Headset; Fork - Bosch Drive Unit Speed Manual Original

11 Headset

Headset
The headset is the bearing for the bike fork in the frame. If
the headset has been properly adjusted, it will turn easily.
In doing so, no play should be evident.
The headset is subject to a large amount of stress due to
impacts with the road surface. This can cause it to come
loose or affect its setting. Have the play and ease of move-
ment of the headset checked regularly by your specialist
cycle shop (for inspection intervals see ➠ Chapter 28.1
"Inspection schedule").
Checking the headset
If you do not adjust the headset properly or tighten
it too tightly, this could cause breakages. This should
therefore always be carried out by a professional bike
workshop.
If you ride with the headset loose, this could damage
the bearing shells or fork.

12 Fork

The front wheel is held in place by the bike fork. The bike
fork consists of two fork blades, the fork crown and steer-
ing tube.
Carbon fork Suspension fork
The suspension fork is a feature of most mountain bikes,
trekking bikes and city bikes. They can be adjusted in
different ways and provide a greater degree of riding com-
fort.
For information on the function, maintenance and care of
suspension elements, refer to ➠ Chapter 13 "Suspension
frame and suspension elements". Specific information on
your suspension fork is provided in the manufacturer's
operating instructions which you can find on the CD or the
manufacturer's website.
Never ride with a damaged bike fork. Do not attempt
to repair a defective bike fork. This can lead to serious
accidents. If you notice that the bike fork is warped or
otherwise damaged, replace it before using the bike
again.
Avoid sudden changes in ground level and riding off
high kerb stones. This can damage the fork and lead
to serious accidents.
Check regularly that the screws on the bike fork are
securely fastened. If screws are allowed to come
loose, this can cause serious accidents.
I General User Manual 19