Kalkhoff Bosch Active Line Original User Manual - 16 Wheels
I General User Manual
21
14 Bottom bracket and cranks
Chainrings are wear parts. Their service life depends on
various factors, e.g.
•
maintenance and care,
•
type of use and
•
distance travelled.
15 Checking the bottom bracket
The cranks must be securely fastened as this could
otherwise damage the crankset.
›
The cranks can come loose which is why you should
regularly check whether they are securely fastened
by attempting to rock them to and fro.
›
If there is play in the cranks, have the bike checked
and the cranks fastened securely by a professional
bike workshop .
If your bike has a carbon frame and a bottom bracket
housing for a BB30 bottom bracket please note the
following:
In this case you can fit an adapter so that a bottom
bracket with conventional BSA thread can be used.
However, bear in mind
•
You can only install the adapter if the frame is
completely undamaged. Repairing a defective
BB30 housing serves no purpose. If it is not
installed correctly, the bottom bracket housing
may be damaged which would render the war-
ranty void. This kind of adapter should only be
fitted by a specialist cycle shop.
•
Once the adapter has been fitted in the carbon
frame it cannot be removed.
16 Wheels
16.1 Checking the wheels
The wheels connect the bike with the surface you are rid-
ing on. The wheels are subject to a particularly high level
of stress due to unevenness of the riding surface and the
weight of the rider.
The wheels are carefully checked and trued prior to de-
livery. However, the spokes may settle when you ride the
first kilometres on your bike.
›
Have the wheels checked again and trued if neces-
sary after the first 100 kilometres by a specialist
cycle shop.
›
You should subsequently regularly check the ten-
sion in the spokes and have loose or damaged
spokes replaced, and/or have the wheel trued, by a
specialist cycle shop.
The wheel can be attached to the frame and fork in a num-
ber of different ways. In addition to the standard systems
in which the wheel is held on by axle nuts or quick-release
devices, different types of floating axles exist. These can
be held in place by a screw connection or different types
of quick-release devices. If your bike has a floating axle,
please also refer to the enclosed manufacturer's user man-
ual or visit the web pages of the relevant manufacturer in
the Internet.
Tighten all screws to the prescribed torque as other-
wise screws could shear off and components could
come loose or detach altogether (see
16.2 Checking the hubs
To check the hub bearings, proceed as follows:
›
Lift the wheel and spin it.
›
Check whether the wheel continues to turn through
several revolutions before it stops moving. If it
stops suddenly, the bearing is damaged. This does
not apply for front wheels with hub dynamos.
›
To determine whether there is play in the hub bear-
ing, try rocking the wheel in the bike fork or rear