbon/carbon fork. It was
initially fitted wth about 3" of spacers between the headset and stem,
indicating that the LBS didn't think/know that that was a problem.
I've subsequently reduced it to 40mm, IIRC.

Michael