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ENGLISHENGLISH TREKKING AND TREKKING‑PEDELEC | ORIGINAL OPERATING INSTRUCTIONSORIGINAL OPERATING INSTRUCTIONS | TREKKING AND TREKKING‑PEDELEC
b ca e fd
CAUTION!
A
If you want to adjust conventional headsets you will need special tools. If, never-
theless, you want to try it by yourself, read the manual of the headset manufacturer.
THREADLESS HEADSET – AHEADSET®
The distinct feature of this system is that the stem does not sit within the fork steerer
tube, but rather slips over the fork steerer tube, which in this case is threadless.
The stem is thus an important part of the headset, as the stem clamping fixes 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 countersunk adjusting bolt on top a little (d), e.g. by a quarter turn,
by using an Allen key.
Realign the stem to ensure that the handlebars are at right angle to the wheel. Make
sure the front wheel is in line with the top tube and the stem (e). Tighten the clamping
bolts of the stem (f). Use a torque wrench and never exceed the maximum torque
values! You will find the prescribed values in the chapter “Recommended torque
settings for your BERGAMONT bike”, directly on the components and/or in the
manuals of the component manufacturer.
Check the headset for play as described above. Do not overtighten the headset. Risk
of headset failure!.
DANGER!
G
Bear in mind that by overtightening the bolts the stem can crush the steerer tube.
In particular forks with carbon steerer tubes are highly sensitive to overtightening
the steerer tube clamping at the stem. Risk of breakage! Make sure the clamping
area is absolutely free of grease when any of the clamping faces is made of carbon.
If necessary, use carbon assembly paste in the clamping areas to ensure maximum
clamping.
Checking and readjusting
Check the headset for play by placing your fingers around the upper head tube race.
Bring your weight to bear on the saddle, pull the front brakes with your other hand
and push the BERGAMONT bike firmly back and forth with the wheel remaining on
the ground (a). If the bearing has play, you will feel the upper head tube race moving
in jerks relative to the lower head tube race - visible as a small gap in between the
head tube races.
To check the bearing for ease of running, lift the frame until the front wheel is
suspended in the air (b). 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 BERGAMONT dealer.
DANGER!
G
Adjusting the headset requires a certain amount of experience and should
therefore be left to your BERGAMONT dealer.
CONVENTIONAL HEADSETS
The adjustment tolerance between there being play in the bearings and them
being set too tight is very small. The bearing can easily be damaged. If you want
to try it nevertheless, you need two large and flat open-end wrenches (c). Ask your
BERGAMONT dealer for advice.
Release the top lock nut and turn the head cup below clockwise without tightening it.
Fix the lower head cup and retighten the lock nut.
CAUTION!
A
A too tight adjustment can destroy the bearings and affect the riding character-
istics.
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