34
a
b
c
Stems for threadless systems, the
Aheadset
®
-system
In the case of CENTURION bikes with Aheadset
®
headsets the stem also serves to adjust the bearing
preload. If you change the position of the stem you
have to readjust the bearing play (see the chapter
“The headset” and the instructions of the component
manufacturers on this CENTURION CD-ROM).
The vertical setting range is determined by the inter-
mediate rings, also referred to as spacers
(a)
. In the
case of flip-flop stem models
(b)
the stem can be
mounted the other way round to achieve a different
handlebar height.
Unscrew the bolt at the top of the fork steerer tube
(c)
which serves to adjust the initial bearing pressure,
remove the Ahead cap and release the bolts on either
side of the stem by up to three turns.
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 “The
headset”.
If you want to turn the stem around, you have to also
release the front bolts securing the handlebars
(e)
. 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.
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