Operating instructions
The outer surface of the sleeve must remain free of
grease. Apply AX-Lightness carbon assembly paste in
this area, as well, before tightening the mechanism in
the fork steerer.
I
AX-Lightness forks in combination with
AX-Lightness stems can also be used with-
out expander. Dismount in this case the ex-
pander after having adjusted the headset.
The maximum torque value of the stem
bolts is 4 Nm.
g
Never use a star nut (a) as counterbearing
inside the fork steerer! Risk of breakage!
g
If you replace a headset of an already used
fork, check the steerer tube and the dis-
mounted headset carefully for scratches,
abrasion marks and notches. Notches in the
contact area indicate defective processing
or decient design of the headset in these
areas.
Mounting forks with threadless
carbon steerer
The cutting of the steerer tube, the press tting of the
crown race and the installation of the fork into the
frame are jobs for a mechanic. Have this work solely
done by an AX-Lightness and engage dealer. An un-
authorized installation and maintenance will render
the warranty void.
Improper installation increases the risk of breakage
for the AX-Lightness and engage fork and stem. Risk
of accident!
Be sure to strictly observe each of the following in-
structions. Non-observance of these instructions can
result in a failure of the AX-Lightness and engage fork
and lead to a fall with serious consequences.
Measure the crown race
(b) and the fork crown (c)
rst. Forks with 1 1/8”- steerer tubes (steerer tube
diameter 28.6 mm) require crown races at a nominal
diameter of 30.0 mm.
Make sure the diameter is not 0.1 or 0.2 mm bigger
than the inner diameter of the crown race.
Make sure the contact surfaces of the fork crown and
the crown race are clean.
Some manufacturers provide their fork crown races
with a slit that allows an easy installation on the fork
steerer.
If this is not the case, hit the crown race with an ap-
propriate special tool
(d) until it is in full contact with
the fork crown and until any gap between crown
race and fork crown has disappeared. Keep the AX-
Lightness and engage fork in hand during hitting and
do not put it down. Risk of breakage!
If there is hardly any resistance when sliding on the
crown race
(e) due to an improper t, apply some
two-component epoxy adhesive to x it additionally.
Stop as soon as you feel a very high resistance when
sliding on the crown race and re-dismount it. Apply
some grease on the fork crown (f) and try again.
Do not apply grease or oil on the steerer tube in the
clamping area of the stem, as this will prevent a reli-
able clamping!
Assemble all parts of the headset, insert the desired
number of spacers under the stem and mark the top
edge of the stem, e.g. with a touch-up pencil
(g).
If you have not yet found your preferred position of
the stem, insert more spacers under the stem to be-
gin with. Observe the maximum stacking height of
spacers of 30 mm under the stem (h).
68 69
Fork - Headset
a
b
c
d h
g
f
e