Operating instructions

Mounting AX-Lightness
and engage handlebars
Apply AX-Lightness carbon assembly paste in the
area of the clamping (a+b) on the AX-Lightness and
engage handlebars as well as on the stem.
Position the stem clamp in the middle of your new
AX-Lightness and engage handlebars (c) so that the
handlebars extend the same distance from the stem
on each side. If the handlebars do not slide easily
into the stem clamp or if there is play between the
two components, ask your AX-Lightness and engage
dealer whether both components are compatible.
Mountain bike handlebars are normally mounted
with the sweep supporting a natural ergonomic
hand position, i.e. bent slightly rearward. The handle-
bar position is correct when your wrists are relaxed
and your elbows not ared out too much.
In the case of road racing bicycles the straight piece
of the drops should be in parallel to the ground or
point with the ends slightly downwards.
Tighten the greased bolts of the stem faceplate with
your ngers by a few turns (d). Do not apply grease
on the clamping surfaces. Tighten the bolts of the AX-
Lightness handlebars with a 3 mm Allen key and the
bolts of the engage handlebars with a 4 mm Allen
key until the clamping slots are identical in width on
all sides.
If you have a four-bolt stem, the upper and lower
clamping slots must be identical in width and parallel
in addition (e).
Finish by checking the position of the handlebars.
Tighten the xing bolts evenly in a cross pattern, i.e.
alternately and in small increments to the minimum
limit of the recommended torque values by using a
high-quality torque wrench with a 3 mm hexagon
bit socket in the case of AX-Lightness handlebars
(f)
and a 4 mm hexagon bit socket in the case of engage
handlebars
(g). If you have a four-bolt stem, tighten
the bolts in a cross pattern.
The recommended maximum torque value for the
AX-Lightness Zeus stem is 3-4 Nm. Always use a
high-quality torque wrench and observe the torque
value indicated on the component in case of doubt.
Check the brake lever/shifter or the brake grips for
burrs and sharp edges
(h). Do not use shifters or brake
levers with burrs or sharp edges to prevent your
AX-Lightness and engage handlebars from damage
or notches.
Components that are aected by burrs or sharp edg-
es should be checked by your AX-Lightness and en-
gage dealer. They will see, whether this is a problem
that can be solved or whether the component has to
be replaced.
Loosen clamping bolts completely to ensure clamps
are open all the way before sliding the shifters and
brake levers onto the handlebars. In the case of some
mountain bike brake grips a part of the clamp can be
folded upwards or removed.
90 91
Handlebars - Stem
a
b
c
d h
g
f
e