29
3. Removing the tyre and inner tube
/
Mountain bikes are fit
-
ted with tubular tyres.
Read about this in the
enclosed instructions
provided by your manu-
facturer.
1. Open the brake
For more on this, read the description in the
chapter “Brakes” (Page 30).
Only use tubular tyres in the pre-
scribed manner with the correct tire
pressure.
Only use tubular tyres on rims in-
tended for this purpose! These do
not have rim flanges but a smooth
surface, curving inwards. This is where the
tubular tyres are fitted.
Fitting tubular tyres requires expert
skills and a lot of experience! Always
have a specialist change your tubu-
lar tyres. Obtain information about the correct
handling and replacement of tubular tyres.
Dealing with punctures
You need the following equipment to repair a tire
puncture:
•
Plastic tire lever
•
Patches
•
Rubber cement
•
Sandpaper
•
Open-ended spanner or wrench
(for wheels without quick release skewers)
•
Air pump
•
Spare tube
Source: Shimano
®
techdocs
2. Removing the wheel
•
If your bicycle has quick-release levers or ax-
les, open them (see page 10).
•
If your bicycle has hex nuts, loosen these with
a suitable spanner anti-clockwise.
You can then remove the front wheel according
to the steps listed above.
The following applies for rear wheels:
•
If your bicycle uses a derailleur gear system,
change gear to the smallest sprocket. In this
position, the rear derailleur poses the least
hindrance in removing the wheel.
•
If your bicycle has quick-release levers or ax-
les, open them (see page 10 and 11).
•
If your bicycle has hexagonal bolts, then loos-
en them in anti-clockwise direction with a fit
-
ting ring spanner or box-end wrench.
•
Pull the rear derailleur backwards somewhat.
•
Lift the bicycle slightly.
•
Lightly strike the wheel from above with the
palm of the hand.
•
Take the wheel out of the frame.
If your bicycle has a gear hub, please consult the
instructions supplied by your manufacturer for re-
moving the wheel.
Types of valve on bicycle tubes
Dunlop (W
oods) valve
Schrader valve
Presta valve
•
Unscrew the valve cap, the fastening nut and
possibly the cap nut from the valve. In the case
of Dunlop or Woods valves, remove the valve
stem.
•
Release all of the remaining air from the inner
tube.
•
Insert the tyre lever opposite the valve on the
inside of the tyre.
•
Insert the second tyre lever approx. 10 cm
from the first, between the rim and tyre.
•
Lift the tyre wall over the edge of the rim.
•
Repeat this lifting action around the wheel until
the entire tyre is free.
•
Remove the inner tube from the tyre.
For tubular tyres see page 28
Summary of Contents for Children's bike
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