To pump up an inner tube with a Dunlop or lightning valve and Schrader or
automatic valve, proceed as follows:
➢
Screw off the valve cap in an anticlockwise direction.
➢
Pump up the inner tube using a suitable pump.
➢
Screw the valve cap onto the valve in a clockwise direction.
Repairing a puncture
If you wish to repair a
punctured tyre, you will need
the following equipment:
●
spare inner tube,
●
spare valve,
●
plastic tyre levers,
●
patches,
●
rubber glue,
●
sandpaper,
●
spanners (if your bicycle is not fitted with quick releases) and
●
bicycle pump.
To repair a punctured tyre, you must remove the defective wheel.
First remove the brakes. The procedure depends on the type of brakes fitted
to your bicycle.
Read the chapter on brakes before removing the brakes, otherwise the
braking system may be damaged. This can lead to accidents.
Removing a cantilever or V-brake
➢
Grip the wheel with your hand.
➢
Press the brake pads or the brake arms together against the wheel rim.
➢
Unhook the brake cable from one of the brake arms.
Removing a hydraulic wheel rim brake
There are two possibilities:
➢
If brake quick releases are fitted, dismount one brake unit
(see chapter “Use of the quick release“, page 7).
➢
If no quick releases are fitted, let the air out of the tyre.
Note the size of the fitted tyre. There are standard descriptions for tyre sizes.
Example 1: ”46-622“ means 46 mm tyre width and 622 mm diameter.
Example 2: ”28 x 1.60 Inch“ means 28 inch diameter and 1.60 inch tyre width.
Air pressures are often given in the English PSI unit. You will find a table to convert
pressure from PSI to Bar in the chapter “Technical data”, page 44.
Inner tubes
The inner tube is required to maintain the air pressure inside the tyre.
It is pumped up via a valve.
There are three different types of valve:
Sclaverand or racing valve (1),
Schrader or automatic valve (2) and
Dunlop or lightning valve (3).
All three types of valves are protected from the
ingress of dirt by a cap.
To pump up an inner tube with a Sclaverand or
racing valve, proceed as follows:
➢
Screw off the valve cap in an anticlockwise
direction with your finger.
➢
Unscrew the knurled nut in an anticlockwise
direction.
➢
Press the knurled nut into the valve with your
finger until air escapes.
➢
Pump up the inner tube using a suitable
pump.
A dealer can advise you which pump is suitable for your valve.
➢
Tighten the knurled nut after pumping by screwing it in a clockwise direction.
➢
Screw the valve cap onto the valve in a clockwise direction.
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DCW BedienA_GB UNI.qxd 24.10.2007 12:50 Uhr Seite 35
