Figure 6
Figure 7
Figure 5
Adjusting the height of an
“A-Head” stem
Due to their design, the height of
“A-Head” stems can only be
adjusted slightly. One possibility is
to replace the adjusting rings. In
most cases this only enables a
height adjustment of max. 5 mm,
since to safely secure the stem a
surface of sufficient size is
necessary on the fork tube.
A more sensible solution is to
replace the “A-head” stem.
“A-head” stems are available in
different lengths and angles, so that
everyone can find the sitting
position most suitable for them.
Stems for which the handlebars can
be replaced using a clamp, without
having to remove the grips and the
shifter offer a particularly practical
solution.
The angle of stems offered to
cross-country cyclists is usually
between 0 - 5°, their maximum
length is 135 mm; however, in
exceptional cases even longer
stems can be available. This,
however, reduces the steerability of
the bicycle, and it will tend to run in
a straight line. The shorter the
stem, the easier it is to turn the
bicycle; on the other hand, the
bicycle will be more “restless” when
ridden downhill fast.
A sportos Cross-country kerékpárosok részére elérhetők kormányszárak
általában 0 és 5 fokos szög közöttiek, maximális hosszúságuk 135 mm.
Those who take frequent bike trips usually choose a shorter stem with a
greater angle (over 10°) which allows a straight-backed riding position.
Downhill riders prefer extremely short (approx. 80 mm) and steeply
angled (approx. 30°) stems. With general use, the handlebar should be
higher than the saddle, as this affords maximum control on steep downhill
stretches, as well.
To replace the stem, undo the bolts on its top and remove the handlebar
(Figure 5). Next, undo completely the bolt of the stem cap fixer. Remove
the stem cap fixer (Figure 6), then undo the bolts on the side to remove
the stem.
Take the new stem and temporarily secure the handlebar with the clamp.
Next, place the stem onto the fork tube. Place the “A-Head” stem cap
fixer over the socket of the stem, and insert the socket bolt. Tighten the
bolt to set the tightness of the headset. If the headset has no play, and
can be easily rotated, the stem must be secured with one or two bolts.
Ensure that the stem is aligned with the front wheel when it is facing
forward. Finally, adjust the handlebar so that your hand and lower arm
are aligned, then tighten the bolts on the front of the stem.
Check that the stem is secured correctly by applying slight force to the
handlebar to try and turn it with respect to the front wheel (do not use
excessive force!).
57
1
2
3
4
5
6
7
8
ENGLISH
