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To check the bearing for ease of running,
lift the frame until the front wheel is
suspended in the air. The handlebars should
turn from far left to far right without feeling
roughness or tightness at any point. With a
gentle tap on the handlebars the fork should
turn easily from the middle position.
If you face any problems during the test,
contact your bicycle mechanic.
Adjusting the headset requires a certain
amount of experience and should therefore
be left to your bicycle mechanic.
THREADLESS HEADSETS
—
- AHEADSET®
This headset system is characterized by the fact
that the stem is not in the fork steerer tube but
clamps it from outside. Hence the stem is an
important constituent part of the headset,
clamping it therefore also sets the adjustment.
You generally only need one or two Allen keys
and a torque wrench to adjust an Aheadset®.
Release the clamping bolt(s) located on the
side of the stem by one to two turns. Gently
tighten the counter sunk adjusting bolt on top
a little, e.g., by a quarter turn, by using an Allen
key.
Align the stem so that the handlebars are not
slanted. Make sure the front wheel is in line
with the top tube and the stem. Tighten up the
stem clamping screws. Use a torque wrench
and never exceed the maximum torque values!
You will find the prescribed values, directly on
the components and/or in the operating
instructions of the component manufacturers
on their respective websites.
Check the headset for play as described above.
Take care not to tighten the bearing too
much, as this could easily destroy it. Bear in
mind that by overtightening the bolts the stem
can crush the steerer tube.
Check the secure seat of the stem by taking
the front wheel between your legs and trying
to turn the handlebars and stem relative to the
wheel. A loose stem can cause bad accidents.
Never change the preloading mechanism
in the inside of the fork steerer tube.
There can be several reasons why the
bearings cannot be adjusted. If you are not
absolutely sure, ask your bicycle mechanic for
help.
Do not overtighten the upper bolt, it only
serves to adjust the headset play.
SUSPENSION
GLOSSARY:
SUSPENSION FORK
Bicycle forks absorb and dampen shocks
through moving components. The most
common among these forks are the telescopic
suspension forks. What is designated as
stanchion tubes are the thinner tubes press
Summary of Contents for UB200
Page 1: ...E BIKE MANUAL ...
Page 3: ...Page 2 of 64 ...
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