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WARNING: A quill stem’s Minimum Insertion Mark must not be visible
above the top of the headset. If the stem is extended beyond the Minimum
Insertion Mark the stem may break or damage the fork’s steerer tube, which
could cause you to lose control and fall.
WARNING: On some bicycles, changing the stem or stem height can
affect the tension of the front brake cable, locking the front brake or creating
excess cable slack which can make the front brake inoperable. If the front brake
pads move in towards the wheel rim or out away from the wheel rim when the
stem or stem height is changed, the brakes must be correctly adjusted before
you ride the bicycle.
Some bicycles are equipped with an adjustable angle stem. If your bicycle has an
adjustable angle stem, ask your dealer to show you how to adjust if. Do not attempt to make the
adjustment yourself, as changing stem angle may also require adjustments to the
bicycle’s controls.
C. Handlebar height and angle
Your bike is equipped either with a “threadless” stem,
which clamps on to the outside of the steerer tube, or with
a “quill” stem, which clamps inside the steerer tube by way
of an expanding binder bolt. If you aren’t absolutely sure
which type of stem your bike has, ask your dealer.
If your bike has a “threadless” stem (fig. 5) your dealer
may be able to change handlebar height by moving height
adjustment spacers from below the stem to above the
stem, or vice versa. Otherwise, you’ll have to get a stem of
dierent length or rise. Consult your dealer. Do not attempt
to do this yourself, as it requires special knowledge.
If your bike has a “quill” stem (fig. 6) you can ask your
dealer to adjust the handlebar height a bit by adjusting
stem height.
A quill stem has an etched or stamped mark on its shaft
which designates the stem’s “Minimum Insertion” or
“Maximum Extension”. This mark must not be visible above
the headset.
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