Handlebar Height And Angle; Control Position Adjustments - Giant Bicycles Owner's Manual

WARNING: Some people have claimed that extended riding with a
saddle which is incorrectly adjusted or which does not support your pelvic
area correctly can cause short-term or long-term injury to nerves and blood
vessels, or even impotence. If your saddle causes you pain, numbness
or other discomfort, listen to your body and stop riding until you see your
dealer about saddle adjustment or a different saddle.
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, 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
different 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, 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.
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.
WARNING: The 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.
Your dealer can also change the angle of the handlebar or bar end
extensions.
WARNING: An insufficiently tightened stem binder bolt, handlebar
binder bolt or bar end extension clamping bolt may compromise steering
action, which could cause you to lose control and fall. Place the front wheel
of the bicycle between your legs and attempt to twist the handlebar/stem
assembly. If you can twist the stem in relation to the front wheel, turn the
handlebars in relation to the stem, or turn the bar end extensions in relation
to the handlebar, the bolts are insufficiently tightened.
D. Control position adjustments
The angle of the brake and shift control levers and their position on the
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