40
The Presta valve (fig. 18b) has a narrower diameter and is only found on bicycle tires. To inflate a Presta valve tube using a Presta headed
bicycle pump, remove the valve cap; unscrew (counterclockwise) the valve stem lock nut; and push down on the valve stem to free it up. Then
push the pump head on to the valve head, and inflate. To inflate a Presta valve with a Schraeder pump fitting, you’ll need a Presta adapter
(available at your bike shop) which screws on to the valve stem once you’ve freed up the valve. The adapter fits into the Schraeder pump fitting.
Close the valve after inflation. To let air out of a Presta valve, open up the valve stem lock nut and depress the valve stem.
WARNING: We highly recommend that you carry a spare inner tube when you ride your bike. Patching a tube is an emergency
repair. If you do not apply the patch correctly or apply several patches, the tube can fail, resulting in possible tube failure, which
could cause you to loose control and fall. Replace a patched tube as soon as possible.
5. Service
WARNING: Technological advances have made bicycles and bicycle components more complex, and the pace of innovation is
increasing. It is impossible for this manual to provide all the information required to properly repair and/or maintain your
bicycle. In order to help minimize the chances of an accident and possible injury, it is critical that you have any repair or maintenance
which is not specifically described in this manual performed by your dealer. Equally important is that your individual maintenance
requirements will be determined by everything from your riding style to geographic location. Consult your dealer for help in
determining your maintenance requirements.
WARNING: Many bicycle service and repair tasks require special knowledge and tools. Do not begin any adjustments or service
on your bicycle until you have learned from your dealer how to properly complete them. Improper adjustment or service may
result in damage to the bicycle or in an accident which can cause serious injury or death.
If you want to learn to do major service and repair work on your bike:
1. Ask your dealer for copies of the manufacturer’s installation and service instructions for the components on your bike, or contact the
component manufacturer.
2. Ask your dealer to recommend a book on bicycle repair.
3. Ask your dealer about the availability of bicycle repair courses in your area.
We recommend that you ask your dealer to check the quality of your work the first time you work on something and before you ride the bike,
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