Adjustment Of The A-Head System Handlebar Height; Aligning The Handlebar To The Front Wheel; Adjustment Of The Handlebar Height For An Adjustable Handlebar Stem; Checking The Headset - Kalkhoff Derby Instruction Manual

Adjustment of the A-Head system handlebar height

Stems such as the one illustrated here are called A-Head stems. If this system is fitted,
it is compulsory to have the handlebar height adjusted by a dealer.

Aligning the handlebar to the front wheel

To align the handlebar to the front wheel, proceed as follows:
Loosen the allen screw at the front side of the
stem by turning it in an anticlockwise direction
using an allen key.
Turn the handlebar to the desired position.
Ensure that the handlebar is clamped exactly at
the centre of the stem.
Tighten the allen screw in a clockwise direction
using an allen key (for tightening torque, see
page 45).

Adjustment of the handlebar height for an adjustable handlebar stem

On some types of handlebar stems, the tilt of the handlebar is variable.
The locking screws for the handlebar tilt adjustment can be found at the side of the
joint or on the top or the underside of the stem. There are also
models with additional retaining
catches or adjustment screws.
Loosen the locking screw
two to three turns in an
anticlockwise direction
using an allen key.
If you own a model with additional latching gear, proceed as follows:
To loosen the serration of the latching gear, turn the locking screw further in an
anticlockwise direction if necessary.
If you own a model with integrated retaining catches, proceed as follows:
Remove the retaining catch screws if necessary.
10
Allen screws
Adjustment
screw
The retaining catch screws are located on the underside of the stem
on many stem models.
Adjust the handlebar stem to the desired height
Tip the handlebar stem to the desired tilt.
To tighten the handlebar stem, proceed as follows:
In the case of models with integrated retaining catch, carefully tighten the
retaining catch screw in a clockwise direction.
The retaining catch must thereby grip the serration.
Tighten the locking screw in a clockwise direction using an allen key
(for tightening torque, see page 45).

Checking the headset

If the headset is improperly adjusted or tightened too hard, breakage
may occur, therefore always consult a dealer.
If you ride with a loose headset, damage may occur to the bearing casing
or the forks.
The headset forms the bearing of the
bicycle forks in the frame. A properly
adjusted headset can be easily tur-
ned. However, there should be no
play.
Shocks from the road place a great strain on the headset. It can be become loose
or misadjusted. Have the play and the ease of movement of the headset checked
regularly by a dealer (for intervals, see page 44).
Checking the bottom bracket
Chain sprockets are consumable parts. Their service lifetime depends on various
factors such as:
Maintenance and care,
type and duration of use and
the distance travelled.