28
Dealing with a flat tyre
You require the following equipment:
• Mounting lever (plastic)
• Patch
• Rubber solution
• Sandpaper
•
Open-end spanner (for bicycles without
quick-release)
• Air pump
• Replacement inner tube
1. Openinig a brake
Read the description in chapter ‘’brakes’’ (page
29).
2. Removing the wheel
• If your bicycle has quick-release levers or ax-
les, open them (see page 10 and 11).
• 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 hin-
drance 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 hex nuts, loosen these with a
suitable spanner anti-clockwise.
• 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
removing the wheel.
Types of valve on bicycle tubes
3. Removing the tyre and inner tube
For tubular tyres, see page 27
• Unscrew the valve cap, the fastening nut and
possibly the cap nut from 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.
4. Change the inner tube
Switch the inner tube for an intact one.
For the change of tubular tyres and
tubeless tyres follow the instructions
of the rim or tyre manufacturer.
Source:
Presta valve
Dunlop (Woods) valve
Schrader valve
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