39
Unscrew the preload bolt at the top of the fork steerer tube, remove the
cap and release the bolts on either side of the stem by up to three turns
(a)
. Remove the stem and spacers from the fork steerer tube. In doing
so keep hold of both frame and fork to prevent the fork from slipping
off the head tube.
You can determine the handlebar height by the arrangement of stem and
spacers. Slip the remaining spacers onto the fork steerer tube above
the stem. Adjust the headset, as described in the chapter
“headset”
.
If you want to turn the stem around, you have to also release the bolts
of the faceplate securing the handlebars
(b)
. If the stem is fitted with
a cap, you can simply take out the handlebars at this point. If it is not
fitted with a cap, you have to remove the handlebar fittings.
Mount the handlebars and, if necessary, the handlebar fittings, as de-
scribed in the chapter
“adjusting the tilt of the handlebars, bar
ends and brake levers”
and/or in the operating instructions of the
parts manufacturers, which you can find on the enclosed CD.
Check whether the handlebars are firmly seated in the stem by trying
to rotate the handlebars downwards
(c)
. Verify whether the handlebar/
stem unit can be twisted relative to the fork. Do this by taking the front
wheel between your knees and trying to twist the handlebars. If there
is movement, carefully tighten the bolts a little more and check again
the proper fit.
Tighten carefully by approaching the prescribed maximum torque in
small steps (0.5 Nm increments) and check in between the proper fit
of the component. Never exceed the maximum torque value indicated
by the manufacturer!
G
These routines require a certain amount of manual skill and
(special) tools and are best left to your WHEELER bicycle
dealer. If you still wish to do this by yourself, carefully read
through beforehand the instructions of the stem manufac-
turer, which you can find on the enclosed CD.
G
In the case of turned stems, it is possible that the cables
are too short. In this case riding can be unsafe. Ask your
WHEELER bicycle dealer for help.
G
When removing spacers the fork steerer tube must be
shortened. This change is irreversible and in any case best
carried out by your WHEELER bicycle dealer, but only after
you have found your preferred position.
G
Stems come in varying lengths
(d)
as well as different shaft
and binder tube diameters
(e)
. A stem of inappropriate di-
mensions can become a source of danger: Handlebars and
stems can break and thus cause an accident!
I
If you want your handlebar in a higher position, you may opt
for a riser bar model which has an upward bend. Ask your
WHEELER bicycle dealer for advice.
ADjUSTING THE TILT oF THE HANDLEBARS, BAR ENDS AND
BRAKE LEVERS
The handlebars of mountain bikes are usually slightly bent at the ends.
Set the handlebars to a position in which your wrists are relaxed and not
turned too much outwards.
To adjust the angle of the handlebars, release the Allen bolt(s) on the
underside or front side of the stem. Turn the handlebars to the desired
position. Make sure the handlebars are accurately centred in the stem
(f)
. Now carefully retighten the bolt(s) with a torque wrench
(g)
.
Try rotating the handlebars once clamped in the stem and tighten the
bolt a little more, if necessary. Use a torque wrench and never exceed
the maximum torque values! You can find these in the chapter
“re-
commended torque Settings for components”
, on the components
themselves and/or in the instructions from the parts manufacturers,
which you can find on the enclosed CD.
After adjusting the handlebars you need to adjust the brake and shift
lever mounts.
Release the Allen bolt at either mount. Turn the levers relative to the
handlebars. Sit in the saddle and place your fingers on the brake levers
(h)
. Check whether the back of your hand forms a straight line with the
line of your forearm. Retighten the mounts with a torque wrench and
do a twist test!
a
b
c
d
38
e
f
g
h
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