General guidance on assembly and safety
Steering
The steering assembly consists of the following: handlebar, stem,
headset, grips, brake lever, shifters, and bell. Stems are available in the
most diverse shapes, diameters, and materials. The type of handlebar
we fit on our bicycles is essentially the one most suited to their
intended use.
Never replace the handlebar without asking advice from your
specialist dealer.
We can distinguish two different stem types: 1: Quill stems with
adjustable height and 2: “A-Head” threadless stems, which form part of
the headset, and are attached directly to the fork tube with two Allen
screws. With “A-head” stems, the tightness of the headset can be set
through the stem. The height of “A-Head” stems can only be adjusted
minimally, and they are used mainly on MBT-, trekking-, and nowadays
increasingly on racing bicycles. This stem type allows the rider to take
up a sporty and aerodynamic sitting position, moving the centre of
gravity onto the front axle. However, this sporty position places
increased stress on the wrists and reduces comfort.
Traditional quill stems are of adjustable height: a “STOP” mark can be
found on every quill stem, indicating the maximum height to which they
can be pulled out.
The minimum insertion depth of the stem is 65 mm.
If you are replacing the stem with a longer one, make sure that
the brake- and shift cables are of sufficient length and do not
obstruct the free movement of the handlebar; otherwise there is a risk
of accident during quick manoeuvres to avoid objects. If necessary,
replace the Bowden cables (or get them replaced) with longer ones.
Adjusting the height of a
quill stem
The height of a quill stem can be
adjusted by loosening its bolt.
Insert an appropriate tool
(at least 6 mm Allen key) into the
bolt socket and give it about three
full anticlockwise turns. If the stem
still does not move freely, loosen
it by lightly tapping it with a rubber
or plastic mallet. Set the loosened
stem to the required height.
Please take care not to pull out
the stem beyond the maximum allowed height and that the brake and
shift Bowden cables do not obstruct the free movement of the
handlebar. Align the stem with the front wheel and secure it by
tightening the bolt. 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!).
Figure 4
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ENGLISH
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