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• After the first 100 kilometres, the wheels need
to be checked by a specialist and centred again
if required.
• The tension of the spokes should be checked
at regular intervals. Loose or damaged spokes
must be replaced or centred by a specialist
retailer.
The wheels can be fixed into the frame and fork
in different ways. Commonly, the wheel is at-
tached with an axle nut or a quick release. In ad-
dition, there are also various slide-in connections
which are screwed on or fixed with various quick
release systems.
If a slide-in shaft is fitted on your
pedelec, you can find more informa-
tion in the enclosed operating man-
ual or on the manufacturer's website on the
Internet.
All screws must be tightened with
the correct torque. Screws may
break and parts may become loose
if they are not tightened with the correct
torque (see page 39 "Torques for screw
connections").
28
Checking the hubs
You can check the hub bearings as follows:
• Lift both wheels up from the ground by first lift-
ing the pedelec at the front then at the rear.
Spin each wheel to start them turning.
• The wheel should continue to turn and then
slow evenly. If the wheel suddenly stops, the
bearing is defective. One exception is front
wheels with a hub dynamo. These have a
slightly higher resistance. This is not noticea-
ble when cycling, but can be seen in this test.
• The hub bearing should not exhibit play. Pull
the wheels from side to side in the fork and
frame to check if they are loose. No play
should be noticeable here.
• If the wheels can be slightly moved in their
bearings or are difficult to turn, the hub bear-
ings have to be set up by a specialist retailer.
Wheels/Tires
Clean the braking surfaces regularly according to
the inspection plan, page 36. Check the wear
markers during this process.
Rims undergo high strain and are
safety-relevant parts. They will be-
come worn from riding. If you see
any damage, do not ride using this rim.
Have them checked by a specialist retailer
and replaced if required. Wear can weaken
rims and lead to falls and serious accidents.
Rims made of composite materials
such as carbon fibre in particular re-
quire special attention. Friction
caused by rim brakes, as well as just simply
riding the bike, puts a high amount of strain
on the bike.
• Only use brake pads that are designed for
use on the rims' materials!
• Before every ride, check rims and wheels
made of composite materials for wear,
deformation, cracks and chipping!
• If you notice any changes, do not ride with
this part until it has been inspected by your
specialist retailer or manufacturer and
found to be in good condition!
• Never expose carbon fibre parts to high
temperatures. Even intense sunlight (e.g.
when the wheel is stored in a vehicle) can
produce high temperatures. This may re-
sult in damage to the structure of the part.
Failure of parts, falls and very serious inju-
ries could result.
The permitted tire pressure may not
be exceeded when inflating the
tires. Otherwise this could lead to a
tire bursting. The tires must be inflated to at
least the stated minimum tire pressure. If the
tire pressure is too low, there is a possibility
that the tire could free itself from the rim.
On the side surface of the tire, there is in-
formation on the maximum permitted tire
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