Headset and Pedals
HP
Velotechnik
49
H
a
n
d
li
n
g
i
n
st
ru
c
ti
o
n
s
Adjusting the headset (Streetmachine
Gte and Grasshopper fx)
The headset bearing supports the front fork in
the frame. It has to be adjusted so that the
fork with the front wheel turns easily without
showing play.
To check the bearing play pull the front brake
and grab the upper bearing cup with your
other hand. Now move your bicycle back and
forth. If the steering head bearing has play the
upper cup moves noticeably in contrast to the
fixed part.
Tiller steering and Streetmachine Gte under-
seat steering:
Loosen the clamping screws facing sidewards
at the steerer tube and tighten the screw in
the A-head cap a bit more.
After having adjusted the bearing play check if
the stem is adjusted in a parallel position to
the front wheel and tighten the two clamping
screws alternately with 6–8 Nm. Check the
clamping by trying to turn the stem against
the front wheel.
Danger!
The hex-headed screw in
the cap adjusts the play of the steering
head bearing. This screw does not help to
clamp the stem tightly to the steerer tube.
It does not secure it against turning. Take
care that both clamping screws on the side
are tightened as prescribed after you have
finished your works at the stem. Other-
wise the stem may turn while riding and
cause an accident.
Aerobar:
Take off the stem as described on page 28 .
Loosen the bolt of the clamp above the head-
set. Use a spacer tube on the fork’s steerer
which exceeds the steerer’s upper end. Use
an A-head cap screw it against the A-head star
nut already inserted in the steerer tube. Use
this screw to adjust the headset bearing play.
After adjusting, tighten the clamp with 6–8
Nm and remove cap and spacer tube.
Put on the stem until it touches the clamp.
There must be a “click” sound when the quick
release lever is closed which shows that the
lever is locked.
Danger!
Check if the clamping is
strong enough to secure the stem against
turning without the alignment bolt being
inserted. Readjust the quick release if nec-
essary. The bolt only helps to align the
stem and is not intended to transmit forc-
es.
Under seat steering (Grasshopper fx):
Loosen the bolt of the clamp above the head-
set. Tighten the screw in the A-head cap a bit
more. After adjusting the play tighten the
clamp with 4–6 Nm.
To check whether the front wheel turns
smoothly lift your bicycle at the frame so that
the front wheel moves freely above the
ground. Lean your bike to the side.
Now the handlebars should move smoothly
immediately. When you hold the frame
straight and push the handlebars slightly they
should move smoothly from their middle
position.
If the bearing is too tight undo the clamping
screws at the side and loosen the hex-headed
screw in the cap a little bit by turning it coun-
ter clockwise.
Now move the stem upwards by swinging it a
little bit. Check whether the handlebars move
freely without touching the frame or the seat.
Headset and Pedals