Jamis Bicycle Owner's Manual - page 11
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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. 6) 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 (fig. 7) 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: 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.
WARNING: Always tighten fasteners to the correct torque. Bolts that are too tight can stretch and deform. Bolts that are too
loose can move and fatigue. Either mistake can lead to a sudden failure of the bolt, causing you to lose control and fall.
Your dealer can also change the angle of the handlebar or bar end extensions.
Always tighten fasteners to the correct torque. Bolts that are too tight can stretch and deform. Bolts that are too loose can move and
fatigue. Either mistake can lead to a sudden failure of the bolt, causing you to lose control and fall.
Note: If your bicycle is equipped with a suspension seat post,
the suspension mechanism may require periodic service or maintenance.
Ask your dealer for recommended service intervals for your suspension seat post.
Small changes in saddle position can have a substantial effect on performance and comfort. To find your best saddle position, make only one
adjustment at a time.
WARNING: After any saddle adjustment, be sure that the saddle adjusting mechanism is properly seated and tightened before
riding. A loose saddle clamp or seat post clamp can cause damage to the seat post, or can cause you to lose control and fall. A
correctly tightened saddle adjusting mechanism will allow no saddle movement in any direction. Periodically check to make sure that
the saddle adjusting mechanism is properly tightened.
If, in spite of carefully adjusting the saddle height, tilt and fore-and-aft position, your saddle is still uncomfortable, you may need a different
saddle design. Saddles, like people, come in many different shapes, sizes and resilience. Your dealer can help you select a saddle which, when
correctly adjusted for your body and riding style, will be comfortable.
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.