68
Retighten the expander bolt with a torque wrench. Tighten carefully by
approaching the prescribed maximum torque in small steps (0.5 Nm
increments) whilst constantly checking the proper t of the component.
Never exceed the maximum tightening torque indicated by the manufac-
turer!
Make sure the stem is rmly xed by taking the front wheel between
your legs and trying to turn the handlebars and stem relative to the
wheel (a). 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 ttings on the handlebars. Inform yourself at a bicycle specialist shop
of your trust about the various stem types available.
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,
handlebars and stem may break and result in an accident.
11.2.3 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
headset 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 (b). In the case of ip-op 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 a bicycle specialist shop of your
trust!
11.2.4 Adjusting Adjustable Handlebar Systems (A.H.S.).
Check whether the clamping area (c) of the A.H.S. is accurately centred
in the handlebar clamp of the stem.
Adjust the A.H.S. tilt to your personal needs.
Tighten the handlebar clamping bolt(s) at the stem to the tightening
torques prescribed by the stem manufacturer (d).
b
c
da
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