Now you can move the handlebar/stem unit up and down as a whole. Be
sure not to pull out the stem too far. The mark on the stem (max., min.,
max., stop, limit or the like) should always remain within the tube (a). Setting
the stem to a lower position can only add to your safety!
Straighten the handlebars so that they are symmetrical with respect to the
front wheel (b).
Retighten the expander bolt with a torque wrench. Tighten carefully by ap-
proaching the prescribed maximum torque in small steps (0.5 Nm incre-
ments) whilst constantly checking the proper fit of the component. Never
exceed the maximum tightening torque indicated by the manufacturer!
Make sure the stem is firmly fixed by taking the front wheel between your
legs and trying to turn the handlebars and stem relative to the wheel (c). If
there is movement, please increase the tightening torque.
If the handlebars are still too high or too low, you can replace the stem. This
can be quite a big job, as it may mean taking off and remounting all the
fittings on the handlebars. Inform yourself at your bicycle dealer about the
various stem types available. Let the bicycle dealer advise you about the dif-
ferent types of stems and have the stem mounted in the shop.
Never ride a bicycle with a stem drawn out beyond the mark for
the maximum permissible height! Check all bolted connections
and do a brake test before you set off!
Stems come in most different lengths and shaft and binder tube
diameters. If you opt for a stem of inappropriate sizing, handle-
bars and stem may break and result in an accident.
14.2.3 Stems for Threadless Systems, the Aheadset
®
-System
(*Aheadset
®
is a registered trade mark of Dia-Compe)
On bicycles with Aheadset
®
the stem also serves to adjust the initial head-
set bearing pressure. If you change the position of the stem you have to
readjust the bearings (see chapter “Headset”). The vertical setting range is
determined by the intermediate rings, also referred to as spacers (d). In the
case of flip-flop stem models the stem can be mounted the other way round
to achieve a different handlebar height.
This adjustment is a job best left to your bicycle dealer!
a
b
c
d
the handlebar clamp of the stem.
Adjust the A.H.S. tilt to your personal needs.
Bring the A.H.S. grips into a position that matches your personal needs. To
do so release the clamping bolts at the joint.
Adjust the shift/brake levers and grips on the handlebars to your wishes.
Slide the expander cones of the bar ends onto the outer ends of the A.H.S.
Position the bar ends to your personal needs.
Do not forget to insert the according plugs into the ends of the A.H.S. (d).
